Monos Metro Duffel: 16.3 x 11.2 x 7.2 in
personal-item, duffel, no wheels, 3.5 lb empty. Exterior figures are the maker's own.
Under the seat at 6 of 13 airlines with a published limit
The table below shows the verdict at every airline, best fit first, using the same math as the live fit checker.
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Does the Metro Duffel fit? All 19 airlines
16.3 x 11.2 x 7.2 in against each airline's published carry-on box, largest side to largest side, sorted best fit first.
| Airline | Cabin max (in) | Verdict | Under seat |
|---|---|---|---|
| Sun Country Airlines | 24 x 16 x 11 | Cabin approved3.8 in to spare | Yes |
| Allegiant Air | 22 x 16 x 10 | Cabin approved2.8 in to spare | Yes |
| British Airways | 22 x 18 x 10 | Cabin approved2.8 in to spare | No |
| Frontier Airlines | 24 x 16 x 10 | Cabin approved2.8 in to spare | Yes |
| Southwest Airlines | 24 x 16 x 10 | Cabin approved2.8 in to spare | not published |
| Air France | 21.7 x 13.8 x 9.9 | Cabin approved2.6 in to spare | No |
| Qatar Airways | 19.69 x 14.57 x 9.84 | Cabin approved2.6 in to spare | not published |
| Lufthansa | 21.65 x 15.75 x 9.06 | Cabin approved1.9 in to spare | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Cabin approved1.9 in to spare | No |
| Air Canada | 21.5 x 15.5 x 9 | Cabin approved1.8 in to spare | No |
| Alaska Airlines | 22 x 14 x 9 | Cabin approved1.8 in to spare | not published |
| American Airlines | 22 x 14 x 9 | Cabin approved1.8 in to spare | Yes |
| Avelo Airlines | 22 x 14 x 9 | Cabin approved1.8 in to spare | Yes |
| Delta Air Lines | 22 x 14 x 9 | Cabin approved1.8 in to spare | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Cabin approved1.8 in to spare | not published |
| JetBlue Airways | 22 x 14 x 9 | Cabin approved1.8 in to spare | Yes |
| United Airlines | 22 x 14 x 9 | Cabin approved1.8 in to spare | No |
| Emirates | 21.65 x 14.96 x 8.66 | Cabin approved1.5 in to spare | not published |
| Ryanair | 21.65 x 15.75 x 7.87 | Tight squeeze0.7 in to spare | No |
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
