Best carry-on size for US airlines
The carry-on size that fits the overhead bin across US airlines.
Best cabin bag size
55 × 35 × 22 cm
21.7 × 13.8 × 8.7 in · up to 11 kg
largest × middle × shortest side
Fits the cabin bag allowance on all 13 airlines in this group. The tightest is Avelo Airlines.
Bags that fit
Decathlon (Forclaz)
Travel 500 Cabin 40L
50 × 35 × 20 cm
40 L
1.4 kg
0 cm to spare
from £45View →
Antler
Clifton Cabin
55 × 35 × 20 cm
33 L
2.9 kg
0 cm to spare
from £130
Peak Design
Travel Backpack 30L
51 × 33 × 22 cm
30 L
1.9 kg
0 cm to spare
from $230
cabin bag limit per airline (13)
| Airline | Limit | Weight |
|---|---|---|
| Avelo Airlines | 55 × 35 × 22 cm | — |
 United Airlines | 56 × 35 × 22 cm | — |
| JetBlue | 56 × 35 × 22 cm | — |
 Delta Air Lines | 56 × 35 × 23 cm | — |
 American Airlines | 56 × 36 × 23 cm | — |
| Alaska Airlines | 56 × 36 × 23 cm | — |
| Hawaiian Airlines | 56 × 36 × 23 cm | 11 kg |
| Breeze Airways | 56 × 36 × 23 cm | — |
| Allegiant Air | 56 × 41 × 25 cm | — |
 Southwest Airlines | 61 × 41 × 25 cm | — |
| Frontier Airlines | 61 × 41 × 25 cm | 16 kg |
| Spirit Airlines | 56 × 46 × 25 cm | — |
| Sun Country | 61 × 41 × 28 cm | — |
FAQ
What is the best cabin bag size for this group?+
A bag no larger than 55 × 35 × 22 cm (21.7 × 13.8 × 8.7 in), up to 11 kg fits the cabin bag allowance on all 13 airlines in this group — the limit is set by Avelo Airlines.
Why not just buy the biggest bag?+
Because the strictest airline in the group wins. A bag that fits Avelo Airlines fits everyone here; a larger one would be rejected or charged there. Buy for the tightest limit and you’re safe on all.
Should I leave a safety margin?+
Yes — measure with wheels and handles, and pick a bag a touch under the limit. A packed bag bulges, and low-cost airlines measure strictly at the gate.