UAL721 is operated by UNITED AIRLINES INC between General Edward Lawrence Logan International Airport (KBOS) and Washington Dulles International Airport (KIAD). The flight is most often flown by a BOEING Boeing 737-900. Typical block time is 1h 29m. SkyMeter has observed 87 legs of this flight number via ADS-B.

✈
FLIGHTS
87
last 90 days
⏱
AVG DURATION
1h 29m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 06/30/2026
first → last seen
🗺
ROUTES / TYPES
4 / 3
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

3
KBOS → KIAD
74
avg 1h 30m · General Edward Lawrence Logan → Washington Dulles
US-0568 → KIAD
2
avg 1h 18m · Tailwind Boston Seaplane Base → Washington Dulles
KBOS → KRIC
1
avg 2h 14m · General Edward Lawrence Logan → Richmond

Aircraft types

Equipment used on this number

3
B739 BOEING Boeing 737-900
79
B39M BOEING Boeing 737 MAX 9
6
B38M BOEING Boeing 737 MAX 8
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 UAL721

30
N37434BOEING Boeing 737-900
→
06/30/2026
1h 15m
No alerts
Replay Analysis
N38473BOEING Boeing 737-900
→
06/29/2026
1h 22m
No alerts
Replay Analysis
N65832BOEING Boeing 737-900
→
06/28/2026
1h 35m
No alerts
Replay Analysis
N66897BOEING Boeing 737-900
→
06/27/2026
1h 20m
No alerts
Replay Analysis
N38479BOEING Boeing 737-900
→
06/26/2026
1h 48m
No alerts
Replay Analysis
N37470BOEING Boeing 737-900
→
06/25/2026
1h 38m
No alerts
Replay Analysis
N38451BOEING Boeing 737-900
→
06/24/2026
1h 17m
No alerts
Replay Analysis
N17529BOEING Boeing 737 MAX 9
→
06/23/2026
1h 46m
No alerts
Replay Analysis
N61886BOEING Boeing 737-900
→
06/22/2026
1h 23m
No alerts
Replay Analysis
N62896BOEING Boeing 737-900
→
06/21/2026
1h 20m
No alerts
Replay Analysis
N67815BOEING Boeing 737-900
→
06/20/2026
1h 21m
No alerts
Replay Analysis
N17589BOEING Boeing 737 MAX 9
→
06/19/2026
1h 26m
No alerts
Replay Analysis
N37419BOEING Boeing 737-900
→
06/18/2026
1h 45m
No alerts
Replay Analysis
N66825BOEING Boeing 737-900
→
06/17/2026
1h 22m
No alerts
Replay Analysis
N37471BOEING Boeing 737-900
→
06/16/2026
1h 17m
No alerts
Replay Analysis
N62884BOEING Boeing 737-900
→
06/15/2026
1h 16m
No alerts
Replay Analysis
N66808BOEING Boeing 737-900
→
06/14/2026
1h 54m
No alerts
Replay Analysis
N37560BOEING Boeing 737 MAX 9
→
06/13/2026
1h 25m
No alerts
Replay Analysis
N38454BOEING Boeing 737-900
→
06/12/2026
1h 21m
No alerts
Replay Analysis
N38446BOEING Boeing 737-900
→
06/11/2026
1h 5m
No alerts
Replay Analysis
N75432BOEING Boeing 737-900
→
06/10/2026
1h 31m
No alerts
Replay Analysis
N69888BOEING Boeing 737-900
→
06/09/2026
1h 13m
No alerts
Replay Analysis
N38467BOEING Boeing 737-900
→
06/08/2026
1h 11m
No alerts
Replay Analysis
N62892BOEING Boeing 737-900
→
06/07/2026
1h 18m
No alerts
Replay Analysis
N36472BOEING Boeing 737-900
→
06/06/2026
1h 29m
No alerts
Replay Analysis
N37434BOEING Boeing 737-900
→
06/05/2026
1h 17m
No alerts
Replay Analysis
N68821BOEING Boeing 737-900
→
06/04/2026
1h 15m
No alerts
Replay Analysis
N68843BOEING Boeing 737-900
→
06/03/2026
1h 12m
No alerts
Replay Analysis
N28457BOEING Boeing 737-900
→
06/02/2026
1h 10m
No alerts
Replay Analysis
N38479BOEING Boeing 737-900
→
06/01/2026
1h 27m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window