Monos Expandable Carry-On: 22 x 14 x 9.8 in
carry-on, hardside, 4 spinner wheels, 7.8 lb empty. Exterior figures are the maker's own, wheels and handles included.
Cabin approved at 5 of 19 airlines
The table below shows the verdict at every airline, best fit first, using the same math as the live fit checker. For why so many carry-ons fail the US standard box, see our 22 x 14 x 9 breakdown.
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Does the Expandable Carry-On fit? All 19 airlines
22 x 14 x 9.8 in against each airline's published carry-on box, largest side to largest side, sorted best fit first.
Expansion warning: zipped open, this bag runs 11.4 in deep (22 x 14 x 11.4 in) and clears 0 of 19 airlines instead of 5. Expanded, it flips to gate check on Sun Country Airlines, Frontier Airlines, Southwest Airlines, Allegiant Air, British Airways. Fly with it zipped shut.
| Airline | Cabin max (in) | Verdict | Under seat |
|---|---|---|---|
| Sun Country Airlines | 24 x 16 x 11 | Cabin approved1.2 in to spare | No |
| Frontier Airlines | 24 x 16 x 10 | Tight squeeze0.2 in to spare | No |
| Southwest Airlines | 24 x 16 x 10 | Tight squeeze0.2 in to spare | not published |
| Allegiant Air | 22 x 16 x 10 | Tight squeeze0 in to spare | No |
| British Airways | 22 x 18 x 10 | Tight squeeze0 in to spare | No |
| Air France | 21.7 x 13.8 x 9.9 | Gate check0.3 in over | No |
| Lufthansa | 21.65 x 15.75 x 9.06 | Gate check0.7 in over | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Gate check0.7 in over | No |
| Air Canada | 21.5 x 15.5 x 9 | Gate check0.8 in over | No |
| Alaska Airlines | 22 x 14 x 9 | Gate check0.8 in over | not published |
| American Airlines | 22 x 14 x 9 | Gate check0.8 in over | No |
| Avelo Airlines | 22 x 14 x 9 | Gate check0.8 in over | No |
| Delta Air Lines | 22 x 14 x 9 | Gate check0.8 in over | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Gate check0.8 in over | not published |
| JetBlue Airways | 22 x 14 x 9 | Gate check0.8 in over | No |
| United Airlines | 22 x 14 x 9 | Gate check0.8 in over | No |
| Emirates | 21.65 x 14.96 x 8.66 | Gate check1.1 in over | not published |
| Ryanair | 21.65 x 15.75 x 7.87 | Gate check1.9 in over | No |
| Qatar Airways | 19.69 x 14.57 x 9.84 | Gate check2.3 in over | not published |
Bag spec source: monos.com · accessed 2026-07-09. Airline limits come from each carrier's official baggage page; open an airline above for its citations. Policies change, so verify a borderline case before you fly.
Monos publishes both imperial (inches) and metric (centimeters) dimensions on every product page, and each hardside suitcase page explicitly states that the listed exterior measurements include the wheels and fixed handles, meaning these are overall, gate sizer style dimensions rather than body only. Monos does not publish a separate body only figure for any line checked, and its two soft sided Metro bags do not carry this wheel inclusion note since they have no wheels.
All 12 Monos bags
