UAL540 is operated by UNITED AIRLINES INC between Denver International Airport (KDEN) and San Diego International Airport (KSAN). The flight is most often flown by a AIRBUS Airbus A321 Neo. Typical block time is 2h 57m. SkyMeter has observed 193 legs of this flight number via ADS-B.

✈
FLIGHTS
193
last 90 days
⏱
AVG DURATION
2h 57m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 07/19/2026
first → last seen
🗺
ROUTES / TYPES
14 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.5%
1 flagged

Routes flown

By count · last 90 days

10
KDEN → KSAN
75
avg 2h 24m · Denver → San Diego
KSFO → KDEN
45
avg 2h 39m · San Francisco → Denver
KRDU → KSFO
29
avg 5h 19m · Raleigh Durham → San Francisco
KPNS → KDEN
16
avg 3h 4m · Pensacola → Denver
KHAF → KDEN
10
avg 2h 36m · Half Moon Bay → Denver
KOAK → KDEN
2
avg 2h 36m · Metropolitan Oakland → Denver
FD47 → KDEN
1
avg 3h 46m · Gulf Breeze Hospital Heliport → Denver
2CO9 → KGJT
1
avg 14m · Lands End Heliport → Grand Junction
KLAS → KSFO
1
avg 1h 45m · McCarran → San Francisco
KRDU → KLAS
1
avg 4h 43m · Raleigh Durham → McCarran

Aircraft types

Equipment used on this number

5
A21N AIRBUS Airbus A321 Neo
139
B38M BOEING Boeing 737 MAX 8
50
B738 BOEING Boeing 737-800
17
B739 BOEING Boeing 737-900
3
B39M BOEING Boeing 737 MAX 9
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 UAL540

30
N24510AIRBUS Airbus A321 Neo
→
07/19/2026
3h 0m
No alerts
Replay Analysis
N14517AIRBUS Airbus A321 Neo
→
07/19/2026
2h 1m
No alerts
Replay Analysis
N14504AIRBUS Airbus A321 Neo
→
07/18/2026
2h 31m
No alerts
Replay Analysis
N14502AIRBUS Airbus A321 Neo
→
07/18/2026
2h 46m
No alerts
Replay Analysis
N24573
→
07/17/2026
2h 38m
No alerts
Replay Analysis
N14560AIRBUS Airbus A321 Neo
→
07/17/2026
2h 15m
No alerts
Replay Analysis
N14553AIRBUS Airbus A321 Neo
→
07/16/2026
2h 46m
No alerts
Replay Analysis
N14520AIRBUS Airbus A321 Neo
→
07/16/2026
2h 25m
No alerts
Replay Analysis
N14507AIRBUS Airbus A321 Neo
→
07/15/2026
2h 25m
No alerts
Replay Analysis
N14563AIRBUS Airbus A321 Neo
→
07/15/2026
2h 39m
No alerts
Replay Analysis
N44550AIRBUS Airbus A321 Neo
→
07/14/2026
3h 12m
No alerts
Replay Analysis
N24505AIRBUS Airbus A321 Neo
→
07/14/2026
2h 13m
No alerts
Replay Analysis
N14545AIRBUS Airbus A321 Neo
→
07/13/2026
2h 24m
No alerts
Replay Analysis
N24516AIRBUS Airbus A321 Neo
→
07/13/2026
2h 12m
No alerts
Replay Analysis
N14545AIRBUS Airbus A321 Neo
→
07/12/2026
2h 41m
No alerts
Replay Analysis
N14504AIRBUS Airbus A321 Neo
→
07/12/2026
2h 22m
No alerts
Replay Analysis
N14548AIRBUS Airbus A321 Neo
→
07/11/2026
2h 45m
No alerts
Replay Analysis
N14560AIRBUS Airbus A321 Neo
→
07/11/2026
2h 26m
No alerts
Replay Analysis
N14544AIRBUS Airbus A321 Neo
→
07/10/2026
2h 23m
No alerts
Replay Analysis
N24505AIRBUS Airbus A321 Neo
→
07/10/2026
2h 15m
No alerts
Replay Analysis
N14531AIRBUS Airbus A321 Neo
→
07/09/2026
3h 0m
No alerts
Replay Analysis
N14511AIRBUS Airbus A321 Neo
→
07/09/2026
2h 17m
No alerts
Replay Analysis
N14520AIRBUS Airbus A321 Neo
→
07/08/2026
2h 38m
No alerts
Replay Analysis
N44501AIRBUS Airbus A321 Neo
→
07/08/2026
2h 16m
No alerts
Replay Analysis
N14507AIRBUS Airbus A321 Neo
→
07/07/2026
2h 54m
No alerts
Replay Analysis
N14544AIRBUS Airbus A321 Neo
→
07/07/2026
2h 17m
No alerts
Replay Analysis
N14512AIRBUS Airbus A321 Neo
→
07/06/2026
2h 39m
No alerts
Replay Analysis
N14564AIRBUS Airbus A321 Neo
→
07/06/2026
2h 28m
No alerts
Replay Analysis
N14518AIRBUS Airbus A321 Neo
→
07/05/2026
11m
No alerts
Replay Analysis
N14518AIRBUS Airbus A321 Neo
→
07/05/2026
2h 25m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window