Delsey Paris Helium DLX Wheeled Underseater: 15.25 x 14.25 x 9 in
underseat / personal item, softside, 4 spinner wheels, 5.05 lb empty. Exterior figures are the maker's own, wheels and handles included.
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.
As an Amazon Associate we earn from qualifying purchases. Links are affiliate links; it costs you nothing extra.
Does the Helium DLX fit? All 19 airlines
15.25 x 14.25 x 9 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 approved1.8 in to spare | No |
| Allegiant Air | 22 x 16 x 10 | Cabin approved1 in to spare | No |
| British Airways | 22 x 18 x 10 | Cabin approved1 in to spare | No |
| Frontier Airlines | 24 x 16 x 10 | Cabin approved1 in to spare | No |
| Southwest Airlines | 24 x 16 x 10 | Cabin approved1 in to spare | not published |
| 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 | Tight squeeze0.1 in to spare | No |
| Turkish Airlines | 21.65 x 15.75 x 9.06 | Tight squeeze0.1 in to spare | No |
| Air Canada | 21.5 x 15.5 x 9 | Tight squeeze0 in to spare | No |
| Alaska Airlines | 22 x 14 x 9 | Gate check0.2 in over | not published |
| American Airlines | 22 x 14 x 9 | Gate check0.2 in over | No |
| Avelo Airlines | 22 x 14 x 9 | Gate check0.2 in over | No |
| Delta Air Lines | 22 x 14 x 9 | Gate check0.2 in over | not published |
| Hawaiian Airlines | 22 x 14 x 9 | Gate check0.2 in over | not published |
| JetBlue Airways | 22 x 14 x 9 | Gate check0.2 in over | No |
| United Airlines | 22 x 14 x 9 | Gate check0.2 in over | No |
| Emirates | 21.65 x 14.96 x 8.66 | Gate check0.3 in over | not published |
| Air France | 21.7 x 13.8 x 9.9 | Gate check0.4 in over | No |
| Ryanair | 21.65 x 15.75 x 7.87 | Gate check1.1 in over | No |
Bag spec source: us.delsey.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.
Delsey's US site (us.delsey.com) states all dimensions natively in inches; no cm figures were seen on any US product page fetched for this dataset. Most product pages publish one 'Exterior dimensions (includes wheels and handles)' figure alongside a smaller 'Interior dimensions' figure for packing capacity, and do not separately publish a wheels-and-handles-excluded body size, so the exterior figure is the overall, gate-relevant measurement and bodyOnly is null for every entry here.
All 15 Delsey Paris bags
