United Airlines UA521 Flight Status Today

Domestic flight United Airlines UA521 takes off from Atlanta (ATL) United States to Houston (IAH) United States. It's operated by United Airlines. The plane leaves Hartsfield-Jackson Atlanta International Airport at 18:42 08 April 2026 America/New_York. The flight is expected to land at George Bush Intercontinental Airport at 23:40 08 April 2026 America/Chicago. The flight will last about 3 hours 58 minutes.

Current status of UA521 is Departed On time Estimated Arrival in 4 hours, 21 minutes

UA521 - UAL521 United Airlines (UA)
ATL Atlanta United States
Flight ATL to IAH
IAH Houston United States
Departed On time Estimated Arrival in 4 hours, 21 minutes
Departure Hartsfield-Jackson Atlanta International Airport
IATA: ATLICAO: KATL
Scheduled 18:42 08 April 2026
Actual 18:27 08 April 2026
E 11
Arrival George Bush Intercontinental Airport
IATA: IAHICAO: KIAH
Scheduled 23:40 08 April 2026
Estimated 23:13 08 April 2026
B B28
UA521 Detail
  • Type: Domestic Flight
  • Code Shares: NZ 6393
  • Flight Duration: 3 hours 58 minutes
  • Flight Distance: 1108 kms / 688 miles
Airline
  • United Airlines
  • IATA: UA
  • ICAO: UAL
  • Operating Days: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Passenger Services
  • Service type: Normal passenger
  • Seats: 167
  • Freight capacity: 17.1 tons
  • Passenger classes: First Class, Economy, Business Class, Shuttle
More Detail
  • Aircraft: Airbus A320
  • Callsign: F-KIDA2
  • Departure Timezone: America/New_York
  • Arrival Timezone: America/Chicago
  • Current Time in Atlanta: Wednesday 2026-04-08 19:52 PM
  • Current Time in Houston: Wednesday 2026-04-08 18:52 PM

United Airlines UA521 Flight Statistics

United Airlines
United Airlines
FLIGHT NO UA521
AIRPLANE Airbus A320
ON TIME 9
DELAYED 5
CANCELLED 0
ON TIME 25
DELAYED 5
CANCELLED 0
ON TIME 49
DELAYED 10
CANCELLED 0
ON TIME 65
DELAYED 12
CANCELLED 0
Last 14 days flight data
14 30 60 90
On Time Rate

United Airlines UA521 Flight Schedule and Histories

Time Departure Arrival Actual departure Actual arrival
Mon 06 Apr
Scheduled On time
Atlanta (ATL) 2026-04-06T15:57
Houston (IAH) 2026-04-06T17:25
Sat 04 Apr
Departed Delayed by 57m
Atlanta (ATL) 2026-04-04T18:42
Houston (IAH) 2026-04-04T23:40
2026-04-04T19:25
Fri 03 Apr
Scheduled On time
Atlanta (ATL) 2026-04-03T18:42
Houston (IAH) 2026-04-03T23:40
Thu 02 Apr
Scheduled On time
Atlanta (ATL) 2026-04-02T18:42
Houston (IAH) 2026-04-02T23:40
Wed 01 Apr
Scheduled On time
Atlanta (ATL) 2026-04-01T18:42
Houston (IAH) 2026-04-01T23:40
Mon 30 Mar
Scheduled On time
Atlanta (ATL) 2026-03-30T18:42
Houston (IAH) 2026-03-30T23:40
Sun 29 Mar
Scheduled On time
Atlanta (ATL) 2026-03-29T18:42
Houston (IAH) 2026-03-29T23:40
Sat 28 Mar
Scheduled On time
Atlanta (ATL) 2026-03-28T15:57
Houston (IAH) 2026-03-28T17:25
Mon 23 Mar
Scheduled On time
Atlanta (ATL) 2026-03-23T15:57
Houston (IAH) 2026-03-23T17:25
Sun 22 Mar
Scheduled On time
Atlanta (ATL) 2026-03-22T15:57
Houston (IAH) 2026-03-22T17:25

Flight routes similar to United Airlines UA521

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United Airlines UA532
United Airlines 		08/04/2026
07:00 		2 hours 36 minutes
08:21
Spirit Airlines NK1155
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09:05 		0 minutes
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Delta DL1601
Delta 		08/04/2026
22:40 		2 hours 19 minutes
23:59
Delta DL1284
Delta 		08/04/2026
19:53 		2 hours 16 minutes
21:09
Delta DL1131
Delta 		08/04/2026
16:43 		2 hours 15 minutes
17:58
Korean Air KE7075
Korean Air 		08/04/2026
22:40 		2 hours 19 minutes
23:59
Frontier Airlines F92399
Frontier Airlines 		08/04/2026
06:00 		2 hours 2 minutes
07:29
United Airlines UA1012
United Airlines 		08/04/2026
09:10 		2 hours 2 minutes
10:37

United Airlines Flight UA521 FAQs

What is the scheduled flight duration for United Airlines UA521 flight?

On average, nonstop flight takes 3 hour(s) 58 minutes, with the flight distance of 1108 km (688 miles).

What is the current status of United Airlines UA521 flight?

The current status of flight United Airlines UA521 is Departed On time.

What type of aircraft is used for the United Airlines UA521 flight?

All United Airlines UA521 flights are operated using Airbus A320 aircraft.

When does the flight United Airlines UA521 arrive?

Flight United Airlines UA521 arrives at 23:40.

Which terminal the flight United Airlines UA521 is arriving at?

Flight United Airlines UA521 arrives in George Bush Intercontinental Airport at Terminal B.

How many United Airlines UA521 flights are operated a week?

7 flights per week. The Flight United Airlines UA521 is operated on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday .