flight_takeoff Flight
UAL639
Live map
Recent history last 30
| Date | Aircraft | Route | Takeoff | Landing | Duration | Dep Δ | Arr Δ |
|---|---|---|---|---|---|---|---|
| 2026-07-13 | A44939 | - | Jul 13, 23:00 UTC | Jul 14, 04:05 UTC | 5h 5m | - | - |
| 2026-07-13 | A12AC3 | - | Jul 13, 00:20 UTC | Jul 13, 05:31 UTC | 5h 10m | - | - |
| 2026-07-11 | A449A4 | - | Jul 11, 23:40 UTC | Jul 12, 04:55 UTC | 5h 15m | - | - |
| 2026-07-11 | A449CB | - | Jul 11, 00:30 UTC | Jul 11, 06:01 UTC | 5h 30m | - | - |
| 2026-07-11 | A449CB | BOS → LAX | Jul 11, 00:19 UTC | Jul 11, 05:55 UTC | 5h 36m | +113m | +15m |
| 2026-07-10 | A445A4 | - | Jul 10, 00:40 UTC | Jul 10, 06:35 UTC | 5h 55m | - | - |
| 2026-07-09 | A445A4 | BOS → LAX | Jul 9, 23:47 UTC | Jul 10, 06:26 UTC | 6h 39m | +81m | -49m |
| 2026-07-08 | AA7F46 | - | Jul 8, 23:15 UTC | Jul 9, 04:40 UTC | 5h 25m | - | - |
| 2026-07-07 | A5D6F9 | - | Jul 7, 23:15 UTC | Jul 8, 04:40 UTC | 5h 25m | - | - |
| 2026-07-06 | A448D6 | - | Jul 6, 23:00 UTC | Jul 7, 04:25 UTC | 5h 25m | - | - |
| 2026-07-06 | A2BBF2 | - | Jul 6, 00:40 UTC | Jul 6, 06:05 UTC | 5h 25m | - | - |
| 2026-07-05 | A2BBF2 | BOS → LAX | Jul 5, 22:55 UTC | Jul 6, 05:59 UTC | 7h 4m | +19m | -122m |
| 2026-07-04 | ABFBD0 | - | Jul 4, 16:00 UTC | Jul 4, 20:25 UTC | 4h 25m | - | - |
| 2026-07-03 | AA7F06 | - | Jul 3, 23:05 UTC | Jul 4, 04:50 UTC | 5h 45m | - | - |
| 2026-07-03 | AA7F06 | BOS → BOS | Jul 3, 22:35 UTC | Jul 3, 22:40 UTC | 5m | - | - |
| 2026-07-02 | A12AE6 | - | Jul 2, 23:20 UTC | Jul 3, 05:00 UTC | 5h 40m | - | - |
| 2026-07-02 | A12AE6 | BOS → BOS | Jul 2, 22:55 UTC | Jul 2, 23:00 UTC | 5m | - | - |
| 2026-07-01 | A2B7F5 | - | Jul 1, 23:05 UTC | Jul 2, 04:45 UTC | 5h 40m | - | - |
| 2026-06-30 | A12AE6 | - | Jun 30, 23:10 UTC | Jul 1, 04:45 UTC | 5h 35m | - | - |
| 2026-06-30 | A12AE6 | - | Jun 30, 00:00 UTC | Jun 30, 05:30 UTC | 5h 31m | - | - |
| 2026-06-30 | A12AE6 | BOS → LAX | Jun 30, 00:04 UTC | Jun 30, 05:21 UTC | 5h 17m | +97m | -4m |
| 2026-06-28 | AA7F46 | - | Jun 28, 23:20 UTC | Jun 29, 05:00 UTC | 5h 40m | - | - |
| 2026-06-27 | A12A7B | - | Jun 27, 22:45 UTC | Jun 28, 04:35 UTC | 5h 50m | - | - |
| 2026-06-26 | A12E80 | - | Jun 26, 22:44 UTC | Jun 27, 04:44 UTC | 6h 0m | - | - |
| 2026-06-25 | A12E80 | - | Jun 25, 22:49 UTC | Jun 26, 04:50 UTC | 6h 0m | - | - |
| 2026-06-24 | A449CB | BOS → LAX | Jun 24, 22:45 UTC | Jun 25, 04:21 UTC | 5h 36m | +19m | -2m |
| 2026-06-24 | A449CB | - | Jun 24, 22:39 UTC | Jun 25, 04:29 UTC | 5h 50m | - | - |
| 2026-06-23 | A448D3 | - | Jun 23, 23:44 UTC | Jun 24, 05:24 UTC | 5h 40m | - | - |
| 2026-06-23 | A448D3 | BOS → LAX | Jun 23, 23:36 UTC | Jun 24, 05:18 UTC | 5h 42m | +70m | +2m |
| 2026-06-22 | A4491A | - | Jun 22, 23:35 UTC | Jun 23, 05:15 UTC | 5h 40m | - | - |
Performance history
- Flights tracked
- 127 showing last 30
- Avg arrival delay
- -27m
- On-time arrival
- 100% 100% on time
- Aircraft used
- 17
Monthly activity 4 months
| Month | Flights tracked |
|---|---|
| July 2026 | 18 |
| June 2026 | 37 |
| May 2026 | 36 |
| April 2026 | 36 |
UAL639 frequently asked
How long is flight UAL639?
Based on observed flights, UAL639 takes on average 5h 16m from takeoff to landing.
How often does UAL639 fly?
UAL639 has been observed flying several times a week in our tracking data. We've recorded 127 flights under this callsign.
Is flight UAL639 usually on time?
Across recent flights, UAL639 arrives 27 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL639?
UAL639 has been operated by 17 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL639 live?
Yes. When UAL639 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.