UAL639 is operated by UNITED AIRLINES INC between General Edward Lawrence Logan International Airport (KBOS) and Los Angeles International Airport (KLAX). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 5h 31m. SkyMeter has observed 86 legs of this flight number via ADS-B.

✈
FLIGHTS
86
last 90 days
⏱
AVG DURATION
5h 31m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/20/2026
first → last seen
🗺
ROUTES / TYPES
8 / 4
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

6
KBOS → KLAX
71
avg 6h 0m · General Edward Lawrence Logan → Los Angeles
KRNO → KSFO
6
avg 1h 21m · Reno Tahoe → San Francisco
KBOS → KBUR
1
avg 6h 0m · General Edward Lawrence Logan → Bob Hope
3MA7 → KLAX
1
avg 6h 17m · Gear Plant Heliport → Los Angeles
KSFO → KCMH
1
avg 5h 0m · San Francisco → John Glenn Columbus
US-0568 → KLAX
1
avg 5h 35m · Tailwind Boston Seaplane Base → Los Angeles

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
199
A320 AIRBUS Airbus A320
5
B739 BOEING Boeing 737-900
2
A319 AIRBUS Airbus A319
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of UAL639

30
N454UAAIRBUS Airbus A320
→
08/20/2026
1h 41m
No alerts
Replay Analysis
N435UAAIRBUS Airbus A320
→
08/17/2026
1h 12m
No alerts
Replay Analysis
N495UAAIRBUS Airbus A320
→
08/16/2026
1h 12m
No alerts
Replay Analysis
N493UAAIRBUS Airbus A320
→
08/15/2026
1h 14m
No alerts
Replay Analysis
N495UAAIRBUS Airbus A320
→
08/14/2026
1h 12m
No alerts
Replay Analysis
N37420BOEING Boeing 737-900
→
08/12/2026
1h 31m
No alerts
Replay Analysis
N77559BOEING Boeing 737 MAX 9
→
08/11/2026
4h 55m
No alerts
Replay Analysis
N77559BOEING Boeing 737 MAX 9
→
08/10/2026
55m
No alerts
Replay Analysis
N77559BOEING Boeing 737 MAX 9
→
08/10/2026
5h 51m
No alerts
Replay Analysis
N37548BOEING Boeing 737 MAX 9
→
08/10/2026
5h 2m
No alerts
Replay Analysis
N37548BOEING Boeing 737 MAX 9
→
08/09/2026
40m
No alerts
Replay Analysis
N37548BOEING Boeing 737 MAX 9
→
08/09/2026
5h 43m
No alerts
Replay Analysis
N97424BOEING Boeing 737 MAX 9
→
08/09/2026
5h 50m
No alerts
Replay Analysis
N17566BOEING Boeing 737 MAX 9
→
08/08/2026
5h 9m
No alerts
Replay Analysis
N17566BOEING Boeing 737 MAX 9
→
08/07/2026
1h 9m
No alerts
Replay Analysis
N17566BOEING Boeing 737 MAX 9
→
08/07/2026
6h 19m
No alerts
Replay Analysis
N17460BOEING Boeing 737 MAX 9
→
08/07/2026
5h 0m
No alerts
Replay Analysis
N17460BOEING Boeing 737 MAX 9
→
08/06/2026
41m
No alerts
Replay Analysis
N17460BOEING Boeing 737 MAX 9
→
08/06/2026
5h 42m
No alerts
Replay Analysis
N17431BOEING Boeing 737 MAX 9
→
08/06/2026
5h 2m
No alerts
Replay Analysis
N17431BOEING Boeing 737 MAX 9
→
08/05/2026
1h 8m
No alerts
Replay Analysis
N17431BOEING Boeing 737 MAX 9
→
08/05/2026
6h 11m
No alerts
Replay Analysis
N37450BOEING Boeing 737 MAX 9
→
08/05/2026
4h 55m
No alerts
Replay Analysis
N37450BOEING Boeing 737 MAX 9
→
08/04/2026
46m
No alerts
Replay Analysis
N37450BOEING Boeing 737 MAX 9
→
08/04/2026
5h 42m
No alerts
Replay Analysis
N27539BOEING Boeing 737 MAX 9
→
08/04/2026
5h 40m
No alerts
Replay Analysis
N17435BOEING Boeing 737 MAX 9
→
08/03/2026
5h 40m
No alerts
Replay Analysis
N38417BOEING Boeing 737-900
→
08/02/2026
3h 45m
No alerts
Replay Analysis
N17408BOEING Boeing 737 MAX 9
→
08/01/2026
5h 21m
No alerts
Replay Analysis
N17408BOEING Boeing 737 MAX 9
→
07/31/2026
5h 41m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window