Built to catch you out.

Asiana may ask you to show the card used to buy the ticket at check-in, and can refuse boarding if it can't be confirmed. Asiana Airlines: Notice on fraud activity of flight sales and impersonation (19 Dec 2023), checked 2026-10-24

Pay online by card and you must show that same card, with your passport, at check-in, or Hainan can refuse to board you; the cardholder must be travelling. Hainan Airlines: Terms and conditions (Australia site), checked 2026-10-24

PAL can ask you to show the card (or a copy of the card) used to buy the ticket online at check-in, and can refuse to board you if you can't. Philippine Airlines: Online Booking Terms and Conditions (Australia), checked 2026-10-22

Scoot's conditions say you may be asked to show the credit card used to make the booking when you check in. Scoot: Conditions of Carriage (effective 5 Oct 2026), checked 2026-10-24

If Turkish flags an online purchase, you must show the card you paid with and ID at a Turkish office or check-in counter before the flight. Turkish Airlines: Conditions of Online Channels, checked 2026-10-24

Extra kilos at the airport cost USD 37 (about A$53) a kilo between Australia and India; prepaying online at least 2 hours before departure is up to 20% cheaper. Air India: Excess baggage, checked 2026-10-22

On a trans-Tasman seat fare, the first checked bag costs A$30 online but A$105 at the airport. Air New Zealand: Seats to Suit short haul fares, checked 2026-10-22

A standard seat costs up to AUD 88.20 at booking, AUD 117.60 after booking and AUD 127.40 at the airport counter, per flight. AirAsia: Fees and charges AirAsia X Berhad (D7) (PDF), checked 2026-10-22

A 20 kg bag from Sydney or Brisbane to Kuala Lumpur costs A$110 bought with the fare, but RM440 (about A$150) if added after booking; rates are per flight. Batik Air: Baggage, checked 2026-10-24

An extra 23 kg bag from Sydney costs A$153 each way if added online before check-in, but A$181-182 at the airport. British Airways: Baggage calculator (on the Australian baggage essentials page), checked 2026-10-23

A 20 kg bag on Australia flights costs PHP 3,000 (about A$67) online but PHP 6,000 (about A$135) at the airport or gate. Cebu Pacific Help Center: CEB Baggage Guidelines and Upgrade Options, checked 2026-10-22

Extra kilos at the airport cost up to USD 50 (about A$71) a kilo from Australia to Europe; Emirates says buying ahead is up to 45% cheaper but only shows that price in Manage your booking. Emirates: Buy extra baggage allowance, checked 2026-10-22

Extra baggage from Australia costs from USD 70 to USD 200 (about A$100-285) per 5 kg; Etihad says buying online ahead saves up to 65%. Etihad: Extra baggage, checked 2026-10-22

A prepaid extra bag to Nadi costs A$140 online, but A$230 if you buy it at the airport; to Los Angeles it's A$280 online. Fiji Airways: Prepaid extra baggage, checked 2026-10-22

On Economy Light from Australia, a first checked bag costs EUR 100-120 (about A$160-192) each way prepaid but EUR 140 (about A$224) at the airport. Finnair: Extra baggage fees, checked 2026-10-23

An extra bag between Australia and Indonesia costs USD75 (about A$107) prepaid online by 6 hours before departure, but USD105 (about A$150) at the airport. Garuda Indonesia: Baggage Policy (Australia) - Checked Baggage, Cabin Baggage, Excess Baggage Piece Concept, checked 2026-10-23

Extra +7 kg carry-on costs A$60 domestic (A$85 international) at check-in but A$85 (A$110) at the gate; an unbought checked bag at the airport is A$120 domestic or A$170 international for 20 kg. Jetstar: Excess baggage charges at the airport, checked 2026-10-22

On a bagless Economy Light fare the first bag costs EUR70-85 (about A$112-136) each way online, but EUR105 (about A$168) at check-in. Lufthansa: Excess baggage, checked 2026-10-23

Excess baggage at the airport counter costs 25% more than buying it online at least 24 hours before, e.g. USD30 instead of USD24 a kilo to Malaysia. Malaysia Airlines: Extra baggage (Australia), checked 2026-10-24

From Australia, 20 kg of extra baggage costs A$141 if you prepay online but about A$700 at the check-in counter, where PAL charges A$35 a kilo. Philippine Airlines: Excess Baggage Charge (international), checked 2026-10-22

Extra kilos from Australia cost USD 30-45 a kilo (about A$43-64) bought online more than 6 hours before departure, but USD 50-60 a kilo (about A$71-86) at the airport, so 10 kg left to check-in costs about A$285 more. Qatar Airways: Additional baggage, checked 2026-10-24

Extra bag weight costs A$20 per 5 kg when you book, but A$5.50 a kilo at the airport, so the same 5 kg costs A$27.50. Rex: Baggage allowance, checked 2026-10-22

A 20 kg bag costs AUD53-55 when you book but AUD121 at the airport, and a standard seat AUD15 at booking but AUD20-22 at the airport counter. Scoot: Fees Chart (PER-SIN, SYD-SIN, MEL-SIN), checked 2026-10-22

Extra baggage bought within 6 hours of departure or at the airport costs USD 22 per kg to Singapore instead of USD 16.50 online more than 48 hours out, about A$157 instead of A$118 for 5kg. Singapore Airlines: Additional baggage, checked 2026-10-22

An extra 23kg bag bought at the airport costs USD 190 (about A$271) from Sydney, Melbourne or Brisbane to Bangkok, against USD 160 (about A$228) prepaid online at least 24 hours before the first flight. Thai Airways: Excess baggage (Australia), checked 2026-10-22

A 20kg bag to Australia costs about AUD 52 when booked online but about AUD 94 at the airport. VietJet: Fee and charges, checked 2026-10-22

An extra 23 kg bag costs USD200 (about A$285) prepaid online but USD260 (about A$370) at the airport. Vietnam Airlines: Excess baggage fee at airport, checked 2026-10-22

A domestic extra bag costs A$77-107 if bought online but A$120-170 at the airport. Virgin Australia: Checked baggage, checked 2026-10-22

Without paid seats, Jetstar assigns seats randomly at check-in; it seats children aged 2-11 with a parent but says it can't guarantee the rest of the family will sit together. Jetstar: Family travel and seating, checked 2026-10-24

Without a paid seat (AUD15-19 per flight on plain Economy), Scoot assigns seats at check-in and says your group, and even a child and parent, may not be seated together. Scoot: Choose Your Seat, checked 2026-10-24

On Basic Economy United chooses your seat and says people travelling together may be separated; only up to two children under 12 can sit next to the first adult for free. United: Basic Economy, checked 2026-10-22

Your two cabin bags must weigh 7 kg combined; a bag taken at the gate costs up to AUD 110 per flight. AirAsia: Fees and charges AirAsia X Berhad (D7) (PDF), checked 2026-10-22

Economy allows 7 kg for the cabin bag and a personal item together, and excess found at the gate costs RM50 (about A$17) per kilo. Batik Air: Baggage, checked 2026-10-24

A carry-on that is unpaid or over 55 x 40 x 23 cm (8 kg with your small bag) is sent to the hold at the gate for EUR 60 (about A$96). Finnair: Carry-on baggage, checked 2026-10-23

Your two cabin bags must weigh 7kg combined, and a bag that has to be checked at the gate costs up to AUD 82 per flight on flights from Australia. AirAsia: Fees and charges PT. Indonesia AirAsia (QZ) (PDF), checked 2026-10-22

Jetstar weighs and sizes carry-on at the gate: over the limit costs A$125 domestic or A$175 international and the bag goes in the hold, even if you've already bought checked baggage. Jetstar: Excess baggage charges at the airport, checked 2026-10-22

Scoot's 10 kg cabin allowance covers your carry-on and personal item together; arrive over it and you're sent to check the bag in and may pay excess fees. Scoot: Baggage, checked 2026-10-22

Carry-on (7kg on Eco) can be re-weighed and measured at the boarding gate, and a bag over the limit must be paid for at gate prices or is refused. VietJet: Baggage service, checked 2026-10-24

Air Canada's tariff bans using a return fare one way or skipping flights to get a cheaper price, and lets it cancel the rest of the ticket if you do. Air Canada: International Tariff, general rules (PDF), checked 2026-10-24

Miss a flight or don't use your onward or return booking and Air New Zealand cancels it without refund, and may cancel other flights on the ticket too. Air New Zealand: Conditions of Carriage, checked 2026-10-24

Miss a flight or fly them out of order and ANA cancels every later flight on the itinerary; on a non-refundable fare you get nothing back. ANA: Reserving and purchasing international flights on the ANA Australia website, checked 2026-10-22

Flights must be flown in ticket order from the first, and not turning up costs a USD160 (about A$228) economy no-show fee, or USD500 if you check in and then don't board. Asiana Airlines: Reservation guide, change and refund (Australia site), checked 2026-10-23

If you miss a flight without telling Cathay beforehand, it may cancel your onward and return flights. Cathay Pacific: General Conditions of Carriage for passengers and baggage (PDF), checked 2026-10-24

Miss any flight without telling Delta first and it may cancel all your remaining flights, with no value left on the ticket. Delta: Contract of Carriage, International, checked 2026-10-24

Finnair's booking conditions say flights must be used in order, and if you don't use one, all remaining flights on the ticket are cancelled automatically. Finnair: Conditions for bookings (Australia), checked 2026-10-24

Skip a flight or fly them out of order and Lufthansa recalculates the fare for the route you actually flew, collects any difference, and can refuse carriage until you pay it. Lufthansa: General Conditions of Carriage for Passengers and Baggage (29 Oct 2025), checked 2026-10-24

PAL only honours flights in the order on the ticket: skip one and the ticket can lose its validity, or PAL recalculates the fare and you pay the difference. Philippine Airlines: General Conditions of Carriage (Australia site), checked 2026-10-24

Once you've started travelling, skip a flight on your ticket and Qantas can refuse you on the later ones unless you pay to reprice the ticket at the full unrestricted fare. Qantas: Conditions of Carriage, checked 2026-10-24

Miss a Qatar Airways flight without telling the airline first and your onward and return flights on the ticket are cancelled. Qatar Airways: Conditions of Carriage, checked 2026-10-24

If you don't use a flight on your ticket and haven't told Singapore Airlines beforehand, it can cancel every later flight on the ticket, including the way home. Singapore Airlines: Conditions of carriage (Australia), checked 2026-10-24

Miss a flight without telling Thai Airways and the rest of your booking, including the flight home, is cancelled. Thai Airways: Reservation & Ticketing Terms and Conditions (Australia), checked 2026-10-24

Turkish accepts flight coupons only in order, so if you skip the first flight of an international ticket it may not honour the rest. Turkish Airlines: Conditions of Online Channels, checked 2026-10-24

Flights must be used in the order on the ticket; skip one and the ticket loses its validity, including the later flights. Vietnam Airlines: Conditions of Carriage (PDF, linked from the Australia site), checked 2026-10-24

Skip or miss a flight without telling Virgin Atlantic and it may cancel the rest of your ticket, including the flight home. Virgin Atlantic: Conditions of carriage, Article 6 (reservations and tickets), checked 2026-10-24

If you don't take a flight, Virgin can charge a service fee and cancel your onward or return flights on the booking. Virgin Australia: Conditions of Carriage, checked 2026-10-24

Choosing a seat on Economy Basic costs CA$25-150 (about A$25-152) per flight, so SYD-YVR-YYZ is two seat fees each way. Air Canada: Fees related to baggage and optional services, checked 2026-10-22

Air China charges excess baggage on each segment, so an extra bag costs USD 160 (about A$228) to Beijing and again on any onward flight. Air China: Excess baggage charges, international routes, piece concept (Appendix I, linked from the AU excess baggage fee page), checked 2026-10-24

Paying by card on a booking from Australia costs AUD 10 per passenger per flight, so a return for two is AUD 40. AirAsia: Fees and charges AirAsia X Berhad (D7) (PDF), checked 2026-10-22

Preferred seats (USD 4-139, about A$6-198) and Main Cabin Extra seats (USD 20-280, about A$28-399) are charged per flight, so a connection in the U.S. means paying again. American Airlines: Bag and optional fees, checked 2026-10-22

On Light and Value fares a window or aisle seat costs USD39 (about A$56) per person, per flight, so a connection or return doubles it. ANA: Paid Advance Seat Reservation (international), checked 2026-10-22

On Economy Light a regular seat costs per flight: USD 37-46 (about A$53-66) Hong Kong-Australia, then again for any onward flight. Cathay Pacific: Reserve your seat (Applicable fees), checked 2026-10-22

A regular seat on Special and Saver costs A$15-45 per flight, so a connection in Dubai means paying twice each way. Emirates: Seat selection, checked 2026-10-22

Paid seats are charged per flight, not per trip, so a stop each way means paying for four seats on a return. Finnair FAQ: does a paid seat/extra bag/meal cover the return flight?, checked 2026-10-23

Paying by credit or debit card for a flight from Australia adds AUD 8 per passenger per flight, so a family of four pays AUD 32 in card fees on the flight to Bali alone, and more again on any connection. AirAsia: Fees and charges PT. Indonesia AirAsia (QZ) (PDF), checked 2026-10-22

A Starter fare change costs A$75-120 per person, per flight, plus any fare difference, so changing a return trip pays it twice. Jetstar: Fees and charges, checked 2026-10-22

In the cheapest booking class (T) even a standard seat costs USD50 (about A$71) per flight from Australia, so a trip via Seoul pays it on every flight. Korean Air: Preferred seat (Economy), standard seat fee, checked 2026-10-23

Extra bags are charged per segment: a second bag is USD130 (about A$186) from Australia to Seoul, and each onward flight from Seoul adds its own charge. Korean Air: Excess baggage (fee at a glance, by segment), checked 2026-10-23

Seat reservations are charged per flight, and Lufthansa publishes no prices; only Economy Comfort Flex includes one. Lufthansa: Seat reservations FAQ, checked 2026-10-23

On Economy Lite, a standard seat is charged per flight: USD 20 (about A$28) to Singapore plus USD 10-30 (about A$14-43) for the onward flight, so a trip to Europe via Singapore pays four times on a return. Singapore Airlines: Taxes and service fees (advance seat selection table), checked 2026-10-22

On EcoFly and ExtraFly, choosing even a standard seat costs USD15-60 (about A$21-85) per flight, and Australia-Istanbul via Singapore or Kuala Lumpur is two flights each way. Turkish Airlines: Seat selection terms and conditions, checked 2026-10-23

Every payment method attracts a AUD 14 convenience charge per passenger per flight on Australia routes, so a return trip adds AUD 28 a person. VietJet: Fee and charges, checked 2026-10-22

An extra checked bag costs GBP 80 (about A$153) per flight, and Sydney or Brisbane to London is two flights each way via Seoul, so one bag can cost about A$305 each way. Virgin Atlantic: Optional service and travel fees, checked 2026-10-23

Domestic extra bags are priced per piece per flight, so a return trip or a connection pays the bag fee on every flight. Virgin Australia: Checked baggage, checked 2026-10-22

Air China doesn't publish its change or refund fees; they depend on the fare rules and how close to departure you change. Air China Australia: Voluntary refund and change rules of CA international tickets (revised Nov 2023), checked 2026-10-24

Preferred seat prices aren't published; Air China says they're 'as shown at the time of booking'. Air China Australia: Advance seat selection (Preferential and extra large seats), checked 2026-10-24

Air India's change and cancellation fee table for Australia shows bare numbers (12,000 to change an Economy Value ticket, 25,000 to cancel) with no currency, so you can't tell the real cost before booking. Air India: Request refund (change and cancellation penalties by region), checked 2026-10-22

Value and Standard fares charge a fee to change, and Standard a fee to refund, but ANA doesn't publish the amounts. ANA: More international flight fare options (Australia), checked 2026-10-22

Asiana doesn't publish its fare types, or change and refund fees, for tickets bought in Australia. Asiana Airlines: Reservation guide, change and refund (Australia site), checked 2026-10-23

BA doesn't publish seat prices; on Basic, Standard and Select you only see them inside the booking or Manage My Booking. British Airways: Choosing your seat in advance (Australia), checked 2026-10-23

BA's cancellation fee isn't published; it's only shown once you start cancelling in Manage My Booking. British Airways: Manage booking FAQs (Australia), checked 2026-10-23

Every economy fare, even Flex, has a cancellation fee and a no-show fee, but Cathay only shows the amounts when you book. Cathay Pacific: Fare classes (Australia), checked 2026-10-22

Every booking pays an Admin Fee, but Cebu Pacific doesn't publish the amount. Cebu Pacific Help Center: Service Fees, checked 2026-10-22

Change fees aren't published; Cebu Pacific shows them only in the booking summary when you rebook. Cebu Pacific Help Center: Rebooking or Canceling Your Flight, checked 2026-10-22

China Eastern doesn't publish change or refund fees for tickets from Australia; its international rules say only that fees depend on when you change or refund and on the fare's own rules, and a change fee already paid is not refunded. China Eastern: Voluntary Changes and Refunds for International Flights, Implementing Rules (from 20 Jan 2026), checked 2026-10-24

The front economy rows and exit rows are paid Preferred Seats, but China Eastern doesn't publish the price. China Eastern: Preferred Seat (Value-Added Seat Reservation), checked 2026-10-24

China Southern sells prepaid extra bags online but doesn't publish the prices; at the airport an extra bag costs USD 160 (about A$228). China Southern: Purchasing Additional Baggage (Australia site), checked 2026-10-23

China Southern doesn't publish change or refund fees for international tickets bought in Australia. China Southern FAQ: Refund and Change (Australia site), checked 2026-10-23

Etihad doesn't publish seat prices; you only see them when choosing a seat. Etihad: Choose your seat, checked 2026-10-22

Booking through the Fiji Airways call centre or at the airport adds a fee, but the Australian fares page doesn't say how much. Fiji Airways: Airfare deals from Australia, checked 2026-10-24

Finnair doesn't publish its seat prices; you only see them when choosing a seat. Finnair: Seat selection, checked 2026-10-23

Garuda says exit and extra-legroom seats may cost extra, and changes may cost a fee depending on fare type, but publishes no amounts. Garuda Indonesia: Frequently Asked Questions (Australia), checked 2026-10-23

Hainan sells extra bags online at a discount on the AUD220 airport price, but doesn't publish the online price, and won't sell it if you connect within 24 hours. Hainan Airlines: Prepaid baggage, checked 2026-10-24

Every change costs a change fee plus any fare difference, and refunds lose a refund fee, but Hainan doesn't publish the amounts. Hainan Airlines: Voluntary refund and change for international tickets, implementing rules (Australia site), checked 2026-10-24

JAL doesn't publish its fare rules or change fees for tickets starting in Australia; they're only shown when you book. JAL: Australia/New Zealand fares (journeys from Japan), checked 2026-10-22

Choosing to pay in a currency other than the local one (JAL's Multi Currency Pricing) adds a currency conversion fee that JAL doesn't state. JAL: Booking rules (Australia) - payment, cancellations and changes, checked 2026-10-22

Changes and refunds cost a fee on Saver, Standard and most Flex fares, but Korean Air doesn't publish the amounts for trips from Australia. Korean Air: International fares (Economy Saver / Standard / Flex), checked 2026-10-23

Lufthansa says some payment methods cost extra, but doesn't say which or how much. Lufthansa: Payment options, checked 2026-10-23

On Economy Value you pay to pick even a standard seat, but Malaysia Airlines doesn't publish the price, only that it varies by route. Malaysia Airlines: Terms and conditions (Australia) - Card Payment Fee and Seat Selection, checked 2026-10-24

Every economy fare, Flex included, charges a refund fee and a no-show fee, and Malaysia Airlines doesn't publish the amounts. Malaysia Airlines AskMH: How does the Fare Family work?, checked 2026-10-24

Qantas sells seat selection on fares that don't include it but doesn't publish the seat prices; joining Qantas Frequent Flyer and booking direct gets a free standard seat on flights from Australia. Qantas: Seating options, checked 2026-10-22

Pre-purchased extra baggage is cheaper than the airport rate, but Qantas doesn't publish its price; the airport price is published, A$161 per extra bag domestic and A$84 a kilo to Europe. Qantas: Pre-purchase additional baggage (incl. airport excess and heavy charges), checked 2026-10-22

Booking or changing a ticket by phone or at the airport adds a non-refundable service fee that Qatar only describes as 'starting from $25', without saying the currency or the full price. Qatar Airways: Optional services and fees, checked 2026-10-22

Value, Standard and Flexi fares charge a cancellation fee and a no-show fee, but Singapore Airlines doesn't publish the amounts outside the fare rules shown during booking. Singapore Airlines: Fare types (Australia), checked 2026-10-22

Thai Airways' Australian terms say a refund fee may apply and changes cost 'applicable fees', but don't publish the amounts or which economy fares allow them. Thai Airways: Reservation & Ticketing Terms and Conditions (Australia), checked 2026-10-24

Turkish Airlines' checked baggage page lists no allowances or extra-bag prices for Australian routes, only a calculator, and says extra baggage fees may change up to 8 hours before the flight. Turkish Airlines: Checked baggage, checked 2026-10-24

Economy pays to choose a seat in advance, but Vietnam Airlines only shows the price during seat selection. Vietnam Airlines: Advance seat selection (Australia), checked 2026-10-22

Change and refund fees for each economy fare are only shown during the booking process, not on a published page. Vietnam Airlines: Voluntary refund and rebook (Australia), checked 2026-10-22

Every economy fare pays to choose a seat before check-in opens 24 hours out, but Virgin Atlantic doesn't publish the seat prices. Virgin Atlantic: Optional service and travel fees, checked 2026-10-23

Flexible tickets can be changed, but Virgin Atlantic says only that the change fees 'vary' and doesn't publish them. Virgin Atlantic: Optional service and travel fees, checked 2026-10-23

Lite fares pay to choose a seat before the last 3 hours, and Virgin doesn't publish the seat price. Virgin Australia: Seat selection, checked 2026-10-22

Booking with an Air Canada phone agent adds a non-refundable CA$30 (about A$30) fee per passenger from 15 October 2026. Air Canada: Fees related to baggage and optional services, checked 2026-10-22

Global Saver and Global Saver Max changes are made by phone, so the A$60 Contact Centre fee comes on top of the A$80-100 change fee. Air New Zealand: Global Saver fares, checked 2026-10-22

Asking American's Reservations team to help change a trip you booked online adds a USD 50 (about A$71) fee. American Airlines: Bag and optional fees, checked 2026-10-22

Paying by card adds 3% to the whole fare on bookings from Australia; PayTo or a bank transfer avoids it. Batik Air Malaysia: Card Payment Surcharge Policy (PDF), checked 2026-10-22

On Australian routes (priced as long-haul), the first economy row behind each partition and exit-row seats cost RMB 800 (about A$171), window or aisle seats in rows 2-11 RMB 500 (about A$107), and middle seats in rows 2-11 RMB 200 (about A$43). China Southern: Guidelines for Seat Preselection Service (Australia site), checked 2026-10-24

Every change or refund on an Economy ticket adds a USD 30 (about A$43) service fee, 10% more within 96 hours of the flight, and missing a flight adds a no-show fee on top of the change fee. Etihad: Modification guide FAQ, checked 2026-10-22

A checked bag over 23 kg costs a USD52.50 (about A$75) Heavy Bag fee between Australia and Indonesia, payable only at the airport, so it can't be prepaid. Garuda Indonesia: Baggage Policy (Australia) - Checked Baggage, Cabin Baggage, Excess Baggage Piece Concept, checked 2026-10-23

Not turning up for a flight costs an economy no-show fee of KRW100,000 (about A$108), on top of any change or refund fee. Korean Air: No-show fee, checked 2026-10-23

Basic and Flex include only Standard seats free; Window, Front Row, Extra Legroom, Emergency Exit and Economy Comfort seats cost extra on every economy fare. Malaysia Airlines: Terms and conditions (Australia) - Card Payment Fee and Seat Selection, checked 2026-10-24

Missing an Economy Supersaver flight costs a A$300 no-show fee (A$95 on other economy fares from Australia). Philippine Airlines: Fare rules and conditions - Australia, checked 2026-10-22

PAL processes online payments in the Philippines, so an Australian card can be charged its bank's foreign transaction fee even though the fare is in AUD. Philippine Airlines: Online Booking Terms and Conditions (Australia), checked 2026-10-22

Cancel a Sale, Saver or Red e-Deal fare for a Flight Credit and the change fee (A$121 domestic, A$100-250 international) is deducted when you use the credit. Qantas: Fare guides Australia to Asia, Japan, Europe/UK, North America, checked 2026-10-22

Don't turn up for a flight and the whole fare is forfeited; on Promo and Saver fares you also lose everything if you cancel after midnight the night before. Rex: Fees and surcharges, checked 2026-10-22

Booking, changing or cancelling through the Rex call centre adds a A$22 service fee that the same task online doesn't cost. Rex: Fees and surcharges, checked 2026-10-22

A bag over 158 cm (length + width + height) pays an oversize fee of USD110-150 (about A$157-214) even when it's inside your free allowance. Turkish Airlines: Checked baggage, checked 2026-10-24

A 20kg bag on Australia routes rises from about AUD 52 to AUD 63 if you add it more than 24 hours after booking. VietJet: Fee and charges, checked 2026-10-22

A Lite fare can't be changed on the day of travel: from midnight before departure the whole fare is lost. Virgin Australia: Domestic fares, checked 2026-10-22