| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 27 | ATL | IAH | 16:59 | 17:30 |
Landed
|
Track > |
| May 20 | ATL | IAH | 16:57 | 17:39 |
Landed
|
Track > |
| May 19 | ATL | IAH | 16:05 | 17:01 |
Landed
|
Track > |
| May 18 | ATL | IAH | 16:18 | 17:09 |
Landed
|
Track > |
| May 17 | ATL | IAH | 17:20 | 18:15 |
Delayed
|
Track > |
| May 15 | ATL | IAH | 17:02 | 17:45 |
Landed Late
|
Track > |
| May 14 | ATL | IAH | 16:11 | 16:46 |
Landed
|
Track > |
| May 13 | ATL | IAH | 16:06 | 16:47 |
Landed
|
Track > |
| May 12 | ATL | IAH | 16:05 | 16:48 |
Landed
|
Track > |
| May 11 | ATL | IAH | 16:14 | 17:06 |
Landed
|
Track > |
United Airlines Flight UA521 connects Atlanta, United States to Houston, United States, taking off from Atlanta Hartsfield-Jackson International Airport ATL and landing at Houston George Bush Intercontinental Airport IAH.
How long is the UA521 flight from Atlanta to Houston?
The average flight time from Atlanta to Houston is 1 hour and 44 minutes. The flight distance is 1108 km / 688 miles and the average flight speed is 637 km/h / 396 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA521 Atlanta to Houston?
The Airportia On-Time Performance Rating for United Airlines Flight UA521 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA521 arriving at?
Flight UA521 arrives at Houston George Bush Intercontinental Airport (IAH) Terminal C.
When was the latest UA521 flight?
The latest flight took off on Saturday, June 27th, 2026 with the flight status being Landed on 17:30.
How else can the flight UA521 be referenced as?
This United Airlines flight can also be referenced as UAL521, UA0521, UA 521, UAL 521.
How often is flight UA521 delayed?
On average, 40% of all UA521 flights are delayed. The average delay is 22 minutes.
Can I get compensation for my delayed or cancelled UA521 flight or baggage issues?
If your UA521 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our UA521 Flight Tracker above for more details.
Flight UA521 is code-shared by 2 airlines using the flight numbers EK6006, NZ6337
Other flights departing from Atlanta ATL: DL5072, WN381, F93499, DL5179
Other flights arriving at Houston IAH: UA4847, UA1360, UA2726, Y47925
All flights connecting Atlanta ATL to Houston IAH.