United Airlines UA721 Flight Status
According to Trip.com real-time data, the UA721 flight operated by United Airlines on Apr 17, 2026 is scheduled to fly from Boston (BOS) to Washington D.C. (IAD). The flight is expected to depart at 2:37 PM and land at 3:51 PM .
Thu, Apr 16
Fri, Apr 17
Sat, Apr 18
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Arrived
The flight has arrived 22m early
1h 46m
Check-in Counter
--
Boarding Gate
B27
Arrival Gate
D1
Baggage
2
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Scheduled
Your flight will depart on time.
1h 46m
Check-in Counter
--
Boarding Gate
B27
Arrival Gate
D3
Baggage
--
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Scheduled
Your flight will depart on time.
1h 46m
Check-in Counter
--
Boarding Gate
--
Arrival Gate
--
Baggage
--
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Information provided by VariFlightVariFlight. For real-time updates, please check airport displays or contact your airline. If this is not your flight, you can browse more options for flights from Boston to Washington D.C. to find your schedule.
Track the Previous Flight Status: Scheduled
UA1183
|
New York (NYC) 
Boston (BOS)
Boston (BOS)Scheduled: 1:29 PM
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UA721 Aircraft Details
According to Trip.com real-time data, the UA721 flight flying from Boston to Washington D.C. on 4/17/2026 is operated by the aircraft model Boeing 737-900. This aircraft has been in service for 12y, 10m. The aircraft is equipped with 179 seats.
Boeing 737-900
Punctuality (Departure)
87%
Punctuality (Arrival)
93%
Early on average
6 minutes
Age
12y, 10m
Seats
179
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
76 cm
Legroom
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
94 cm
Legroom
--
Seat width
120°
Reclining Angle
2-2
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
86 cm
Legroom
44 cm
Seat width better than on 67% of flights
105°
Reclining Angle
3-3
Seat layout example
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Flight History for UA721
Trip.com historical records show that the last UA721 flight departed on Thu, Apr 16 from BOS at approximately 2:45 PM. This flight is expected to arrrive in IAD at 4:01 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Sun, Apr 12 | Boston (BOS) | Washington D.C. (IAD) | B38M | 2:53 PM | 4:08 PM | Arrived |
| Mon, Apr 13 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:51 PM | 4:07 PM | Arrived |
| Tue, Apr 14 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:48 PM | 4:01 PM | Arrived |
| Wed, Apr 15 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:47 PM | 3:56 PM | Arrived |
| Thu, Apr 16 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:45 PM | 4:01 PM | Arrived |
| Fri, Apr 17 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:37 PM | 3:51 PM | Scheduled |
| Sat, Apr 18 | Boston (BOS) | Washington D.C. (IAD) | 739 | 2:37 PM | 4:23 PM | Scheduled |
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UA721 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA721 is 87% (Late on average 23 minutes), and the on-time arrival rate is 93% (Early on average 6 minutes).
On-Time Departures
Punctuality
87%
Late on average 23 minutes
Early
0%
On time
87%
30 mins late
10%
60 mins late
0%
90 mins late
3%
Canceled
0%
On-Time Arrivals
Punctuality
93%
Early on average 6 minutes
Early
77%
On time
17%
30 mins late
3%
60 mins late
0%
90 mins late
3%
Canceled
0%
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Arrival Info: Washington D.C. Weather & Current Time
Partly clear
|
20°C - 35°C
Weather forecast for your arrival day
0 hour time difference
Time on arrival: Boston 16:23| Washington D.C. 16:23
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