UAL591 is operated by UNITED AIRLINES INC between Newark Liberty International Airport (KEWR) and San Antonio International Airport (KSAT). The flight is most often flown by a BOEING Boeing 737 MAX 8. Typical block time is 3h 33m. SkyMeter has observed 38 legs of this flight number via ADS-B.

✈
FLIGHTS
38
last 90 days
⏱
AVG DURATION
3h 33m
tracked time
📅
SERVICE PERIOD
04/06/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
4 / 5
city pairs · airframes
⚠
INCIDENT RATE
5.3%
2 flagged

Routes flown

By count · last 90 days

2
KEWR → KSAT
31
avg 3h 55m · Newark Liberty → San Antonio
KRNO → KSFO
1
avg 1h 6m · Reno Tahoe → San Francisco

Aircraft types

Equipment used on this number

5
B38M BOEING Boeing 737 MAX 8
19
A319 AIRBUS Airbus A319
8
B39M BOEING Boeing 737 MAX 9
6
B739 BOEING Boeing 737-900
4
B738 BOEING Boeing 737-800
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
2
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 UAL591

30
N807UAAIRBUS Airbus A319
→
06/03/2026
3h 36m
No alerts
Replay Analysis
N840UAAIRBUS Airbus A319
→
06/02/2026
3h 36m
No alerts
Replay Analysis
N890UAAIRBUS Airbus A319
→
06/01/2026
3h 42m
No alerts
Replay Analysis
N78509BOEING Boeing 737-800
→
05/31/2026
1h 5m
No alerts
Replay Analysis
N879UAAIRBUS Airbus A319
→
05/29/2026
2h 3m
No alerts
Replay Analysis
N851UAAIRBUS Airbus A319
→
05/28/2026
3h 46m
No alerts
Replay Analysis
N828UAAIRBUS Airbus A319
→
05/26/2026
3h 43m
No alerts
Replay Analysis
N851UAAIRBUS Airbus A319
→
05/25/2026
3h 58m
No alerts
Replay Analysis
N848UAAIRBUS Airbus A319
→
05/21/2026
3h 38m
No alerts
Replay Analysis
N37257BOEING Boeing 737 MAX 8
→
05/20/2026
3h 42m
No alerts
Replay Analysis
N69888BOEING Boeing 737-900
→
05/18/2026
3h 41m
No alerts
Replay Analysis
N37514BOEING Boeing 737 MAX 9
→
05/15/2026
3h 40m
No alerts
Replay Analysis
N37471BOEING Boeing 737-900
→
05/14/2026
3h 43m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
05/13/2026
3h 44m
No alerts
Replay Analysis
N17289BOEING Boeing 737 MAX 8
→
05/11/2026
4h 6m
No alerts
Replay Analysis
N47275BOEING Boeing 737 MAX 8
→
05/10/2026
4h 5m
No alerts
Replay Analysis
N47343BOEING Boeing 737 MAX 8
→
05/03/2026
7m
No alerts
Replay Analysis
N47343BOEING Boeing 737 MAX 8
→
05/03/2026
3h 56m
No alerts
Replay Analysis
N17333BOEING Boeing 737 MAX 8
→
05/01/2026
4h 26m
△ Unstable
Replay Analysis
N68823BOEING Boeing 737-900
→
04/30/2026
4h 5m
No alerts
Replay Analysis
N17333BOEING Boeing 737 MAX 8
→
04/28/2026
4h 1m
No alerts
Replay Analysis
N77572BOEING Boeing 737 MAX 9
→
04/27/2026
3h 53m
No alerts
Replay Analysis
N27255BOEING Boeing 737 MAX 8
→
04/26/2026
3h 51m
No alerts
Replay Analysis
N37521BOEING Boeing 737 MAX 9
→
04/24/2026
3h 55m
No alerts
Replay Analysis
N75428BOEING Boeing 737-900
→
04/23/2026
3h 39m
No alerts
Replay Analysis
N37547BOEING Boeing 737 MAX 9
→
04/21/2026
4h 5m
No alerts
Replay Analysis
N17359BOEING Boeing 737 MAX 8
→
04/20/2026
4h 10m
△ Unstable
Replay Analysis
N17349BOEING Boeing 737 MAX 8
→
04/19/2026
44m
No alerts
Replay Analysis
N17349BOEING Boeing 737 MAX 8
→
04/19/2026
4h 21m
No alerts
Replay Analysis
N37528BOEING Boeing 737 MAX 9
→
04/17/2026
4h 2m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window