Briggs & Riley ZDX Underseat Cabin Bag: 17 x 10.75 x 9.5 in
underseat cabin bag, softside, no wheels, 2.1 lb empty. Exterior figures are the maker's own.
Under the seat at 0 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 ZDX fit? All 19 airlines
17 x 10.75 x 9.5 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 approved1.5 in to spare | No |
| Allegiant Air | 22 x 16 x 10 | Tight squeeze0.5 in to spare | No |
| British Airways | 22 x 18 x 10 | Tight squeeze0.5 in to spare | No |
| Frontier Airlines | 24 x 16 x 10 | Tight squeeze0.5 in to spare | No |
| Southwest Airlines | 24 x 16 x 10 | Tight squeeze0.5 in to spare | not published |
| Air France | 21.7 x 13.8 x 9.9 | Tight squeeze0.4 in to spare | No |
| Qatar Airways | 19.69 x 14.57 x 9.84 | Tight squeeze0.3 in to spare | not published |
| Lufthansa | 21.65 x 15.75 x 9.06 | Gate check0.4 in over | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Gate check0.4 in over | No |
| Air Canada | 21.5 x 15.5 x 9 | Gate check0.5 in over | No |
| Alaska Airlines | 22 x 14 x 9 | Gate check0.5 in over | not published |
| American Airlines | 22 x 14 x 9 | Gate check0.5 in over | No |
| Avelo Airlines | 22 x 14 x 9 | Gate check0.5 in over | No |
| Delta Air Lines | 22 x 14 x 9 | Gate check0.5 in over | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Gate check0.5 in over | not published |
| JetBlue Airways | 22 x 14 x 9 | Gate check0.5 in over | No |
| United Airlines | 22 x 14 x 9 | Gate check0.5 in over | No |
| Emirates | 21.65 x 14.96 x 8.66 | Gate check0.8 in over | not published |
| Ryanair | 21.65 x 15.75 x 7.87 | Gate check1.6 in over | No |
Bag spec source: briggs-riley.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.
Briggs & Riley publishes two dimension sets for each wheeled bag: Exterior Dimensions (includes wheels & handles) and Case Dimensions (excludes wheels & handles). The exterior set is the overall gate sizer measurement and is stored in exterior; the case set is stored in bodyOnly. Depths are listed as a compressed to expanded range, so the stored exterior depth is the compressed value and expandedDepthIn is the expanded value. All dimensions are published in inches with cm secondary.
All 13 Briggs & Riley bags
