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 16:02 27 February 2026 America/New_York. The flight is expected to land at George Bush Intercontinental Airport at 17:32 27 February 2026 America/Chicago. The flight will last about 2 hours 30 minutes.

Current status of UA521 is Scheduled On time Estimated Depart in 4 hours, 52 minutes

UA521 - UAL521 United Airlines (UA)
ATL Atlanta United States
Flight ATL to IAH
IAH Houston United States
Scheduled On time Estimated Depart in 4 hours, 52 minutes
Departure Hartsfield-Jackson Atlanta International Airport
IATA: ATLICAO: KATL
Scheduled 16:02 27 February 2026
Estimated 16:02 27 February 2026
N T20
Arrival George Bush Intercontinental Airport
IATA: IAHICAO: KIAH
Scheduled 17:32 27 February 2026
Estimated 17:32 27 February 2026
D 4
UA521 Detail
  • Type: Domestic Flight
  • Code Shares: NZ 6337
  • Flight Duration: 2 hours 30 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: Boeing 737-800 (Scimitar Winglets) Passenger
  • Callsign: F-KIDA2
  • Departure Timezone: America/New_York
  • Arrival Timezone: America/Chicago
  • Current Time in Atlanta: Friday 2026-02-27 11:10 AM
  • Current Time in Houston: Friday 2026-02-27 10:10 AM

United Airlines UA521 Flight Statistics

United Airlines
United Airlines
FLIGHT NO UA521
AIRPLANE Boeing 737-800 (Scimitar Winglets) Passenger
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
Thu 26 Feb
Scheduled On time
Atlanta (ATL) 2026-02-26T16:02
Houston (IAH) 2026-02-26T17:32
Fri 20 Feb
Departed On time
Atlanta (ATL) 2026-02-20T18:43
Houston (IAH) 2026-02-20T23:12
2026-02-20T18:43
Mon 16 Feb
Departed On time
Atlanta (ATL) 2026-02-16T18:43
Houston (IAH) 2026-02-16T23:12
2026-02-16T18:44
Sun 15 Feb
Departed On time
Atlanta (ATL) 2026-02-15T16:02
Houston (IAH) 2026-02-15T17:32
2026-02-15T16:05
Fri 13 Feb
Scheduled On time
Atlanta (ATL) 2026-02-13T16:02
Houston (IAH) 2026-02-13T17:32
Tue 10 Feb
Arrived On time
Atlanta (ATL) 2026-02-10T18:29
Houston (IAH) 2026-02-10T19:59
2026-02-10T18:41
2026-02-10T20:12
Sun 08 Feb
Scheduled On time
Atlanta (ATL) 2026-02-08T18:25
Houston (IAH) 2026-02-08T19:56
Sat 07 Feb
Scheduled On time
Atlanta (ATL) 2026-02-07T16:42
Houston (IAH) 2026-02-07T19:10
Fri 06 Feb
Arrived Delayed by 44m
Atlanta (ATL) 2026-02-06T18:17
Houston (IAH) 2026-02-06T19:48
2026-02-06T19:02
2026-02-06T20:32
Thu 05 Feb
Scheduled On time
Atlanta (ATL) 2026-02-05T18:17
Houston (IAH) 2026-02-05T19:48

Flight routes similar to United Airlines UA521

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00:11
Korean Air KE7166
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13:59 		2 hours 17 minutes
15:16
WestJet WS5547
WestJet 		27/02/2026
13:59 		2 hours 17 minutes
15:16
LATAM Airlines LA6254
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07:25 		2 hours 24 minutes
08:49

United Airlines Flight UA521 FAQs

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

On average, nonstop flight takes 2 hour(s) 30 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 Scheduled On time.

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

All United Airlines UA521 flights are operated using Boeing 737-800 (Scimitar Winglets) Passenger aircraft.

When does the flight United Airlines UA521 arrive?

Flight United Airlines UA521 arrives at 17:32.

Which terminal the flight United Airlines UA521 is arriving at?

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

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 .