UAL4199 is operated by UNITED AIRLINES INC. between Chicago Rockford International Airport (KRFD) and San Francisco International Airport (KSFO). The flight is most often flown by a BOEING Boeing 787-9 Dreamliner. Typical block time is 1h 36m. SkyMeter has observed 11 legs of this flight number via ADS-B.

✈
FLIGHTS
11
last 90 days
⏱
AVG DURATION
1h 36m
tracked time
📅
SERVICE PERIOD
08/01/2025 → 06/18/2026
first → last seen
🗺
ROUTES / TYPES
5 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

3
KRFD → KORD
1
avg 35m · Chicago Rockford → Chicago O'Hare
KOAK → KSFO
1
avg 51m · Metropolitan Oakland → San Francisco
KLCQ → KIAH
1
avg 2h 5m · Lake City Gateway → George Bush Intercontinental Houston

Aircraft types

Equipment used on this number

5
B789 BOEING Boeing 787-9 Dreamliner
4
B739 BOEING Boeing 737-900
3
B738 BOEING Boeing 737-800
2
A319 AIRBUS Airbus A319
1
B753 BOEING Boeing 757-300
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
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 UAL4199

30
N37255BOEING Boeing 737-800
→
06/18/2026
7m
No alerts
Replay Analysis
N37255BOEING Boeing 737-800
→
06/18/2026
3h 38m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
06/08/2026
1h 28m
No alerts
Replay Analysis
N68805BOEING Boeing 737-900
→
05/23/2026
34m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
05/16/2026
51m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
05/16/2026
1h 29m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
05/15/2026
2h 30m
No alerts
Replay Analysis
N825UAAIRBUS Airbus A319
→
04/20/2026
2h 4m
No alerts
Replay Analysis
N53442BOEING Boeing 737-900
→
04/16/2026
2h 11m
No alerts
Replay Analysis
N61101BOEING Boeing 787-9 Dreamliner
→
04/11/2026
2h 6m
No alerts
Replay Analysis
N69819BOEING Boeing 737-900
→
04/08/2026
45m
No alerts
Replay Analysis
N27213BOEING Boeing 737-800
→
03/29/2026
1h 28m
No alerts
Replay Analysis
N871UAAIRBUS Airbus A319
→
03/25/2026
57m
No alerts
Replay Analysis
N24542AIRBUS Airbus A321 Neo
→
03/17/2026
2h 34m
No alerts
Replay Analysis
N33294BOEING Boeing 737-800
→
03/12/2026
21m
No alerts
Replay Analysis
N29124BOEING Boeing 757-200
→
03/03/2026
1h 40m
No alerts
Replay Analysis
N448UAAIRBUS Airbus A320
→
02/19/2026
1h 12m
No alerts
Replay Analysis
N54241BOEING Boeing 737-800
→
02/04/2026
53m
No alerts
Replay Analysis
N33286BOEING Boeing 737-800
→
01/29/2026
2h 33m
No alerts
Replay Analysis
N28912BOEING Boeing 787-8 BBJ/Dreamliner
→
01/22/2026
1h 1m
No alerts
Replay Analysis
N58101BOEING Boeing 757-200
→
01/16/2026
1h 45m
No alerts
Replay Analysis
N76288BOEING Boeing 737-800
→
12/22/2025
1h 54m
No alerts
Replay Analysis
N653UABOEING Boeing 767-300
→
12/20/2025
2h 7m
No alerts
Replay Analysis
N447UAAIRBUS Airbus A320
→
11/16/2025
1h 1m
No alerts
Replay Analysis
N26226BOEING Boeing 737-800
→
11/09/2025
38m
No alerts
Replay Analysis
N492UAAIRBUS Airbus A320
→
10/28/2025
2h 35m
No alerts
Replay Analysis
N37351BOEING Boeing 737 MAX 8
→
10/20/2025
1h 59m
No alerts
Replay Analysis
N77258BOEING Boeing 737-800
→
10/15/2025
2h 5m
No alerts
Replay Analysis
N77525BOEING Boeing 737-800
→
10/06/2025
2h 14m
No alerts
Replay Analysis
N804UAAIRBUS Airbus A319
→
09/17/2025
1h 12m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window