UAL399 is operated by UMB BANK NA TRUSTEE between Newark Liberty International Airport (KEWR) and Louis Armstrong New Orleans International Airport (KMSY). The flight is most often flown by a BOEING Boeing 757-200. Typical block time is 2h 24m. SkyMeter has observed 38 legs of this flight number via ADS-B.

✈
FLIGHTS
38
last 90 days
⏱
AVG DURATION
2h 24m
tracked time
📅
SERVICE PERIOD
04/17/2026 → 06/03/2026
first → last seen
🗺
ROUTES / TYPES
7 / 6
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

5
KIAH → KSFO
7
avg 3h 51m · George Bush Intercontinental Houston → San Francisco
KEWR → KMSY
7
avg 2h 53m · Newark Liberty → Louis Armstrong New Orleans
KDFW → KIAH
6
avg 41m · Dallas Fort Worth → George Bush Intercontinental Houston
KORD → KDFW
5
avg 2h 7m · Chicago O'Hare → Dallas Fort Worth
BIKF → KIAD
1
avg 5h 51m · Keflavik → Washington Dulles

Aircraft types

Equipment used on this number

6
B752 BOEING Boeing 757-200
13
A319 AIRBUS Airbus A319
8
B38M BOEING Boeing 737 MAX 8
7
B39M BOEING Boeing 737 MAX 9
6
A320 AIRBUS Airbus A320
5
B739 BOEING Boeing 737-900
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 UAL399

30
N14115BOEING Boeing 757-200
→
06/03/2026
2h 6m
No alerts
Replay Analysis
N14102BOEING Boeing 757-200
→
06/02/2026
1h 56m
No alerts
Replay Analysis
N14120BOEING Boeing 757-200
→
06/01/2026
2h 16m
No alerts
Replay Analysis
N33132BOEING Boeing 757-200
→
05/31/2026
1h 57m
No alerts
Replay Analysis
N14102BOEING Boeing 757-200
→
05/29/2026
21m
No alerts
Replay Analysis
N12116BOEING Boeing 757-200
→
05/28/2026
2h 8m
No alerts
Replay Analysis
N12114BOEING Boeing 757-200
→
05/27/2026
2h 21m
No alerts
Replay Analysis
N13110BOEING Boeing 757-200
→
05/26/2026
2h 4m
No alerts
Replay Analysis
N12116BOEING Boeing 757-200
→
05/25/2026
6h 2m
No alerts
Replay Analysis
N14115BOEING Boeing 757-200
→
05/24/2026
2h 20m
No alerts
Replay Analysis
N14115BOEING Boeing 757-200
→
05/24/2026
5m
No alerts
Replay Analysis
N14115BOEING Boeing 757-200
→
05/24/2026
5h 51m
No alerts
Replay Analysis
N19141BOEING Boeing 757-200
→
05/23/2026
2h 16m
No alerts
Replay Analysis
N17437BOEING Boeing 737 MAX 9
→
05/21/2026
3h 32m
No alerts
Replay Analysis
N836UAAIRBUS Airbus A319
→
05/20/2026
41m
No alerts
Replay Analysis
N491UAAIRBUS Airbus A320
→
05/18/2026
2h 30m
No alerts
Replay Analysis
N77575BOEING Boeing 737 MAX 9
→
05/18/2026
4h 24m
No alerts
Replay Analysis
N875UAAIRBUS Airbus A319
→
05/17/2026
40m
No alerts
Replay Analysis
N875UAAIRBUS Airbus A319
→
05/17/2026
11m
No alerts
Replay Analysis
N497UAAIRBUS Airbus A320
→
05/17/2026
2h 2m
No alerts
Replay Analysis
N68802BOEING Boeing 737-900
→
05/17/2026
3h 51m
No alerts
Replay Analysis
N878UAAIRBUS Airbus A319
→
05/15/2026
42m
No alerts
Replay Analysis
N449UAAIRBUS Airbus A320
→
05/15/2026
2h 5m
No alerts
Replay Analysis
N37560BOEING Boeing 737 MAX 9
→
05/15/2026
3h 49m
No alerts
Replay Analysis
N809UAAIRBUS Airbus A319
→
05/14/2026
38m
No alerts
Replay Analysis
N496UAAIRBUS Airbus A320
→
05/14/2026
2h 6m
No alerts
Replay Analysis
N37525BOEING Boeing 737 MAX 9
→
05/14/2026
3h 47m
No alerts
Replay Analysis
N835UAAIRBUS Airbus A319
→
05/13/2026
40m
No alerts
Replay Analysis
N835UAAIRBUS Airbus A319
→
05/13/2026
12m
No alerts
Replay Analysis
N485UAAIRBUS Airbus A320
→
05/13/2026
1h 55m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window