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 27m. SkyMeter has observed 106 legs of this flight number via ADS-B.

✈
FLIGHTS
106
last 90 days
⏱
AVG DURATION
1h 27m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 8/11/2026
first → last seen
🗺
ROUTES / TYPES
8 / 4
city pairs · airframes
⚠
INCIDENT RATE
0.9%
1 flagged

Routes flown

By count · last 90 days

6
KSFO → KONT
76
avg 1h 22m · San Francisco → Ontario
KMSP → KSFO
7
avg 4h 7m · Minneapolis-St Paul International/Wold-Chamberlain → San Francisco
KHAF → KONT
4
avg 1h 19m · Half Moon Bay → Ontario
KMRY → KLAX
1
avg 1h 37m · Monterey Peninsula → Los Angeles
KOAK → KONT
1
avg 1h 26m · Metropolitan Oakland → Ontario
KRDU → KSFO
1
avg 5h 5m · Raleigh Durham → San Francisco

Aircraft types

Equipment used on this number

4
B39M BOEING Boeing 737 MAX 9
96
A320 AIRBUS Airbus A320
17
B738 BOEING Boeing 737-800
2
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 UAL552

30
N37521BOEING Boeing 737 MAX 9
→
8/11/2026
5h 5m
No alerts
Replay Analysis
N57466BOEING Boeing 737 MAX 9
→
8/11/2026
1h 57m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/10/2026
1h 17m
No alerts
Replay Analysis
N17595BOEING Boeing 737 MAX 9
→
8/9/2026
1h 24m
No alerts
Replay Analysis
N17428BOEING Boeing 737 MAX 9
→
8/8/2026
1h 20m
No alerts
Replay Analysis
N27586BOEING Boeing 737 MAX 9
→
8/7/2026
1h 19m
No alerts
Replay Analysis
N17458BOEING Boeing 737 MAX 9
→
8/6/2026
1h 21m
No alerts
Replay Analysis
N17454BOEING Boeing 737 MAX 9
→
8/5/2026
1h 22m
No alerts
Replay Analysis
N37440BOEING Boeing 737 MAX 9
→
8/4/2026
1h 23m
No alerts
Replay Analysis
N77576BOEING Boeing 737 MAX 9
→
8/3/2026
1h 27m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
8/1/2026
1h 53m
No alerts
Replay Analysis
N17565BOEING Boeing 737 MAX 9
→
7/31/2026
1h 36m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
7/30/2026
1h 22m
No alerts
Replay Analysis
N27526BOEING Boeing 737 MAX 9
→
7/29/2026
1h 32m
No alerts
Replay Analysis
N17438BOEING Boeing 737 MAX 9
→
7/28/2026
1h 43m
No alerts
Replay Analysis
N37504BOEING Boeing 737 MAX 9
→
7/27/2026
17m
No alerts
Replay Analysis
N37504BOEING Boeing 737 MAX 9
→
7/27/2026
1h 21m
No alerts
Replay Analysis
N37502BOEING Boeing 737 MAX 9
→
7/26/2026
1h 15m
No alerts
Replay Analysis
N77584BOEING Boeing 737 MAX 9
→
7/25/2026
1h 21m
No alerts
Replay Analysis
N37516BOEING Boeing 737 MAX 9
→
7/24/2026
1h 3m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
7/23/2026
24m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
7/23/2026
1h 22m
No alerts
Replay Analysis
N17452BOEING Boeing 737 MAX 9
→
7/22/2026
1h 28m
No alerts
Replay Analysis
N77592BOEING Boeing 737 MAX 9
→
7/21/2026
14m
No alerts
Replay Analysis
N77592BOEING Boeing 737 MAX 9
→
7/21/2026
1h 22m
No alerts
Replay Analysis
N17459BOEING Boeing 737 MAX 9
→
7/20/2026
1h 24m
No alerts
Replay Analysis
N47412BOEING Boeing 737 MAX 9
→
7/19/2026
1h 39m
No alerts
Replay Analysis
N37445BOEING Boeing 737 MAX 9
→
7/18/2026
1h 20m
No alerts
Replay Analysis
N47517BOEING Boeing 737 MAX 9
→
7/17/2026
1h 31m
No alerts
Replay Analysis
N17564BOEING Boeing 737 MAX 9
→
7/16/2026
1h 21m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window