UAL599 is operated by UNITED AIRLINES INC between Washington Dulles International Airport (KIAD) and Denver International Airport (KDEN). The flight is most often flown by a BOEING Boeing 757-300. Typical block time is 3h 4m. SkyMeter has observed 57 legs of this flight number via ADS-B.

✈
FLIGHTS
57
last 90 days
⏱
AVG DURATION
3h 4m
tracked time
📅
SERVICE PERIOD
04/06/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
3 / 2
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

1
KIAD → KDEN
33
avg 3h 57m · Washington Dulles → Denver

Aircraft types

Equipment used on this number

2
B753 BOEING Boeing 757-300
108
A21N AIRBUS Airbus A321 Neo
11

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 UAL599

30
N57857BOEING Boeing 757-300
→
06/03/2026
2h 12m
No alerts
Replay Analysis
N75851BOEING Boeing 757-300
→
06/03/2026
1h 25m
No alerts
Replay Analysis
N75851BOEING Boeing 757-300
→
06/02/2026
3h 37m
No alerts
Replay Analysis
N75851BOEING Boeing 757-300
→
06/02/2026
2h 12m
No alerts
Replay Analysis
N57868BOEING Boeing 757-300
→
06/02/2026
2h 49m
No alerts
Replay Analysis
N57868BOEING Boeing 757-300
→
06/01/2026
4h 15m
No alerts
Replay Analysis
N57868BOEING Boeing 757-300
→
06/01/2026
1h 26m
No alerts
Replay Analysis
N77865BOEING Boeing 757-300
→
06/01/2026
1h 46m
No alerts
Replay Analysis
N77865BOEING Boeing 757-300
→
05/31/2026
2h 0m
No alerts
Replay Analysis
N77865BOEING Boeing 757-300
→
05/31/2026
3h 47m
No alerts
Replay Analysis
N75851BOEING Boeing 757-300
→
05/31/2026
1h 52m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
05/29/2026
2h 22m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/29/2026
1h 49m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/28/2026
2h 14m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/28/2026
4h 4m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
05/28/2026
2h 6m
No alerts
Replay Analysis
N77867BOEING Boeing 757-300
→
05/26/2026
2h 20m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/26/2026
1h 16m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/25/2026
2h 13m
No alerts
Replay Analysis
N57855BOEING Boeing 757-300
→
05/25/2026
3h 31m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
05/25/2026
1h 22m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
05/24/2026
3h 39m
No alerts
Replay Analysis
N56859BOEING Boeing 757-300
→
05/24/2026
2h 16m
No alerts
Replay Analysis
N75854BOEING Boeing 757-300
→
05/24/2026
1h 51m
No alerts
Replay Analysis
N75854BOEING Boeing 757-300
→
05/23/2026
1h 55m
No alerts
Replay Analysis
N75854BOEING Boeing 757-300
→
05/23/2026
3h 47m
No alerts
Replay Analysis
N75861BOEING Boeing 757-300
→
05/23/2026
1h 55m
No alerts
Replay Analysis
N75861BOEING Boeing 757-300
→
05/22/2026
46m
No alerts
Replay Analysis
N75853BOEING Boeing 757-300
→
05/22/2026
1h 41m
No alerts
Replay Analysis
N75853BOEING Boeing 757-300
→
05/21/2026
2h 14m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window