Flight Status & Tracker

UAL421

UNITED AIRLINES INC · DEN → IAD · Last tracked Oct 21, 2026

UAL421 is a flight number operated by UNITED AIRLINES INC between Denver International Airport (KDEN) and Washington Dulles International Airport (KIAD). SkyMeter last tracked UAL421 on October 21, 2026. The flight is most often flown by a AIRBUS Airbus A321 Neo. Typical block time is 2h 25m. SkyMeter has observed 154 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
154
last 90 days
⏱
AVG DURATION
2h 25m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 10/21/2026
first → last seen
🗺
ROUTES / TYPES
7 / 7
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

3
KDEN → KIAD
67
avg 3h 23m · Denver → Washington Dulles
KIAD → KORD
52
avg 2h 0m · Washington Dulles → Chicago O'Hare
KSJC → KDEN
4
avg 2h 33m · Norman Y. Mineta San Jose → Denver

Aircraft types

Equipment used on this number

7
A21N AIRBUS Airbus A321 Neo
213
B739 BOEING Boeing 737-900
22
B38M BOEING Boeing 737 MAX 8
16
B738 BOEING Boeing 737-800
12
ST75 ST75
6
A319 AIRBUS Airbus A319
2
B39M BOEING Boeing 737 MAX 9
2

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 UAL421

30
N14554AIRBUS Airbus A321 Neo
→
10/21/2026
1h 0m
No alerts
Replay Analysis
N14569AIRBUS Airbus A321 Neo
→
10/20/2026
1h 14m
No alerts
Replay Analysis
N14541AIRBUS Airbus A321 Neo
→
10/19/2026
1h 8m
No alerts
Replay Analysis
N14541AIRBUS Airbus A321 Neo
→
10/18/2026
3h 29m
No alerts
Replay Analysis
N14541AIRBUS Airbus A321 Neo
→
10/18/2026
2h 20m
No alerts
Replay Analysis
N38443BOEING Boeing 737-900
→
10/18/2026
2h 16m
No alerts
Replay Analysis
N69804BOEING Boeing 737-900
→
10/18/2026
6m
No alerts
Replay Analysis
N69804BOEING Boeing 737-900
→
10/18/2026
1h 47m
No alerts
Replay Analysis
N14521AIRBUS Airbus A321 Neo
→
10/18/2026
1h 21m
No alerts
Replay Analysis
N14566AIRBUS Airbus A321 Neo
→
10/17/2026
1h 56m
No alerts
Replay Analysis
N14523AIRBUS Airbus A321 Neo
→
10/16/2026
2h 49m
No alerts
Replay Analysis
N14523AIRBUS Airbus A321 Neo
→
10/16/2026
1h 10m
No alerts
Replay Analysis
N14523AIRBUS Airbus A321 Neo
→
10/15/2026
3h 12m
No alerts
Replay Analysis
N14523AIRBUS Airbus A321 Neo
→
10/15/2026
2h 1m
No alerts
Replay Analysis
N69833BOEING Boeing 737-900
→
10/15/2026
2h 50m
No alerts
Replay Analysis
N34547AIRBUS Airbus A321 Neo
→
10/15/2026
5m
No alerts
Replay Analysis
N34547AIRBUS Airbus A321 Neo
→
10/15/2026
2h 35m
No alerts
Replay Analysis
N14544AIRBUS Airbus A321 Neo
→
10/15/2026
58m
No alerts
Replay Analysis
N64572
→
10/14/2026
53m
No alerts
Replay Analysis
N24568
→
10/13/2026
1h 18m
No alerts
Replay Analysis
N36469BOEING Boeing 737-900
→
10/10/2026
2h 12m
No alerts
Replay Analysis
N24555AIRBUS Airbus A321 Neo
→
10/10/2026
1h 56m
No alerts
Replay Analysis
N68801BOEING Boeing 737-900
→
10/10/2026
1h 13m
No alerts
Replay Analysis
N68801BOEING Boeing 737-900
→
10/9/2026
3h 27m
No alerts
Replay Analysis
N68801BOEING Boeing 737-900
→
10/9/2026
2h 14m
No alerts
Replay Analysis
N24508AIRBUS Airbus A321 Neo
→
10/9/2026
1h 56m
No alerts
Replay Analysis
N34551AIRBUS Airbus A321 Neo
→
10/9/2026
1h 14m
No alerts
Replay Analysis
N34551AIRBUS Airbus A321 Neo
→
10/8/2026
3h 18m
No alerts
Replay Analysis
N34551AIRBUS Airbus A321 Neo
→
10/8/2026
2h 4m
No alerts
Replay Analysis
N75432BOEING Boeing 737-900
→
10/8/2026
2h 33m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window