Peak Design Travel Backpack 30L: 20.9 x 13 x 7 in
30L, backpack, no wheels, 3.17 lb empty. Exterior figures are the maker's own.
Cabin approved at 18 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 Travel Backpack fit? All 19 airlines
20.9 x 13 x 7 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 7.9 in deep (20.9 x 13 x 7.9 in) and clears 17 of 19 airlines instead of 18. Expanded, it flips to gate check on Ryanair. Fly with it zipped shut.
| Airline | Cabin max (in) | Verdict | Under seat |
|---|---|---|---|
| Frontier Airlines | 24 x 16 x 10 | Cabin approved3 in to spare | No |
| Southwest Airlines | 24 x 16 x 10 | Cabin approved3 in to spare | not published |
| Sun Country Airlines | 24 x 16 x 11 | Cabin approved3 in to spare | No |
| Allegiant Air | 22 x 16 x 10 | Cabin approved1.1 in to spare | No |
| British Airways | 22 x 18 x 10 | Cabin approved1.1 in to spare | No |
| Alaska Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| American Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | No |
| Avelo Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | No |
| Delta Air Lines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | not published |
| JetBlue Airways | 22 x 14 x 9 | Cabin approved1 in to spare | No |
| United Airlines | 22 x 14 x 9 | Cabin approved1 in to spare | No |
| Air France | 21.7 x 13.8 x 9.9 | Cabin approved0.8 in to spare | No |
| Emirates | 21.65 x 14.96 x 8.66 | Cabin approved0.8 in to spare | not published |
| Lufthansa | 21.65 x 15.75 x 9.06 | Cabin approved0.8 in to spare | No |
| Ryanair | 21.65 x 15.75 x 7.87 | Cabin approved0.8 in to spare | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Cabin approved0.8 in to spare | No |
| Air Canada | 21.5 x 15.5 x 9 | Tight squeeze0.6 in to spare | No |
| Qatar Airways | 19.69 x 14.57 x 9.84 | Gate check1.2 in over | not published |
Bag spec source: peakdesign.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.
Peak Design lists a separate exterior (external) and interior dimension set for each bag, given in centimeters with the inch equivalent in parentheses. The Travel Backpack sizes are expandable, so the page gives a standard unexpanded exterior and an expanded exterior; the exterior field here stores the standard unexpanded size and expandedDepthIn stores the expanded depth. Travel Duffels do not expand, and none of these bags have wheels or a rigid frame, so the published exterior is the soft bag body.
All 8 Peak Design bags
