| Aircraft | In  service | Orders | Passengers | Notes | 
|---|
| J | F | W | Y+ | Y | Total | Refs | 
|---|
| Airbus A319-100 | 81 | — | — | 12 | — | 36 | 78 | 126 |  | Retiring 21 older aircraft early in 2025. | 
| Airbus A320-200 | 76 | — | — | 12 | — | 42 | 96 | 150 |  | 
| Airbus A321neo | 38 | 164 | — | 20 | — | 57 | 123 | 200 |  | Deliveries until 2032. | 
| Airbus A321XLR | — | 50 | TBA | Deliveries start in January 2026.Replacing Boeing 757-200. | 
| Airbus A350-900 | — | 45 | TBA | Deliveries pushed back by United until at least 2030.Replacing international Boeing 777-200ER. | 
| Boeing 737-700 | 40 | — | — | 12 | — | 36 | 78 | 126 |  |  | 
| Boeing 737-800 | 141 | — | — | 16 | — | 48 | 102 | 166 |  |  | 
| 42 | 108 | 
| 54 | 96 | 
| Boeing 737-900 | 12 | — | — | 20 | — | 45 | 114 | 179 |  |  | 
| Boeing 737-900ER | 136 | — | — | 20 | — | 45 | 114 | 179 |  |  | 
| 42 | 117 | 
| 39 | 120 | 
| Boeing 737 MAX 8 | 123 | — | — | 16 | — | 54 | 96 | 166 |  |  | 
| Boeing 737 MAX 9 | 103 | 120 | — | 20 | — | 45 | 114 | 179 |  | Largest operator. | 
| Boeing 737 MAX 10 | — | 167 | — | 20 | — | 64 | 105 | 189 |  | Launch customer.Production halted amid certification uncertainties; orders may be converted to MAX 8 or 9. | 
| 22 | — | 45 | 96 | 163 |  | 
| Boeing 757-200 | 39 | — | 16 | — | — | 42 | 118 | 176 |  | To be replaced by Airbus A321XLR. | 
| Boeing 757-300 | 21 | — | — | 24 | — | 54 | 156 | 234 |  | Largest operator. | 
| Boeing 767-300ER | 13 | — | 30 | — | 24 | 32 | 113 | 199 |  | To be replaced by Boeing 787 by 2030. | 
| 24 | 46 | 22 | 43 | 56 | 167 | 
| Boeing 767-400ER | 16 | — | 34 | — | 24 | 48 | 125 | 231 |  | 
| Boeing 777-200 | 19 | — | — | 28 | — | 102 | 234 | 364 |  | Launch customer and largest operator.Domestic configuration.To be replaced by Boeing 787. | 
| Boeing 777-200ER | 51 | — | 50 | — | 24 | 46 | 156 | 276 |  | Largest operator.International configuration.To be replaced by Airbus A350-900. | 
| 4 | — | 32 | — | 124 | 206 | 362 | Domestic configuration.To be replaced by Boeing 787. | 
| Boeing 777-300ER | 22 | — | 60 | — | 24 | 62 | 204 | 350 |  |  | 
| Boeing 787-8 | 12 | — | 28 | — | 21 | 36 | 158 | 243 |  | Order with 50 options.Replacing Boeing 767, Boeing 777-200, and domestic Boeing 777-200ER. | 
| Boeing 787-9 | 45 | 143 | 48 | — | 21 | 39 | 149 | 257 |  | 
| — | 64 | — | 35 | 33 | 90 | 222 |  | 
| Boeing 787-10 | 21 | — | 44 | — | 21 | 54 | 199 | 318 |  | 
| Total | 1,037 | 689 |  | 
|---|