UAL552 is operated by UNITED AIRLINES INC between San Francisco International Airport (KSFO) and Ontario International Airport (KONT). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 1h 23m. SkyMeter has observed 98 legs of this flight number via ADS-B.

✈
FLIGHTS
98
last 90 days
⏱
AVG DURATION
1h 23m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 08/22/2026
first → last seen
🗺
ROUTES / TYPES
7 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.0%
1 flagged

Routes flown

By count · last 90 days

4
KSFO → KONT
72
avg 1h 22m · San Francisco → Ontario
KRDU → KSFO
4
avg 5h 5m · Raleigh Durham → San Francisco
KHAF → KONT
4
avg 1h 19m · Half Moon Bay → Ontario
KOAK → KONT
1
avg 1h 26m · Metropolitan Oakland → Ontario

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
91
B38M BOEING Boeing 737 MAX 8
3
A320 AIRBUS Airbus A320
2
B739 BOEING Boeing 737-900
2

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 UAL552

30
N27287BOEING Boeing 737 MAX 8
→
08/22/2026
5h 9m
No alerts
Replay Analysis
N488UAAIRBUS Airbus A320
→
08/22/2026
1h 7m
No alerts
Replay Analysis
N77426BOEING Boeing 737 MAX 9
→
08/18/2026
5h 3m
No alerts
Replay Analysis
N77573BOEING Boeing 737 MAX 9
→
08/18/2026
1h 23m
No alerts
Replay Analysis
N68842BOEING Boeing 737-900
→
08/17/2026
1h 23m
No alerts
Replay Analysis
N37257BOEING Boeing 737 MAX 8
→
08/15/2026
5h 1m
No alerts
Replay Analysis
N431UAAIRBUS Airbus A320
→
08/15/2026
1h 21m
No alerts
Replay Analysis
N66814BOEING Boeing 737-900
→
08/14/2026
1h 33m
No alerts
Replay Analysis
N37521BOEING Boeing 737 MAX 9
→
08/11/2026
5h 5m
No alerts
Replay Analysis
N57466BOEING Boeing 737 MAX 9
→
08/11/2026
1h 57m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
08/10/2026
1h 17m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
08/09/2026
1h 24m
No alerts
Replay Analysis
N17428BOEING Boeing 737 MAX 9
→
08/08/2026
1h 20m
No alerts
Replay Analysis
N27586BOEING Boeing 737 MAX 9
→
08/07/2026
1h 19m
No alerts
Replay Analysis
N17458BOEING Boeing 737 MAX 9
→
08/06/2026
1h 21m
No alerts
Replay Analysis
N17454BOEING Boeing 737 MAX 9
→
08/05/2026
1h 22m
No alerts
Replay Analysis
N37440BOEING Boeing 737 MAX 9
→
08/04/2026
1h 23m
No alerts
Replay Analysis
N77576BOEING Boeing 737 MAX 9
→
08/03/2026
1h 27m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
08/01/2026
1h 53m
No alerts
Replay Analysis
N17565BOEING Boeing 737 MAX 9
→
07/31/2026
1h 36m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
07/30/2026
1h 22m
No alerts
Replay Analysis
N27526BOEING Boeing 737 MAX 9
→
07/29/2026
1h 32m
No alerts
Replay Analysis
N17438BOEING Boeing 737 MAX 9
→
07/28/2026
1h 43m
No alerts
Replay Analysis
N37504BOEING Boeing 737 MAX 9
→
07/27/2026
17m
No alerts
Replay Analysis
N37504BOEING Boeing 737 MAX 9
→
07/27/2026
1h 21m
No alerts
Replay Analysis
N37502BOEING Boeing 737 MAX 9
→
07/26/2026
1h 15m
No alerts
Replay Analysis
N77584BOEING Boeing 737 MAX 9
→
07/25/2026
1h 21m
No alerts
Replay Analysis
N37516BOEING Boeing 737 MAX 9
→
07/24/2026
1h 3m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
07/23/2026
24m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
07/23/2026
1h 22m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window