Flight Status & Tracker

UAL644

UNITED AIRLINES INC · DFW → DEN · Last tracked Sep 27, 2026

UAL644 is a flight number operated by UNITED AIRLINES INC between Dallas Fort Worth International Airport (KDFW) and Denver International Airport (KDEN). SkyMeter last tracked UAL644 on September 27, 2026. The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 1h 56m. SkyMeter has observed 171 legs of this flight number via ADS-B.

SkyMeter tracks historical flight activity from ADS-B data — this is not a live gate-to-gate status feed.

✈
FLIGHTS
171
last 90 days
⏱
AVG DURATION
1h 56m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/27/2026
first → last seen
🗺
ROUTES / TYPES
8 / 4
city pairs · airframes
⚠
INCIDENT RATE
1.8%
3 flagged

Routes flown

By count · last 90 days

3
KDFW → KDEN
76
avg 1h 46m · Dallas Fort Worth → Denver
KDEN → KPDX
68
avg 2h 30m · Denver → Portland
KLGA → KDEN
2
avg 4h 15m · La Guardia → Denver

Aircraft types

Equipment used on this number

4
B738 BOEING Boeing 737-800
92
A21N AIRBUS Airbus A321 Neo
39
B739 BOEING Boeing 737-900
36
A319 AIRBUS Airbus A319
2

Safety profile

Flagged flights · last 90 days

Go-arounds
3
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 UAL644

30
N54558AIRBUS Airbus A321 Neo
→
9/27/2026
11m
No alerts
Replay Analysis
N54558AIRBUS Airbus A321 Neo
→
9/27/2026
4h 23m
No alerts
Replay Analysis
N14565AIRBUS Airbus A321 Neo
→
9/25/2026
19m
No alerts
Replay Analysis
N14565AIRBUS Airbus A321 Neo
→
9/25/2026
3h 58m
No alerts
Replay Analysis
N14509AIRBUS Airbus A321 Neo
→
9/24/2026
2h 53m
No alerts
Replay Analysis
N24519AIRBUS Airbus A321 Neo
→
9/24/2026
4h 7m
No alerts
Replay Analysis
N14515AIRBUS Airbus A321 Neo
→
9/23/2026
2h 31m
No alerts
Replay Analysis
N37252BOEING Boeing 737-800
→
9/23/2026
1h 47m
No alerts
Replay Analysis
N14503AIRBUS Airbus A321 Neo
→
9/22/2026
2h 34m
No alerts
Replay Analysis
N14235BOEING Boeing 737-800
→
9/22/2026
1h 45m
No alerts
Replay Analysis
N24513AIRBUS Airbus A321 Neo
→
9/21/2026
2h 29m
No alerts
Replay Analysis
N79521BOEING Boeing 737-800
→
9/21/2026
1h 43m
No alerts
Replay Analysis
N74532AIRBUS Airbus A321 Neo
→
9/20/2026
2h 50m
No alerts
Replay Analysis
N76269BOEING Boeing 737-800
→
9/20/2026
1h 39m
No alerts
Replay Analysis
N76269BOEING Boeing 737-800
→
9/20/2026
8m
No alerts
Replay Analysis
N14576
→
9/19/2026
2h 35m
No alerts
Replay Analysis
N823UAAIRBUS Airbus A319
→
9/19/2026
1h 58m
No alerts
Replay Analysis
N14541AIRBUS Airbus A321 Neo
→
9/18/2026
2h 41m
No alerts
Replay Analysis
N87512BOEING Boeing 737-800
→
9/18/2026
1h 39m
No alerts
Replay Analysis
N87512BOEING Boeing 737-800
→
9/18/2026
5m
No alerts
Replay Analysis
N14520AIRBUS Airbus A321 Neo
→
9/17/2026
2h 37m
No alerts
Replay Analysis
N33266BOEING Boeing 737-800
→
9/17/2026
1h 41m
No alerts
Replay Analysis
N24573
→
9/16/2026
2h 29m
No alerts
Replay Analysis
N35260BOEING Boeing 737-800
→
9/16/2026
1h 55m
No alerts
Replay Analysis
N14242BOEING Boeing 737-800
→
9/15/2026
2h 2m
No alerts
Replay Analysis
N14242BOEING Boeing 737-800
→
9/15/2026
10m
No alerts
Replay Analysis
N14242BOEING Boeing 737-800
→
9/15/2026
29m
No alerts
Replay Analysis
N14527AIRBUS Airbus A321 Neo
→
9/14/2026
2h 39m
No alerts
Replay Analysis
N86534BOEING Boeing 737-800
→
9/14/2026
2h 9m
No alerts
Replay Analysis
N24537AIRBUS Airbus A321 Neo
→
9/12/2026
2h 35m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window