UAL2251

UNITED AIRLINES INC · ORD → SFO

UAL2251 is operated by UNITED AIRLINES INC between Chicago O'Hare International Airport (KORD) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 3h 40m. SkyMeter has observed 95 legs of this flight number via ADS-B.

✈
FLIGHTS
95
last 90 days
⏱
AVG DURATION
3h 40m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 07/19/2026
first → last seen
🗺
ROUTES / TYPES
5 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.1%
1 flagged

Routes flown

By count · last 90 days

2
KORD → KSFO
64
avg 4h 26m · Chicago O'Hare → San Francisco
KMCO → KEWR
15
avg 2h 15m · Orlando → Newark Liberty

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
110
B739 BOEING Boeing 737-900
84
A21N AIRBUS Airbus A321 Neo
26
B38M BOEING Boeing 737 MAX 8
1

Safety profile

Flagged flights · last 90 days

Go-arounds
1
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 UAL2251

30
N66837BOEING Boeing 737-900
→
07/19/2026
2h 32m
No alerts
Replay Analysis
N66837BOEING Boeing 737-900
→
07/19/2026
8m
No alerts
Replay Analysis
N36476BOEING Boeing 737-900
→
07/19/2026
1h 19m
No alerts
Replay Analysis
N36476BOEING Boeing 737-900
→
07/18/2026
2h 45m
No alerts
Replay Analysis
N36476BOEING Boeing 737-900
→
07/18/2026
6m
No alerts
Replay Analysis
N36476BOEING Boeing 737-900
→
07/18/2026
4h 12m
No alerts
Replay Analysis
N77543BOEING Boeing 737 MAX 9
→
07/18/2026
1h 42m
No alerts
Replay Analysis
N77543BOEING Boeing 737 MAX 9
→
07/17/2026
4h 19m
No alerts
Replay Analysis
N77543BOEING Boeing 737 MAX 9
→
07/17/2026
2h 36m
No alerts
Replay Analysis
N77585BOEING Boeing 737 MAX 9
→
07/17/2026
2h 11m
No alerts
Replay Analysis
N77585BOEING Boeing 737 MAX 9
→
07/16/2026
2h 26m
No alerts
Replay Analysis
N77585BOEING Boeing 737 MAX 9
→
07/16/2026
6m
No alerts
Replay Analysis
N77585BOEING Boeing 737 MAX 9
→
07/16/2026
5h 8m
No alerts
Replay Analysis
N37422BOEING Boeing 737-900
→
07/16/2026
1h 31m
No alerts
Replay Analysis
N37422BOEING Boeing 737-900
→
07/15/2026
3h 51m
No alerts
Replay Analysis
N37422BOEING Boeing 737-900
→
07/15/2026
2h 19m
No alerts
Replay Analysis
N37518BOEING Boeing 737 MAX 9
→
07/15/2026
1h 20m
No alerts
Replay Analysis
N37518BOEING Boeing 737 MAX 9
→
07/14/2026
4h 5m
No alerts
Replay Analysis
N37518BOEING Boeing 737 MAX 9
→
07/14/2026
2h 44m
No alerts
Replay Analysis
N66808BOEING Boeing 737-900
→
07/14/2026
1h 28m
No alerts
Replay Analysis
N66808BOEING Boeing 737-900
→
07/13/2026
3h 59m
No alerts
Replay Analysis
N66808BOEING Boeing 737-900
→
07/13/2026
2h 31m
No alerts
Replay Analysis
N38443BOEING Boeing 737-900
→
07/13/2026
1h 20m
No alerts
Replay Analysis
N38443BOEING Boeing 737-900
→
07/12/2026
3h 47m
No alerts
Replay Analysis
N38443BOEING Boeing 737-900
→
07/12/2026
2h 27m
No alerts
Replay Analysis
N69839BOEING Boeing 737-900
→
07/12/2026
1h 7m
No alerts
Replay Analysis
N69839BOEING Boeing 737-900
→
07/11/2026
4h 9m
No alerts
Replay Analysis
N69839BOEING Boeing 737-900
→
07/11/2026
3h 1m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
07/11/2026
1h 50m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
07/10/2026
2h 50m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window