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 59m. SkyMeter has observed 112 legs of this flight number via ADS-B.

✈
FLIGHTS
112
last 90 days
⏱
AVG DURATION
3h 59m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/5/2026
first → last seen
🗺
ROUTES / TYPES
8 / 4
city pairs · airframes
⚠
INCIDENT RATE
0.9%
1 flagged

Routes flown

By count · last 90 days

6
KIAD → KDEN
75
avg 3h 54m · Washington Dulles → Denver
KSFO → KIAD
24
avg 5h 10m · San Francisco → Washington Dulles
KIAD → KCOS
1
avg 4h 0m · Washington Dulles → City of Colorado Springs
KHAF → KIAD
1
avg 4h 53m · Half Moon Bay → Washington Dulles
KCOS → KDEN
1
avg 53m · City of Colorado Springs → Denver
KIAD → KFTG
1
avg 4h 9m · Washington Dulles → Colorado Air and Space Port

Aircraft types

Equipment used on this number

4
B753 BOEING Boeing 757-300
206
B789 BOEING Boeing 787-9 Dreamliner
23
A21N AIRBUS Airbus A321 Neo
17
B752 BOEING Boeing 757-200
2

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
1
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
N14576
→
9/5/2026
2h 32m
No alerts
Replay Analysis
N25982BOEING Boeing 787-9 Dreamliner
→
9/5/2026
5h 14m
No alerts
Replay Analysis
N29978BOEING Boeing 787-9 Dreamliner
→
9/4/2026
6h 31m
No alerts
Replay Analysis
N34551AIRBUS Airbus A321 Neo
→
9/4/2026
56m
No alerts
Replay Analysis
N14530AIRBUS Airbus A321 Neo
→
9/2/2026
1h 36m
No alerts
Replay Analysis
N22995BOEING Boeing 787-9 Dreamliner
→
9/2/2026
5h 25m
No alerts
Replay Analysis
N14549AIRBUS Airbus A321 Neo
→
9/2/2026
1h 20m
No alerts
Replay Analysis
N14549AIRBUS Airbus A321 Neo
→
9/1/2026
2h 35m
No alerts
Replay Analysis
N14549AIRBUS Airbus A321 Neo
→
9/1/2026
3h 55m
No alerts
Replay Analysis
N22995BOEING Boeing 787-9 Dreamliner
→
9/1/2026
4h 53m
No alerts
Replay Analysis
N48127BOEING Boeing 757-200
→
9/1/2026
1h 44m
No alerts
Replay Analysis
N48127BOEING Boeing 757-200
→
8/31/2026
2h 25m
No alerts
Replay Analysis
N23994BOEING Boeing 787-9 Dreamliner
→
8/31/2026
5h 3m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
8/31/2026
1h 53m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
8/30/2026
4h 14m
No alerts
Replay Analysis
N77871BOEING Boeing 757-300
→
8/30/2026
2h 20m
No alerts
Replay Analysis
N61109
→
8/30/2026
5h 19m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/30/2026
1h 14m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/29/2026
3h 52m
No alerts
Replay Analysis
N57864BOEING Boeing 757-300
→
8/29/2026
2h 37m
No alerts
Replay Analysis
N26960BOEING Boeing 787-9 Dreamliner
→
8/29/2026
4h 54m
No alerts
Replay Analysis
N73860BOEING Boeing 757-300
→
8/29/2026
1h 51m
No alerts
Replay Analysis
N73860BOEING Boeing 757-300
→
8/28/2026
4h 25m
No alerts
Replay Analysis
N73860BOEING Boeing 757-300
→
8/28/2026
2h 33m
No alerts
Replay Analysis
N29977BOEING Boeing 787-9 Dreamliner
→
8/28/2026
4h 59m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/28/2026
2h 3m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/27/2026
4h 37m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/27/2026
2h 33m
No alerts
Replay Analysis
N36962BOEING Boeing 787-9 Dreamliner
→
8/27/2026
4h 41m
No alerts
Replay Analysis
N74856BOEING Boeing 757-300
→
8/27/2026
2h 21m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window