UAL3921

UNITED AIRLINES INC · EWR → IAH

UAL3921 is operated by UNITED AIRLINES INC between Newark Liberty International Airport (KEWR) and George Bush Intercontinental Houston Airport (KIAH). The flight is most often flown by a BOEING Boeing 767-300. Typical block time is 3h 43m. SkyMeter has observed 22 legs of this flight number via ADS-B.

✈
FLIGHTS
22
last 90 days
⏱
AVG DURATION
3h 43m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 07/17/2026
first → last seen
🗺
ROUTES / TYPES
21 / 10
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

10
KEWR → KIAH
2
avg 3h 25m · Newark Liberty → George Bush Intercontinental Houston
KIAH → KSFO
1
avg 3h 27m · George Bush Intercontinental Houston → San Francisco
EGPH → KIAD
1
avg 7h 42m · Edinburgh → Washington Dulles
KSFO → KORD
1
avg 4h 9m · San Francisco → Chicago O'Hare
KEWR → KCLT
1
avg 1h 33m · Newark Liberty → Charlotte Douglas
KLAX → KDEN
1
avg 2h 3m · Los Angeles → Denver
KORD → KLGA
1
avg 1h 38m · Chicago O'Hare → La Guardia
KIAD → KSFO
1
avg 5h 41m · Washington Dulles → San Francisco
CYYZ → KORD
1
avg 2h 21m · Lester B. Pearson → Chicago O'Hare
KORD → KDEN
1
avg 2h 37m · Chicago O'Hare → Denver

Aircraft types

Equipment used on this number

10
B763 BOEING Boeing 767-300
9
B764 BOEING Boeing 767-400
3
B772 BOEING Boeing 777-200
3
A21N AIRBUS Airbus A321 Neo
3
A320 AIRBUS Airbus A320
2
B752 BOEING Boeing 757-200
2
B38M BOEING Boeing 737 MAX 8
2
B789 BOEING Boeing 787-9 Dreamliner
2
B39M BOEING Boeing 737 MAX 9
1
B77W BOEING Boeing 777-300ER
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 UAL3921

30
N431UAAIRBUS Airbus A320
→
07/17/2026
1h 54m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
07/16/2026
31m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
07/15/2026
4h 9m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
07/15/2026
3h 37m
No alerts
Replay Analysis
N66051BOEING Boeing 767-400
→
07/08/2026
1h 30m
No alerts
Replay Analysis
N66051BOEING Boeing 767-400
→
07/08/2026
7h 37m
No alerts
Replay Analysis
N66051BOEING Boeing 767-400
→
07/08/2026
9h 9m
No alerts
Replay Analysis
N12238BOEING Boeing 737-800
→
07/04/2026
1h 14m
No alerts
Replay Analysis
N17311BOEING Boeing 737 MAX 8
→
07/01/2026
2h 7m
No alerts
Replay Analysis
N796UABOEING Boeing 777-200
→
06/28/2026
3h 32m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
06/26/2026
1h 17m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
06/25/2026
5h 29m
No alerts
Replay Analysis
N684UABOEING Boeing 767-300
→
06/25/2026
6h 47m
No alerts
Replay Analysis
N217UABOEING Boeing 777-200
→
06/20/2026
3h 38m
No alerts
Replay Analysis
N2333UBOEING Boeing 777-300ER
→
06/18/2026
1h 19m
No alerts
Replay Analysis
N14503AIRBUS Airbus A321 Neo
→
06/15/2026
1h 37m
No alerts
Replay Analysis
N77580BOEING Boeing 737 MAX 9
→
06/13/2026
1h 33m
No alerts
Replay Analysis
N29971BOEING Boeing 787-9 Dreamliner
→
06/12/2026
3h 27m
No alerts
Replay Analysis
N38479BOEING Boeing 737-900
→
06/05/2026
44m
No alerts
Replay Analysis
N14509AIRBUS Airbus A321 Neo
→
05/29/2026
2h 2m
No alerts
Replay Analysis
N19136BOEING Boeing 757-200
→
05/26/2026
7h 41m
No alerts
Replay Analysis
N81105BOEING Boeing 787-9 Dreamliner
→
05/22/2026
5h 40m
No alerts
Replay Analysis
N445UAAIRBUS Airbus A320
→
05/18/2026
2h 20m
No alerts
Replay Analysis
N788UABOEING Boeing 777-200
→
05/16/2026
3h 13m
No alerts
Replay Analysis
N47288BOEING Boeing 737 MAX 8
→
05/13/2026
3h 1m
No alerts
Replay Analysis
N18119BOEING Boeing 757-200
→
05/09/2026
4h 57m
No alerts
Replay Analysis
N648UABOEING Boeing 767-300
→
05/03/2026
1h 22m
No alerts
Replay Analysis
N648UABOEING Boeing 767-300
→
05/02/2026
7h 41m
No alerts
Replay Analysis
N648UABOEING Boeing 767-300
→
05/02/2026
9h 4m
No alerts
Replay Analysis
N14563AIRBUS Airbus A321 Neo
→
04/27/2026
2h 37m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window