UAL3931

UNITED AIRLINES INC · HND → SFO

UAL3931 is operated by UNITED AIRLINES INC between Tokyo Haneda International Airport (RJTT) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 2h 37m. SkyMeter has observed 11 legs of this flight number via ADS-B.

✈
FLIGHTS
11
last 90 days
⏱
AVG DURATION
2h 37m
tracked time
📅
SERVICE PERIOD
04/10/2026 → 05/25/2026
first → last seen
🗺
ROUTES / TYPES
11 / 9
city pairs · airframes
⚠
INCIDENT RATE
9.1%
1 flagged

Routes flown

By count · last 90 days

9
RJTT → KSFO
1
avg 9h 16m · Tokyo Haneda → San Francisco
KEWR → KIAD
1
avg 1h 20m · Newark Liberty → Washington Dulles
KSFO → KLAX
1
avg 1h 22m · San Francisco → Los Angeles
KIAD → KBOS
1
avg 1h 28m · Washington Dulles → General Edward Lawrence Logan
KDEN → KGJT
1
avg 50m · Denver → Grand Junction
KORD → KSYR
1
avg 1h 23m · Chicago O'Hare → Syracuse Hancock
KBZN → KIAH
1
avg 3h 4m · Gallatin Field → George Bush Intercontinental Houston
KORD → KLGA
1
avg 1h 44m · Chicago O'Hare → La Guardia
KSRQ → KORD
1
avg 2h 50m · Sarasota Bradenton → Chicago O'Hare

Aircraft types

Equipment used on this number

9
B738 BOEING Boeing 737-800
2
B772 BOEING Boeing 777-200
2
A21N AIRBUS Airbus A321 Neo
1
B763 BOEING Boeing 767-300
1
B38M BOEING Boeing 737 MAX 8
1
A319 AIRBUS Airbus A319
1
B753 BOEING Boeing 757-300
1
B739 BOEING Boeing 737-900
1
B789 BOEING Boeing 787-9 Dreamliner
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
1
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 UAL3931

11
N27268BOEING Boeing 737 MAX 8
→
05/25/2026
3h 4m
No alerts
Replay Analysis
N78001BOEING Boeing 777-200
→
05/24/2026
9h 15m
No alerts
Replay Analysis
N78001BOEING Boeing 777-200
→
05/24/2026
4h 27m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
05/11/2026
1h 4m
No alerts
Replay Analysis
N24972BOEING Boeing 787-9 Dreamliner
→
05/04/2026
1h 22m
No alerts
Replay Analysis
N54538AIRBUS Airbus A321 Neo
→
05/02/2026
1h 28m
No alerts
Replay Analysis
N37437BOEING Boeing 737-900
→
04/30/2026
50m
△ Unstable
Replay Analysis
N27239BOEING Boeing 737-800
→
04/20/2026
1h 43m
No alerts
Replay Analysis
N642UABOEING Boeing 767-300
→
04/17/2026
1h 20m
No alerts
Replay Analysis
N824UAAIRBUS Airbus A319
→
04/12/2026
1h 22m
No alerts
Replay Analysis
N73276BOEING Boeing 737-800
→
04/10/2026
2h 49m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window