Flight
UAL1577 17 Jun 2026
UAL1577, operated by United Airlines, on 17 Jun 2026: San Francisco International (KSFO) to Seattle Tacoma International (KSEA), 3 legs. Scheduled and actual times are local to each airport (hover for UTC).
Leg 1 of 3estimated
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → KSEA SEATTLE TACOMA INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 18:46 PDT 16 Jun |
| Last seen | 20:46 PDT 16 Jun |
| Duration | 1h 59m |
| Aircraft | N448UA |
| Max altitude | 34,000 ft |
| Distance tracked | 590 nm |
Leg 2 of 3
PlaneTrack receiver network| Route | KATL THE WILLIAM B HARTSFIELD ATLANTA INTERNATIONAL → KORD CHICAGO OHARE INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 08:12 EDT |
| Last seen | 11:08 CDT |
| Duration | 3h 56m |
| Aircraft | N448UA |
| Max altitude | 36,000 ft |
| Distance tracked | 527 nm |
Leg 3 of 3estimated
PlaneTrack receiver network| Route | Route not recorded |
| Status | Completed (receiver network) |
| First seen airborne | 16:40Z |
| Last seen | 23:42Z |
| Duration | 7h 01m |
| Aircraft | N77867 |
| Max altitude | 32,125 ft |
Punctuality, last 30 days
| Flights | 19 |
| On time | 5 (26%) |
| Average delay | -23 min |
| Worst delay | +291 min |
In the last 30 days UAL1577 departed on time (within 15 minutes) on 5 of 19 flights (26%), with an average departure delay of -23 min and a worst delay of +291 min.
Schedule, departure and arrival times from the FAA SWIM feed; aircraft, altitude and distance from the PlaneTrack receiver network. On time means a departure within 15 minutes of schedule.