Flight
UAL521
Flight history and live tracking for UAL521, operated by United Airlines. Recent flights from the PlaneTrack independent receiver network, with departure and arrival times, aircraft used, and a real-time position feed.
Route
| Airline | United Airlines |
| Typical origin | KIAH GEORGE BUSH INTCNTL HOUSTON |
| Typical destination | KBOS GENERAL EDWARD LAWRENCE LOGAN INTERNATIONAL |
| Distance | 1,387 nm |
Last 30 days
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-08-17estimated | KIAH | KBOS | 19:40 CDT | 09:12 EDT | 12h 31m | N17437 |
| 2026-08-16estimated | KIAH | KBOS | 19:00 CDT | 22:56 EDT | 2h 56m | N77584 |
| 2026-07-23 | KIAH | KBOS | 19:04 CDT | 23:18 EDT | 3h 13m | N37555 |
| 2026-07-22 | KIAH | KBOS | 19:15 CDT | 23:28 EDT | 3h 13m | N27509 |
Times are local to each airport. Hover for UTC. Flights marked estimated were completed with route prediction or partial coverage.
Data access
Live positions and 365-day history for this flight are available through the PlaneTrack API (commercial use from $29/month) and as one-off CSV extracts from our own receiver network archive. Questions: [email protected]