UAL520 is operated by UNITED AIRLINES INC between Los Angeles International Airport (KLAX) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 2h 28m. SkyMeter has observed 177 legs of this flight number via ADS-B.

✈
FLIGHTS
177
last 90 days
⏱
AVG DURATION
2h 28m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/5/2026
first → last seen
🗺
ROUTES / TYPES
18 / 7
city pairs · airframes
⚠
INCIDENT RATE
1.1%
2 flagged

Routes flown

By count · last 90 days

10
KLAX → KSFO
36
avg 1h 23m · Los Angeles → San Francisco
KSFO → KMCO
34
avg 5h 19m · San Francisco → Orlando
KSFO → KSLC
20
avg 2h 7m · San Francisco → Salt Lake City
KBUR → KSFO
18
avg 1h 5m · Bob Hope → San Francisco
KSLC → KDEN
14
avg 1h 31m · Salt Lake City → Denver
KSAN → KSFO
10
avg 1h 33m · San Diego → San Francisco
KHAF → KMCO
6
avg 5h 28m · Half Moon Bay → Orlando
KSFO → KISM
3
avg 5h 8m · San Francisco → Kissimmee Gateway
KHAF → KISM
2
avg 5h 5m · Half Moon Bay → Kissimmee Gateway
KEMT → KSFO
1
avg 1h 3m · San Gabriel Valley → San Francisco

Aircraft types

Equipment used on this number

7
B39M BOEING Boeing 737 MAX 9
137
A319 AIRBUS Airbus A319
52
B738 BOEING Boeing 737-800
36
A320 AIRBUS Airbus A320
21
B38M BOEING Boeing 737 MAX 8
19
B739 BOEING Boeing 737-900
14
A21N AIRBUS Airbus A321 Neo
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 UAL520

30
N844UAAIRBUS Airbus A319
→
9/5/2026
1h 41m
No alerts
Replay Analysis
N472UAAIRBUS Airbus A320
→
9/5/2026
1h 2m
No alerts
Replay Analysis
N472UAAIRBUS Airbus A320
→
9/5/2026
17m
No alerts
Replay Analysis
N848UAAIRBUS Airbus A319
→
9/4/2026
1h 49m
No alerts
Replay Analysis
N825UAAIRBUS Airbus A319
→
9/4/2026
57m
No alerts
Replay Analysis
N464UAAIRBUS Airbus A320
→
9/4/2026
1h 31m
No alerts
Replay Analysis
N804UAAIRBUS Airbus A319
→
9/3/2026
1h 53m
No alerts
Replay Analysis
N839UAAIRBUS Airbus A319
→
9/2/2026
2h 9m
No alerts
Replay Analysis
N77530BOEING Boeing 737-800
→
9/2/2026
1h 10m
No alerts
Replay Analysis
N818UAAIRBUS Airbus A319
→
9/1/2026
2h 2m
No alerts
Replay Analysis
N818UAAIRBUS Airbus A319
→
9/1/2026
48m
No alerts
Replay Analysis
N454UAAIRBUS Airbus A320
→
9/1/2026
1h 49m
No alerts
Replay Analysis
N848UAAIRBUS Airbus A319
→
8/31/2026
2h 9m
No alerts
Replay Analysis
N841UAAIRBUS Airbus A319
→
8/31/2026
1h 4m
No alerts
Replay Analysis
N841UAAIRBUS Airbus A319
→
8/31/2026
44m
No alerts
Replay Analysis
N433UAAIRBUS Airbus A320
→
8/31/2026
1h 19m
No alerts
Replay Analysis
N850UAAIRBUS Airbus A319
→
8/30/2026
6m
No alerts
Replay Analysis
N850UAAIRBUS Airbus A319
→
8/30/2026
2h 15m
No alerts
Replay Analysis
N453UAAIRBUS Airbus A320
→
8/30/2026
1h 6m
No alerts
Replay Analysis
N830UAAIRBUS Airbus A319
→
8/29/2026
2h 6m
No alerts
Replay Analysis
N454UAAIRBUS Airbus A320
→
8/29/2026
1h 37m
No alerts
Replay Analysis
N806UAAIRBUS Airbus A319
→
8/28/2026
2h 13m
No alerts
Replay Analysis
N871UAAIRBUS Airbus A319
→
8/28/2026
1h 4m
No alerts
Replay Analysis
N480UAAIRBUS Airbus A320
→
8/28/2026
1h 24m
No alerts
Replay Analysis
N432UAAIRBUS Airbus A320
→
8/27/2026
1h 50m
No alerts
Replay Analysis
N47282BOEING Boeing 737 MAX 8
→
8/27/2026
1h 2m
No alerts
Replay Analysis
N494UAAIRBUS Airbus A320
→
8/27/2026
1h 25m
No alerts
Replay Analysis
N873UAAIRBUS Airbus A319
→
8/26/2026
2h 28m
No alerts
Replay Analysis
N78506BOEING Boeing 737-800
→
8/26/2026
59m
No alerts
Replay Analysis
N840UAAIRBUS Airbus A319
→
8/25/2026
1h 49m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window