Flight
UAL1577 4 May 2026
UAL1577, operated by United Airlines, on 4 May 2026: San Francisco International (KSFO) to Chicago Ohare International (KORD). Scheduled and actual times are local to each airport (hover for UTC).
Flight
PlaneTrack receiver network| Route | KSFO SAN FRANCISCO INTERNATIONAL → KORD CHICAGO OHARE INTERNATIONAL |
| Status | Completed (receiver network) |
| First seen airborne | 19:33 PDT 3 May |
| Last seen | 10:32 CDT |
| Duration | 12h 58m |
| Aircraft | N27509 |
| Max altitude | 33,000 ft |
| Distance tracked | 1,600 nm |
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.