UAL255 is operated by UNITED AIRLINES INC between Appleton International Airport (KATW) and Denver International Airport (KDEN). The flight is most often flown by a AIRBUS Airbus A319. Typical block time is 1h 59m. SkyMeter has observed 96 legs of this flight number via ADS-B.

✈
FLIGHTS
96
last 90 days
⏱
AVG DURATION
1h 59m
tracked time
📅
SERVICE PERIOD
05/31/2025 → 07/19/2026
first → last seen
🗺
ROUTES / TYPES
9 / 6
city pairs · airframes
⚠
INCIDENT RATE
2.1%
2 flagged

Routes flown

By count · last 90 days

4
KATW → KDEN
51
avg 2h 25m · Appleton → Denver
KATL → KEWR
14
avg 1h 50m · Hartsfield Jackson Atlanta → Newark Liberty
KORD → KSAV
7
avg 1h 46m · Chicago O'Hare → Savannah Hilton Head
KAUS → KLAX
1
avg 3h 19m · Austin Bergstrom → Los Angeles

Aircraft types

Equipment used on this number

6
A319 AIRBUS Airbus A319
49
A320 AIRBUS Airbus A320
26
B38M BOEING Boeing 737 MAX 8
14
B739 BOEING Boeing 737-900
5
B738 BOEING Boeing 737-800
1
B39M BOEING Boeing 737 MAX 9
1

Safety profile

Flagged flights · last 90 days

Go-arounds
1
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 UAL255

30
N457UAAIRBUS Airbus A320
→
07/19/2026
17m
No alerts
Replay Analysis
N457UAAIRBUS Airbus A320
→
07/19/2026
2h 9m
No alerts
Replay Analysis
N493UAAIRBUS Airbus A320
→
07/18/2026
22m
No alerts
Replay Analysis
N493UAAIRBUS Airbus A320
→
07/18/2026
2h 8m
No alerts
Replay Analysis
N461UAAIRBUS Airbus A320
→
07/17/2026
16m
No alerts
Replay Analysis
N461UAAIRBUS Airbus A320
→
07/17/2026
2h 12m
No alerts
Replay Analysis
N883UAAIRBUS Airbus A319
→
07/16/2026
2h 15m
No alerts
Replay Analysis
N883UAAIRBUS Airbus A319
→
07/15/2026
2h 14m
No alerts
Replay Analysis
N828UAAIRBUS Airbus A319
→
07/14/2026
2h 9m
No alerts
Replay Analysis
N898UAAIRBUS Airbus A319
→
07/13/2026
11m
No alerts
Replay Analysis
N898UAAIRBUS Airbus A319
→
07/13/2026
2h 5m
No alerts
Replay Analysis
N872UAAIRBUS Airbus A319
→
07/12/2026
2h 9m
No alerts
Replay Analysis
N836UAAIRBUS Airbus A319
→
07/11/2026
14m
No alerts
Replay Analysis
N836UAAIRBUS Airbus A319
→
07/11/2026
2h 10m
No alerts
Replay Analysis
N897UAAIRBUS Airbus A319
→
07/10/2026
18m
No alerts
Replay Analysis
N897UAAIRBUS Airbus A319
→
07/10/2026
2h 25m
No alerts
Replay Analysis
N832UAAIRBUS Airbus A319
→
07/09/2026
2h 23m
No alerts
Replay Analysis
N891UAAIRBUS Airbus A319
→
07/08/2026
2h 24m
No alerts
Replay Analysis
N881UAAIRBUS Airbus A319
→
07/07/2026
2h 14m
No alerts
Replay Analysis
N897UAAIRBUS Airbus A319
→
07/06/2026
2h 31m
No alerts
Replay Analysis
N821UAAIRBUS Airbus A319
→
07/04/2026
26m
No alerts
Replay Analysis
N821UAAIRBUS Airbus A319
→
07/04/2026
2h 9m
No alerts
Replay Analysis
N465UAAIRBUS Airbus A320
→
07/03/2026
2h 34m
No alerts
Replay Analysis
N838UAAIRBUS Airbus A319
→
07/01/2026
2h 30m
No alerts
Replay Analysis
N846UAAIRBUS Airbus A319
→
06/30/2026
2h 24m
No alerts
Replay Analysis
N803UAAIRBUS Airbus A319
→
06/29/2026
18m
No alerts
Replay Analysis
N803UAAIRBUS Airbus A319
→
06/29/2026
2h 24m
No alerts
Replay Analysis
N476UAAIRBUS Airbus A320
→
06/28/2026
2h 35m
No alerts
Replay Analysis
N879UAAIRBUS Airbus A319
→
06/27/2026
2h 25m
No alerts
Replay Analysis
N846UAAIRBUS Airbus A319
→
06/26/2026
2h 27m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window