United Airlines UA521 Flight status
According to Trip.com real-time data, the UA521 flight operated by United Airlines on Nov 11, 2026 is scheduled to fly from Atlanta (ATL) to Boston (BOS). The flight is expected to depart at 15:57 and arrive at 23:25 .
Tue, Nov 10
Wed, Nov 11
Thu, Nov 12
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Arrived
The flight has arrived 22m early
3h 50m
Check-in Counter
--
Boarding Gate
C11
Arrival Gate
B28
Baggage
6
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Scheduled
Your flight will depart on time.
7h 28m
IAH
1h 54m
Check-in Counter
--
Boarding Gate
T18
Arrival Gate
B27
Baggage
6
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Scheduled
Your flight will depart on time.
7h 28m
IAH
1h 14m
Check-in Counter
--
Boarding Gate
--
Arrival Gate
--
Baggage
6
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Need a flight from Atlanta to Boston?
United Airlines From €176
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Track the Previous Flight Status: Scheduled
UA1746
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Houston (HOU)
Atlanta (ATL)
Atlanta (ATL)
Scheduled: 15:01
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UA521 Aircraft Details
According to Trip.com real-time data, the UA521 flight from Atlanta to Boston on 11/11/2026 is operated using the aircraft model Airbus A320. This aircraft has been in service for 3y, 7m. The aircraft has 166 seats.
Airbus A320
Punctuality (Departure)
69
%
Punctuality (Arrival)
92
%
Late on average
0 minutes
Age
3y, 7m
Seats
166
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
None
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
76 cm
More legroom than on 3% of flights
43 cm
Seat width
100°
Reclining Angle
--
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
94 cm
Legroom
53 cm
Seat width better than on 75% of flights
120°
Reclining Angle
--
Seat layout example
In-Flight Services
None
On-demand entertainment
Wi-Fi is available
USB port and power outlet
Seat Information
86 cm
Legroom
43 cm
Seat width
100°
Reclining Angle
--
Seat layout example
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Flight History for UA521
Trip.com historical records show that the last UA521 flight departed on Tue, Nov 10 from ATL at approximately 18:51. This flight is expected to arrrive in BOS at 23:03.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Fri, Nov 6 | Atlanta (ATL) | Boston (BOS) | B38M | 16:22 | 23:11 | Arrived |
| Sat, Nov 7 | Atlanta (ATL) | Boston (BOS) | 738 | 16:25 | 23:36 | Arrived |
| Sun, Nov 8 | Atlanta (ATL) | Boston (BOS) | B38M | 16:13 | 23:11 | Arrived |
| Mon, Nov 9 | Atlanta (ATL) | Boston (BOS) | B38M | 17:07 | 23:05 | Arrived |
| Tue, Nov 10 | Houston (IAH) | Boston (BOS) | 738 | 18:51 | 23:03 | Arrived |
| Wed, Nov 11 | Atlanta (ATL) | Boston (BOS) | B38M | 15:57 | 23:25 | Scheduled |
| Thu, Nov 12 | Atlanta (ATL) | Boston (BOS) | 738 | 15:57 | 23:25 | Scheduled |
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UA521 On-Time Performance
Based on the average performance of this flight over the last 30 trips, the on-time departure rate of UA521 is 69% (Late on average 53 minutes), and the on-time arrival rate is 92% (Early on average 0 minutes).
On-Time Departures
Punctuality
69
%
Late on average
53 minutes
Early
0
%
On time
69
%
30 mins late
8
%
60 mins late
8
%
90 mins late
15
%
Cancelled
0
%
On-Time Arrivals
Punctuality
92
%
Early on average
0 minutes
Early
77
%
On time
15
%
30 mins late
0
%
60 mins late
0
%
90 mins late
8
%
Cancelled
0
%
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Flight FAQs
What is the current status of flight ua521?
Flight ua521 has not departed yet and is currently on schedule. Scheduled departure 15:57, arrival 23:25 (updated Nov 11, 2026).Is flight ua521 on time today?
Flight ua521 has not departed yet and is currently on schedule. Scheduled departure is 15:57, with arrival at 23:25. Recheck gate and timing before you head to the airport.Has flight ua521 departed yet? What is the departure time?
Flight ua521 is scheduled to depart at 15:57. The latest actual or estimated departure time is 15:57, and the current status is Scheduled (updated Nov 11, 2026).When is flight ua521 scheduled to arrive?
Flight ua521 is scheduled to arrive at 23:25. The latest estimated or actual arrival time is 23:25. Status is Scheduled as of Nov 11, 2026.What is the gate information for flight ua521?
For flight ua521, the departure terminal is D and the boarding gate is T18. Gate assignments can change at short notice—confirm on airport screens before heading to security.What is the baggage carousel number for flight ua521?
After arrival, baggage for flight ua521 is expected at carousel 6 in terminal B. Carousel numbers are assigned close to landing and may change—follow airport signs on arrival.What route does flight ua521 fly?
Flight ua521 is operated by United Airlines from Atlanta (ATL) to Boston (BOS). Typical flight time is about 7 hours 28 minutes; operating days may include Wednesday.How can I check real-time status for flight ua521?
Track flight ua521 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.If flight ua521 is delayed or canceled, what should I do?
If ua521 is delayed or canceled, first confirm the latest status here (Scheduled, updated Nov 11, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.Has flight ua521 departed from Atlanta?
Flight ua521 has not departed from Atlanta (ATL) yet and is currently on schedule for 15:57.
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Arrival Info: Boston Weather & Current Time
Clear
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8°C - 12°C
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Time on arrival: Atlanta 23:25
|
Boston 23:25
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