| Tail Number / N-Number | N668UA |
| Manufacturer | BOEING |
| Model | 767-322 |
| Year Built | 1999 |
| Manufacturer's Serial Number | 30024 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 330 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | P&W |
| Engine Model | PW4000 SER |
| Engine Type | Turbo-jet |
| Number of Engines | 2 engines |
| Thrust per Engine | 60,000 pounds-force (266.9 kN) |
| Total Thrust | 120,000 pounds-force (533.8 kN) |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIRLINES INC |
| Street | ATTN: TREASURER WILLIS TOWER 233 S WACKER DR |
| City | CHICAGO |
| State | IL |
| Zip Code | 60606-7147 |
| Region | Great Lakes |
| County | Cook County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1999-03-14 |
| Certificate Issue Date | 2013-04-01 |
| Last Action Date | 2021-11-30 |
| Expiration Date | 2029-04-30 |
| Status | Valid Registration |
| Mode S Code | 52151664 |
| Mode S Code Hex | A8D3B4 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N668UA.
| Tail Number / N-Number | N668UA |
| Manufacturer | BOEING |
| Model | 767-322 |
| Manufacturer's Serial Number | 27210 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 330 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| County | Cook County |
| Last Action Date | 1993-02-19 |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1995-05-08 |