United Airlines UA521 Flight Status : Live Tracking & Updates

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 18:37 05 May 2026 America/New_York. The flight is expected to land at George Bush Intercontinental Airport at 23:35 05 May 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, 39 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, 39 minutes
Departure Hartsfield-Jackson Atlanta International Airport
IATA: ATLICAO: KATL
Scheduled 18:37 05 May 2026
Actual 18:27 05 May 2026
E 14
Arrival George Bush Intercontinental Airport
IATA: IAHICAO: KIAH
Scheduled 23:35 05 May 2026
Estimated 23:18 05 May 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: Boeing 737-800 (Scimitar Winglets) Passenger
  • Callsign: F-KIDA2
  • Departure Timezone: America/New_York
  • Arrival Timezone: America/Chicago
  • Current Time in Atlanta: Tuesday 2026-05-05 19:39 PM
  • Current Time in Houston: Tuesday 2026-05-05 18:39 PM

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
Mon 04 May
Scheduled On time
Atlanta (ATL) 2026-05-04T15:57
Houston (IAH) 2026-05-04T17:25
Sun 03 May
Scheduled On time
Atlanta (ATL) 2026-05-03T15:57
Houston (IAH) 2026-05-03T17:25
Sat 02 May
Scheduled On time
Atlanta (ATL) 2026-05-02T18:37
Houston (IAH) 2026-05-02T23:35
Thu 30 Apr
Departed On time
Atlanta (ATL) 2026-04-30T18:37
Houston (IAH) 2026-04-30T23:35
2026-04-30T19:19
Wed 29 Apr
Scheduled On time
Atlanta (ATL) 2026-04-29T15:57
Houston (IAH) 2026-04-29T17:25
Mon 27 Apr
Scheduled On time
Atlanta (ATL) 2026-04-27T18:42
Houston (IAH) 2026-04-27T23:40
Sun 26 Apr
Scheduled On time
Atlanta (ATL) 2026-04-26T18:42
Houston (IAH) 2026-04-26T23:40
Sat 25 Apr
Departed Delayed by 1h 17m
Atlanta (ATL) 2026-04-25T15:57
Houston (IAH) 2026-04-25T17:25
2026-04-25T17:31
Fri 24 Apr
Scheduled On time
Atlanta (ATL) 2026-04-24T18:42
Houston (IAH) 2026-04-24T23:40
Thu 23 Apr
Departed On time
Atlanta (ATL) 2026-04-23T15:57
Houston (IAH) 2026-04-23T17:25
2026-04-23T15:52

Flight routes similar to United Airlines UA521

Airline Flight no Departure Arrival
United Airlines UA425
United Airlines 		05/05/2026
11:45 		2 hours 2 minutes
13:14
WestJet WS6976
WestJet 		05/05/2026
14:30 		2 hours 5 minutes
15:44
Delta DL1284
Delta 		05/05/2026
20:20 		2 hours 15 minutes
21:35
Delta DL1131
Delta 		05/05/2026
18:18 		2 hours 15 minutes
19:33
KLM KL5229
KLM 		05/05/2026
18:18 		2 hours 15 minutes
19:33
Delta DL1601
Delta 		05/05/2026
22:44 		2 hours 15 minutes
23:59
Korean Air KE7166
Korean Air 		05/05/2026
12:41 		1 hours 57 minutes
13:51
LATAM Airlines LA7011
LATAM Airlines 		05/05/2026
16:36 		2 hours 15 minutes
17:51

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 Boeing 737-800 (Scimitar Winglets) Passenger aircraft.

When does the flight United Airlines UA521 arrive?

Flight United Airlines UA521 arrives at 23:35.

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 .