| Airlines | Dimensions | |
|---|---|---|
| (in) | (cm) | |
| American Airlines | 18 x 14 x 8 in | 45 x 35 x 20 cm |
| Delta Air Lines | 18 x 14 x 8 in | 45 x 35 x 20 cm |
| Frontier Airlines | 18 x 14 x 8 in | 45 x 35 x 20 cm |
| JetBlue Airlines | 17 x 13 x 8 in | 43 x 33 x 20 cm |
| Southwest Airlines | 18 x 13 x 8 in | 45 x 33 x 20 cm |
| Spirit Airlines | 18 x 14 x 8 in | 45 x 35 x 20 cm |
| United Airlines | 17 x 10 x 9 in | 43 x 25 x 22 cm |
| Minimum | 17 x 10 x 8 in | 43 x 25 x 20 cm |
| Maximum | 18 x 14 x 8 in | 45 x 35 x 20 cm |
| Mode | 18 x 14 x 8 in | 45 x 35 x 20 cm |
Last updated June 2024. Always confirm up-to-date size restrictions with airline prior to flight!