UAL3900

UNITED AIRLINES INC · SFO → LAX

UAL3900 is operated by UNITED AIRLINES INC between San Francisco International Airport (KSFO) and Los Angeles International Airport (KLAX). The flight is most often flown by a BOEING Boeing 787-8 BBJ/Dreamliner. Typical block time is 4h 36m. SkyMeter has observed 6 legs of this flight number via ADS-B.

✈
FLIGHTS
6
last 90 days
⏱
AVG DURATION
4h 36m
tracked time
📅
SERVICE PERIOD
04/28/2026 → 06/01/2026
first → last seen
🗺
ROUTES / TYPES
6 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

4
KSFO → KLAX
1
avg 1h 37m · San Francisco → Los Angeles
PHNL → KEWR
1
avg 9h 11m · Daniel K Inouye → Newark Liberty
KSAN → KORD
1
avg 3h 37m · San Diego → Chicago O'Hare
KDEN → KORD
1
avg 2h 11m · Denver → Chicago O'Hare

Aircraft types

Equipment used on this number

5
B788 BOEING Boeing 787-8 BBJ/Dreamliner
4
B764 BOEING Boeing 767-400
3
B739 BOEING Boeing 737-900
2
B752 BOEING Boeing 757-200
1
B39M BOEING Boeing 737 MAX 9
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 11 operations of UAL3900

11
N68061BOEING Boeing 767-400
→
06/01/2026
4h 57m
No alerts
Replay Analysis
N68061BOEING Boeing 767-400
→
06/01/2026
19m
No alerts
Replay Analysis
N68061BOEING Boeing 767-400
→
06/01/2026
9h 10m
No alerts
Replay Analysis
N17593BOEING Boeing 737 MAX 9
→
05/26/2026
1h 36m
No alerts
Replay Analysis
N20904BOEING Boeing 787-8 BBJ/Dreamliner
→
05/16/2026
1h 6m
No alerts
Replay Analysis
N20904BOEING Boeing 787-8 BBJ/Dreamliner
→
05/15/2026
4h 23m
No alerts
Replay Analysis
N20904BOEING Boeing 787-8 BBJ/Dreamliner
→
05/15/2026
2h 32m
No alerts
Replay Analysis
N20904BOEING Boeing 787-8 BBJ/Dreamliner
→
05/15/2026
10h 42m
No alerts
Replay Analysis
N34137BOEING Boeing 757-200
→
05/03/2026
3h 37m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
04/28/2026
2h 11m
No alerts
Replay Analysis
N62849BOEING Boeing 737-900
→
04/28/2026
20m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window