| Tail Number / N-Number | N2644U |
| Manufacturer | BOEING |
| Model | 777-300ER |
| Year Built | 2017 |
| Manufacturer's Serial Number | 63724 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 552 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | GE |
| Engine Model | GE90-115B |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 115,540 pounds-force (513.9 kN) |
| Total Thrust | 231,080 pounds-force (1,027.9 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIRLINES INC |
| Street | 233 SOUTH WACKER DRIVE |
| City | CHICAGO |
| State | IL |
| Zip Code | 60606 |
| Region | Great Lakes |
| County | Cook County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2017-06-26 |
| Certificate Issue Date | 2017-06-28 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 50510320 |
| Mode S Code Hex | A290D0 |