Charged per flight, not per trip. 17 airlines

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