UAL638 is operated by UNITED AIRLINES INC between San Francisco International Airport (KSFO) and Daniel K Inouye International Airport (PHNL). The flight is most often flown by a BOEING Boeing 757-300. Typical block time is 4h 58m. SkyMeter has observed 87 legs of this flight number via ADS-B.

✈
FLIGHTS
87
last 90 days
⏱
AVG DURATION
4h 58m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/22/2026
first → last seen
🗺
ROUTES / TYPES
7 / 4
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

5
KSFO → PHNL
62
avg 5h 19m · San Francisco → Daniel K Inouye
KHAF → PHNL
9
avg 5h 24m · Half Moon Bay → Daniel K Inouye
KDEN → KTPA
5
avg 3h 32m · Denver → Tampa
KOAK → PHNL
3
avg 5h 19m · Metropolitan Oakland → Daniel K Inouye
US-0188 → PHNL
2
avg 5h 13m · Coast Guard Air Station San Francisco → Daniel K Inouye

Aircraft types

Equipment used on this number

4
B753 BOEING Boeing 757-300
74
B738 BOEING Boeing 737-800
15
B39M BOEING Boeing 737 MAX 9
3
B752 BOEING Boeing 757-200
2

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 UAL638

30
N87507BOEING Boeing 737-800
→
08/22/2026
1h 42m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
08/22/2026
3h 5m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
08/18/2026
1h 18m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
08/18/2026
13m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/18/2026
1h 35m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/17/2026
1h 48m
No alerts
Replay Analysis
N35204BOEING Boeing 737-800
→
08/17/2026
3h 24m
No alerts
Replay Analysis
N73251BOEING Boeing 737-800
→
08/17/2026
2h 4m
No alerts
Replay Analysis
N73251BOEING Boeing 737-800
→
08/16/2026
1h 50m
No alerts
Replay Analysis
N73251BOEING Boeing 737-800
→
08/16/2026
3h 55m
No alerts
Replay Analysis
N79541BOEING Boeing 737-800
→
08/16/2026
3h 28m
No alerts
Replay Analysis
N17229BOEING Boeing 737-800
→
08/14/2026
1h 29m
No alerts
Replay Analysis
N24202BOEING Boeing 737-800
→
08/14/2026
1h 59m
No alerts
Replay Analysis
N24202BOEING Boeing 737-800
→
08/13/2026
1h 51m
No alerts
Replay Analysis
N24202BOEING Boeing 737-800
→
08/13/2026
3h 51m
No alerts
Replay Analysis
N37561BOEING Boeing 737 MAX 9
→
08/12/2026
1h 51m
No alerts
Replay Analysis
N37561BOEING Boeing 737 MAX 9
→
08/11/2026
1h 31m
No alerts
Replay Analysis
N37561BOEING Boeing 737 MAX 9
→
08/11/2026
3h 23m
No alerts
Replay Analysis
N57869BOEING Boeing 757-300
→
08/11/2026
5h 14m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
08/10/2026
5h 7m
No alerts
Replay Analysis
N75858BOEING Boeing 757-300
→
08/09/2026
5h 1m
No alerts
Replay Analysis
N57857BOEING Boeing 757-300
→
08/08/2026
5h 35m
No alerts
Replay Analysis
N77865BOEING Boeing 757-300
→
08/07/2026
5h 39m
No alerts
Replay Analysis
N57862BOEING Boeing 757-300
→
08/06/2026
5h 40m
No alerts
Replay Analysis
N57869BOEING Boeing 757-300
→
08/05/2026
5h 38m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
08/03/2026
5h 8m
No alerts
Replay Analysis
N78866BOEING Boeing 757-300
→
07/31/2026
5h 28m
No alerts
Replay Analysis
N57869BOEING Boeing 757-300
→
07/30/2026
5h 9m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
07/29/2026
5h 25m
No alerts
Replay Analysis
N77867BOEING Boeing 757-300
→
07/28/2026
5h 34m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window