UAL604 is operated by UNITED AIRLINES INC between San Francisco International Airport (KSFO) and George Bush Intercontinental Houston Airport (KIAH). The flight is most often flown by a BOEING Boeing 777-200. Typical block time is 3h 15m. SkyMeter has observed 144 legs of this flight number via ADS-B.

✈
FLIGHTS
144
last 90 days
⏱
AVG DURATION
3h 15m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/22/2026
first → last seen
🗺
ROUTES / TYPES
8 / 8
city pairs · airframes
⚠
INCIDENT RATE
2.8%
4 flagged

Routes flown

By count · last 90 days

6
KSFO → KIAH
55
avg 3h 35m · San Francisco → George Bush Intercontinental Houston
KIAH → KBWI
52
avg 2h 39m · George Bush Intercontinental Houston → Baltimore/Washington International Thurgood Marshall
KHAF → KIAH
26
avg 3h 33m · Half Moon Bay → George Bush Intercontinental Houston
US-0188 → KIAH
4
avg 3h 31m · Coast Guard Air Station San Francisco → George Bush Intercontinental Houston
KOAK → KIAH
3
avg 3h 38m · Metropolitan Oakland → George Bush Intercontinental Houston
KIAH → KMTN
1
avg 2h 37m · George Bush Intercontinental Houston → Martin State

Aircraft types

Equipment used on this number

8
B772 BOEING Boeing 777-200
88
B39M BOEING Boeing 737 MAX 9
33
B739 BOEING Boeing 737-900
10
B738 BOEING Boeing 737-800
6
B737 BOEING Boeing 737-700
4
A320 AIRBUS Airbus A320
1
B77W BOEING Boeing 777-300ER
1
A319 AIRBUS Airbus A319
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
4
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 UAL604

30
N4888UAIRBUS Airbus A319
→
08/22/2026
2h 46m
No alerts
Replay Analysis
N215UABOEING Boeing 777-200
→
08/22/2026
3h 38m
No alerts
Replay Analysis
N210UABOEING Boeing 777-200
→
08/21/2026
4h 1m
No alerts
Replay Analysis
N38403BOEING Boeing 737-900
→
08/20/2026
2h 44m
No alerts
Replay Analysis
N213UABOEING Boeing 777-200
→
08/19/2026
3h 30m
No alerts
Replay Analysis
N78438BOEING Boeing 737-900
→
08/18/2026
2h 33m
No alerts
Replay Analysis
N774UABOEING Boeing 777-200
→
08/18/2026
3h 24m
No alerts
Replay Analysis
N35407BOEING Boeing 737-900
→
08/17/2026
2h 44m
No alerts
Replay Analysis
N222UABOEING Boeing 777-200
→
08/17/2026
3h 46m
No alerts
Replay Analysis
N79402BOEING Boeing 737-900
→
08/16/2026
2h 31m
No alerts
Replay Analysis
N774UABOEING Boeing 777-200
→
08/16/2026
3h 31m
No alerts
Replay Analysis
N459UAAIRBUS Airbus A320
→
08/15/2026
2h 42m
No alerts
Replay Analysis
N781UABOEING Boeing 777-200
→
08/15/2026
4h 0m
No alerts
Replay Analysis
N32404BOEING Boeing 737-900
→
08/14/2026
2h 42m
No alerts
Replay Analysis
N779UABOEING Boeing 777-200
→
08/14/2026
3h 35m
No alerts
Replay Analysis
N72405BOEING Boeing 737-900
→
08/13/2026
2h 41m
No alerts
Replay Analysis
N776UABOEING Boeing 777-200
→
08/13/2026
3h 36m
No alerts
Replay Analysis
N210UABOEING Boeing 777-200
→
08/12/2026
3h 36m
No alerts
Replay Analysis
N38459BOEING Boeing 737-900
→
08/11/2026
2h 43m
No alerts
Replay Analysis
N779UABOEING Boeing 777-200
→
08/11/2026
3h 40m
No alerts
Replay Analysis
N17452BOEING Boeing 737 MAX 9
→
08/10/2026
2h 32m
No alerts
Replay Analysis
N213UABOEING Boeing 777-200
→
08/10/2026
3h 30m
No alerts
Replay Analysis
N210UABOEING Boeing 777-200
→
08/09/2026
3h 29m
No alerts
Replay Analysis
N771UABOEING Boeing 777-200
→
08/08/2026
4h 7m
No alerts
Replay Analysis
N17411BOEING Boeing 737 MAX 9
→
08/07/2026
2h 44m
No alerts
Replay Analysis
N773UABOEING Boeing 777-200
→
08/07/2026
3h 33m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
08/06/2026
2h 48m
No alerts
Replay Analysis
N774UABOEING Boeing 777-200
→
08/06/2026
3h 18m
No alerts
Replay Analysis
N17402BOEING Boeing 737 MAX 9
→
08/05/2026
2h 45m
No alerts
Replay Analysis
N779UABOEING Boeing 777-200
→
08/05/2026
3h 24m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window