Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL639

Operated by UAL

Live map

Live map filtered to UAL639. Shown when the flight is currently airborne.

Route airports View route page →

Departure

BOS KBOS VFR

Boston Logan International Airport

Boston, US

Local time
19:50 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
20 ft
Coordinates
42.3620, -71.0079

cloud Weather

Wind
240° / 13G20 kt
Visibility
10 SM
Ceiling
OVC 25,000 ft
Temp / Dew
31°C / 21°C
Altimeter
29.79 inHg

Obs: 2026-07-14T22:54:00.000Z

Raw METAR / TAF 
METAR KBOS 142254Z 24013G20KT 10SM OVC250 31/21 A2979 RMK AO2 SLP086 FU OVC250 T03110206 $

TAF KBOS 142320Z 1500/1606 25012G22KT P6SM OVC250 FM150300 25010G18KT P6SM SKC FM151000 29011KT P6SM FEW250 FM151200 30011G20KT P6SM SCT200 FM160400 31010KT P6SM FEW200

flight Live Traffic

flight_takeoff 212 Departures
flight_land 198 Arrivals

Arrival

LAX KLAX VFR

Los Angeles International Airport

Los Angeles, US

Local time
16:50 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
125 ft
Coordinates
33.9425, -118.4080

cloud Weather

Wind
250° / 12 kt
Visibility
10 SM
Ceiling
FEW 8,000 ft
Temp / Dew
24°C / 17°C
Altimeter
29.90 inHg

Obs: 2026-07-14T22:53:00.000Z

Raw METAR / TAF 
METAR KLAX 142253Z 25012KT 10SM FEW080 24/17 A2990 RMK AO2 SLP125 T02440172 $

TAF KLAX 142325Z 1500/1606 26012KT P6SM FEW080 FM150500 26007KT P6SM SKC FM151000 VRB03KT P6SM SCT006 FM151600 24006KT P6SM FEW006 FM152000 26012KT P6SM SKC FM160300 26006KT P6SM SKC

warning FAA Advisories

  • Closed: !LAX 05/277 LAX AD AP CLSD TO NON SKED TRANSIENT GA ACFT EXC 24HR PPR CTC ATLANTIC AVIATION 310-258-9884 OR SIGNATURE AVIATION 310-410-9605 2605271826-2705281600 (May 27 at 18:26 UTC. – May 28 at 16:00 UTC.)

flight Live Traffic

flight_takeoff 333 Departures
flight_land 365 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-13 A44939 - Jul 13, 23:00 UTCJul 14, 04:05 UTC5h 5m - -
2026-07-13 A12AC3 - Jul 13, 00:20 UTCJul 13, 05:31 UTC5h 10m - -
2026-07-11 A449A4 - Jul 11, 23:40 UTCJul 12, 04:55 UTC5h 15m - -
2026-07-11 A449CB - Jul 11, 00:30 UTCJul 11, 06:01 UTC5h 30m - -
2026-07-11 A449CB BOS → LAX Jul 11, 00:19 UTCJul 11, 05:55 UTC5h 36m +113m +15m
2026-07-10 A445A4 - Jul 10, 00:40 UTCJul 10, 06:35 UTC5h 55m - -
2026-07-09 A445A4 BOS → LAX Jul 9, 23:47 UTCJul 10, 06:26 UTC6h 39m +81m -49m
2026-07-08 AA7F46 - Jul 8, 23:15 UTCJul 9, 04:40 UTC5h 25m - -
2026-07-07 A5D6F9 - Jul 7, 23:15 UTCJul 8, 04:40 UTC5h 25m - -
2026-07-06 A448D6 - Jul 6, 23:00 UTCJul 7, 04:25 UTC5h 25m - -
2026-07-06 A2BBF2 - Jul 6, 00:40 UTCJul 6, 06:05 UTC5h 25m - -
2026-07-05 A2BBF2 BOS → LAX Jul 5, 22:55 UTCJul 6, 05:59 UTC7h 4m +19m -122m
2026-07-04 ABFBD0 - Jul 4, 16:00 UTCJul 4, 20:25 UTC4h 25m - -
2026-07-03 AA7F06 - Jul 3, 23:05 UTCJul 4, 04:50 UTC5h 45m - -
2026-07-03 AA7F06 BOS → BOS Jul 3, 22:35 UTCJul 3, 22:40 UTC5m - -
2026-07-02 A12AE6 - Jul 2, 23:20 UTCJul 3, 05:00 UTC5h 40m - -
2026-07-02 A12AE6 BOS → BOS Jul 2, 22:55 UTCJul 2, 23:00 UTC5m - -
2026-07-01 A2B7F5 - Jul 1, 23:05 UTCJul 2, 04:45 UTC5h 40m - -
2026-06-30 A12AE6 - Jun 30, 23:10 UTCJul 1, 04:45 UTC5h 35m - -
2026-06-30 A12AE6 - Jun 30, 00:00 UTCJun 30, 05:30 UTC5h 31m - -
2026-06-30 A12AE6 BOS → LAX Jun 30, 00:04 UTCJun 30, 05:21 UTC5h 17m +97m -4m
2026-06-28 AA7F46 - Jun 28, 23:20 UTCJun 29, 05:00 UTC5h 40m - -
2026-06-27 A12A7B - Jun 27, 22:45 UTCJun 28, 04:35 UTC5h 50m - -
2026-06-26 A12E80 - Jun 26, 22:44 UTCJun 27, 04:44 UTC6h 0m - -
2026-06-25 A12E80 - Jun 25, 22:49 UTCJun 26, 04:50 UTC6h 0m - -
2026-06-24 A449CB BOS → LAX Jun 24, 22:45 UTCJun 25, 04:21 UTC5h 36m +19m -2m
2026-06-24 A449CB - Jun 24, 22:39 UTCJun 25, 04:29 UTC5h 50m - -
2026-06-23 A448D3 - Jun 23, 23:44 UTCJun 24, 05:24 UTC5h 40m - -
2026-06-23 A448D3 BOS → LAX Jun 23, 23:36 UTCJun 24, 05:18 UTC5h 42m +70m +2m
2026-06-22 A4491A - Jun 22, 23:35 UTCJun 23, 05:15 UTC5h 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

Where does flight UAL639 fly?
UAL639 (UAL) flies from BOS to LAX. View the full route page.
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.