| Alaska Airlines | $35 / $40 | 50 lb (23 kg) | 62 linear inches (length + width + height) |
| Allegiant Air | Varies — $18 to $50 (dynamic — cheapest added during booking, rises before/at the airport) | 40 lb (18 kg) — LOWER than the 50 lb legacy standard | 80 linear inches maximum (larger than the 62in standard, but… |
| American Airlines | $45 / $50 | 50 lb (23 kg) economy; 70 lb (32 kg) premium cabins and elite | 62 linear inches (length + width + height) |
| British Airways | Included in fare (allowance) | 23 kg economy / 32 kg premium | 90 x 75 x 43 cm (35 x 30 x 17 in) including wheels and handl… |
| Delta Air Lines | $45 (no online discount) / $45 | 50 lb (23 kg) Main, Comfort+ and Premium Select; 70 lb (32 kg) Delta One and Fir… | 62 linear inches (length + width + height) |
| Emirates | Included in fare (allowance) | 23 kg economy piece / 32 kg premium and single-bag max | Each bag up to 300 cm (118 inches) total dimensions |
| Frontier Airlines | Varies — $40 to $75 (dynamic — cheapest prepaid 6+ days before departure, most expensive at the airport/gate) | 40 lb (18 kg) — LOWER than the 50 lb standard at other US airlines; this is the … | 62 linear inches (length + width + height), including handle… |
| Hawaiian Airlines | around $40 (North America routes) / around $40 | 50 lb (23 kg) economy; 70 lb (32 kg) premium | 62 linear inches (length + width + height) |
| JetBlue Airways | Varies — $35 to $45 (dynamic — varies by route, date and timing; cheaper prepaid 24h+ ahead) | 50 lb (23 kg) | 62 linear inches (length + width + height) |
| Qatar Airways | Included in fare (allowance) | 23 kg economy piece / 32 kg single-bag max | Standard checked bag up to 300 cm total dimensions |
| Southwest Airlines | $45 / $45 | 50 lb (23 kg) | 62 linear inches (length + width + height), including wheels… |
| Sun Country Airlines | Varies — $30 to $50 (dynamic — cheapest prepaid during booking, rises before/at the airport) | 50 lb (23 kg) | 62 linear inches (length + width + height) |
| Turkish Airlines | Included in fare (allowance) | 23 kg economy piece / 32 kg single-bag max | Standard checked bag limits apply; oversized items charged s… |
| United Airlines | $40 / $45 | 50 lb (23 kg) economy; 70 lb (32 kg) premium cabins | 62 linear inches (length + width + height) |