Packing for mixed airlines? A bag no bigger than 40 × 30 × 15 cm (longest side first, any orientation) fits inside the free allowance of every one of the 29 airlines on this site.
That number is computed, not opinion: it is the smallest free allowance on each axis once every airline's published limit is sorted longest-to-shortest. It shrinks when any airline shrinks its allowance, so check the date in the footer.
| Airline | Biggest free bag | Which allowance |
|---|---|---|
| Air Canada | 55 × 40 × 23 cm | cabin bag |
| Air France | 55 × 35 × 25 cm | cabin bag |
| airBaltic | 40 × 30 × 15 cm | personal item |
| American Airlines | 56 × 36 × 23 cm | cabin bag |
| Austrian Airlines | 40 × 30 × 15 cm | personal item |
| British Airways | 56 × 45 × 25 cm | cabin bag |
| Delta | 56 × 35 × 23 cm | cabin bag |
| easyJet | 45 × 36 × 20 cm | personal item |
| Emirates | 55 × 38 × 22 cm | cabin bag |
| Etihad | 56 × 36 × 23 cm | cabin bag |
| Finnair | 40 × 30 × 15 cm | personal item |
| Iberia | 56 × 40 × 25 cm | cabin bag |
| Jet2 | 56 × 45 × 25 cm | cabin bag |
| KLM | 55 × 35 × 25 cm | cabin bag |
| Lufthansa | 40 × 30 × 15 cm | personal item |
| Norwegian | 40 × 30 × 20 cm | personal item |
| Qantas | 56 × 36 × 23 cm | cabin bag |
| Qatar Airways | 50 × 37 × 25 cm | cabin bag |
| Ryanair | 40 × 30 × 20 cm | personal item |
| SAS | 40 × 30 × 15 cm | personal item |
| SWISS | 40 × 30 × 15 cm | personal item |
| TAP Air Portugal | 55 × 40 × 25 cm | cabin bag |
| TUI Airways | 55 × 40 × 20 cm | cabin bag |
| Turkish Airlines | 55 × 40 × 23 cm | cabin bag |
| United | 56 × 35 × 23 cm | cabin bag |
| Virgin Atlantic | 56 × 36 × 23 cm | cabin bag |
| Vueling | 40 × 30 × 20 cm | personal item |
| WestJet | 41 × 33 × 15 cm | personal item |
| Wizz Air | 40 × 30 × 20 cm | personal item |
Weight is the other constraint: several airlines cap the free bag by weight as well as size. The airline pages list both.
Allowances checked 19 August 2026 against each airline's own baggage page. Rules change with little notice — the airline's page is the authority on the day you fly.