Measure it once. We’ll check it against the under-seat and overhead-bin limit of all 11 major US airlines at the same time — and we turn the bag, so a 9 × 22 × 14 bag correctly passes a 22 × 14 × 9 limit.
Measure the outside, wheels and handles included — that’s what they measure at the gate.
| Airline | Under-seat limit | Your bag | Overhead limit | Your bag |
|---|---|---|---|---|
| American Airlines | 18 × 14 × 8 | — | 22 × 14 × 9 | — |
| Delta Air Lines | Not published | — | 22 × 14 × 9 max 45 linear |
— |
| United Airlines | 17 × 10 × 9 | — | 22 × 14 × 9 | — |
| Southwest Airlines | Not published | — | 24 × 16 × 10 | — |
| Alaska Airlines | Not published | — | 22 × 14 × 9 max 45 linear |
— |
| JetBlue | 17 × 13 × 8 | — | 22 × 14 × 9 | — |
| Hawaiian Airlines | Not published | — | 22 × 14 × 9 max 45 linear |
— |
| Frontier Airlines | 18 × 14 × 8 | — | 24 × 16 × 10 | — |
| Allegiant Air | 18 × 14 × 8 | — | 22 × 16 × 10 | — |
| Breeze Airways | 17 × 13 × 8 | — | 22 × 14 × 9 | — |
| Sun Country Airlines | 17 × 13 × 9 | — | 24 × 16 × 11 | — |
| Airline | Under-seat limit | Your bag | Cabin limit | Your bag |
|---|---|---|---|---|
| Ryanair | 15.7 × 11.8 × 7.9 | — | 21.7 × 15.7 × 7.9 10 kg |
— |
| easyJet | 17.7 × 14.2 × 7.9 | — | 22 × 17.7 × 9.8 15 kg |
— |
| British Airways | 16 × 12 × 6 | — | 22 × 18 × 10 | — |
| Lufthansa | 15.7 × 11.8 × 5.9 | — | 21.7 × 15.7 × 9.1 8 kg |
— |
| Air France | 16 × 12 × 6 | — | 21.7 × 13.8 × 9.9 12 kg |
— |
| KLM | 15.7 × 11.8 × 5.9 | — | 21.7 × 13.8 × 9.8 12 kg |
— |
| Aer Lingus | 13 × 9.8 × 7.9 | — | 21.7 × 15.7 × 9.4 10 kg |
— |
| Virgin Atlantic | Not published | — | 22 × 14.2 × 9 10 kg |
— |
| Iberia | 15.7 × 11.8 × 5.9 | — | 22 × 15.7 × 9.8 10 kg |
— |
| Turkish Airlines | 15.7 × 11.8 × 5.9 | — | 21.7 × 15.7 × 9.1 8 kg |
— |
| Emirates | Not published | — | 21.7 × 15 × 8.7 7 kg |
— |
| Qatar Airways | Not published | — | 19.7 × 14.6 × 9.8 7 kg |
— |
| Air Canada | 17 × 13 × 6 | — | 21.5 × 15.5 × 9 | — |
| WestJet | 16 × 13 × 6 | — | 22 × 14 × 9 | — |
| Avianca | 18 × 14 × 8 | — | 22 × 14 × 10 10 kg |
— |
| Copa Airlines | 17 × 10 × 9 | — | 22 × 14 × 10 10 kg |
— |
Weight is the other half of the answer on these carriers and this tool does not check it — Emirates and Qatar allow 7 kg, Lufthansa and Turkish 8 kg. See the international page for the weight limits and the fare-class catches.
All dimensions in inches, wheels and handles included. Delta, Southwest, Alaska and Hawaiian publish no personal item size — those rows are scored against our own working figure, which is why they show a note rather than a number.
Both boxes are sorted largest-to-smallest before they are compared. That is the correct test for passing a rectangular box through a rectangular opening, and it is where most size checkers go wrong — comparing the numbers in the order you happened to type them rejects bags that genuinely fit.
A soft-sided bag compresses into a sizer; a hard shell does not. Bags marked borderline are within an inch of the limit, and the construction toggle changes how much slack we allow.
Every US airline measures the outside of the bag. Measure it packed and at its widest, including any external pocket that bulges when full.
Delta caps carry-ons at 45 linear inches — length plus width plus height combined — on top of the box dimensions. A bag can pass every individual dimension and still fail that total, so it is checked separately.
Measure the outside at its widest points with the bag packed, including wheels, handles, straps and any external pockets. Airlines measure the outside of the bag, not the case. This is why a suitcase sold as a "20-inch carry-on" is often 22 inches overall.
No. We sort your dimensions and the airline’s limit before comparing them, because a bag can be turned. A 9 × 22 × 14 inch bag genuinely fits a 22 × 14 × 9 inch limit — it is the same box. Some size checkers compare the numbers in the order you typed them and wrongly reject bags that fit.
The bag is over the limit by less than an inch. A soft-sided bag usually compresses into a sizer at that margin; a hard shell usually will not. We allow a wider margin for soft bags than rigid ones for exactly that reason, which is why the construction toggle changes the answer.
United, whose personal item limit of 17 × 10 × 9 inches is the tightest in the country. The 10-inch width is the binding constraint and rules out most mainstream bags.
Yes, on every US airline without exception. Wheels, handles, straps and external pockets all count toward the measurement.
Manufacturers publish dimensions inconsistently, and a “20-inch” spinner is almost never 20 inches once you count the wheels. Where a brand states dimensions including wheels and handles, that’s the number we use. Where it only publishes the case, we say so on the card. Airlines measure the outside of your bag — wheels, handles, straps and all. Anything marked borderline is down to the gate agent, and remember that a soft bag squashes into a sizer while a hard shell won’t.
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Limits verified August 2026 against each carrier’s published policy. Airlines change these without notice — always confirm before you fly. Spirit Airlines ceased operations on 2 May 2026 and is no longer listed.
Airline Bag Size Checker v1.0.15 · last updated 2026-08-12