Flight
UAL4209
Flight history and live tracking for UAL4209, 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 |
| Observed route | KBFI → KSEA |
Flight history 23 flights since Aug 2025
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-10-03 | KMCI | KORD | 15:43 CDT | 17:10 CDT | 1h 26m | N39726 |
| 2026-09-30 | KBFI BOEING FLD KING CO INTERNATIONAL | KSEA SEATTLE TACOMA INTERNATIONAL | 11:23 PDT | 12:25 PDT | 1h 02m | N17482 |
| 2026-09-26 | KMEM | KMCO | 15:59 CDT | 19:02 EDT | 2h 02m | N497UA |
| 2026-09-20 | KBFI | KSEA | 14:17 PDT | 15:32 PDT | 1h 14m | A760CE |
Earlier flights (19) - back to 2025-08-21
| Date | From | To | Dep | Arr | Duration | Aircraft |
|---|---|---|---|---|---|---|
| 2026-09-01 | KPAE | ? | 13:07 PDT | 23:58Z | 3h 50m | A7F50A |
| 2026-08-15partial | KBFI | ? | 18:02 PDT | N803UA | ||
| 2026-08-13 | KBFI | KSEA | 13:00 PDT | 14:48 PDT | 1h 47m | N47470 |
| 2026-07-18estimated | ? | ? | 21:51Z | 23:18Z | 1h 26m | N804UA |
| 2026-07-15 | KBFI | KSEA | 17:41 PDT | 19:24 PDT | 1h 42m | A5D33B |
| 2026-06-27 | KBFI | KPDX | 10:30 PDT | 11:32 PDT | 1h 01m | A12B32 |
| 2026-05-02estimated | KCDS | KIAH | 08:01 CDT | 08:56 CDT | 0h 54m | N24702 |
| 2026-04-25 | KMCO | ? | 09:27 EDT | 18:08Z | 4h 40m | N12216 |
| 2026-04-23 | KBFI | KSEA | 11:35 PDT | 12:04 PDT | 0h 28m | A12B2B |
| 2026-02-28 | KBFI | KSEA | 10:09 PST | 12:12 PST | 2h 02m | A12AEB |
| 2026-02-13 | KBDL | KIAD | 15:22 EST | 16:38 EST | 1h 15m | N73251 |
| 2026-02-03 | KMSN | KORD | 16:32 CST | 17:12 CST | 0h 39m | N37277 |
| 2026-01-31 | KSEA | KLAS | 12:59 PST | 15:24 PST | 2h 24m | A12AC8 |
| 2026-01-26 | KIND | KCLE | 10:54 EST | 11:40 EST | 0h 45m | N16234 |
| 2025-12-23partial | KSEA | ? | 09:54 PST | A12AE4 | ||
| 2025-10-28estimated | ? | KSFO | 02:55Z | 20:50 PDT | 0h 54m | N14231 |
| 2025-10-01 | ? | KBFI | 00:00Z | 18:03 PDT | 1h 03m | A12AA1 |
| 2025-09-20 | KDEN Denver International | ? | 13:30 MDT | 21:12Z | 1h 41m | A92365 |
| 2025-08-21 | KLAS | KVCV | 14:07 PDT | 14:46 PDT | 0h 39m | N66831 |
Times are local to each airport. Hover for UTC. Flights marked estimated were completed with route prediction or partial coverage; partial records have a confirmed departure but no reliable arrival fix.
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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 archive (from $9.99, with a free one-day sample). Questions: [email protected]