| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Dec 01 | IAH | SFO | 19:31 | 21:04 |
Landed
|
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| Nov 30 | IAH | SFO | 21:25 | 22:53 |
Delayed
|
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| Nov 29 | IAH | SFO | 21:10 | 22:45 |
Delayed
|
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| Nov 28 | IAH | SFO | 19:15 | 21:04 |
Landed
|
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| Nov 27 | IAH | SFO | 19:10 | 20:48 |
Landed
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| Nov 26 | IAH | SFO | 19:17 | 20:43 |
Landed
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| Nov 25 | IAH | SFO | 20:14 | 21:41 |
Landed Late
|
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| Nov 24 | IAH | SFO | 21:16 | 22:47 |
Delayed
|
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| Nov 23 | IAH | SFO | 19:19 | 20:57 |
Landed
|
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| Nov 22 | IAH | SFO | 19:18 | 20:47 |
Landed
|
Track > |
United Airlines Flight UA1521 connects Houston, United States to San Francisco, United States, taking off from Houston George Bush Intercontinental Airport IAH and landing at San Francisco International Airport SFO.
How long is the UA1521 flight from Houston to San Francisco?
The average flight time from Houston to San Francisco is 3 hours and 33 minutes. The flight distance is 2627 km / 1632 miles and the average flight speed is 739 km/h / 459 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA1521 Houston to San Francisco?
The Airportia On-Time Performance Rating for United Airlines Flight UA1521 is 4.5/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA1521 arriving at?
Flight UA1521 arrives at San Francisco International Airport (SFO) Terminal 3.
When was the latest UA1521 flight?
The latest flight took off on Tuesday, December 2nd, 2025 with the flight status being Landed on 21:04.
How else can the flight UA1521 be referenced as?
This United Airlines flight can also be referenced as UAL1521, UA 1521, UAL 1521.
How often is flight UA1521 delayed?
On average, 40% of all UA1521 flights are delayed. The average delay is 78 minutes.
Can I get compensation for my delayed or cancelled UA1521 flight or baggage issues?
If your UA1521 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 UA1521 Flight Tracker above for more details.
Flight UA1521 is code-shared by 4 airlines using the flight numbers EK6155, NZ9209, OZ9522, VA8071
Other flights departing from Houston IAH: AA1656, OO5075, NK2327, Y42135
Other flights arriving at San Francisco SFO: AI179, AS3100, UA1168, AS3325
All flights connecting Houston IAH to San Francisco SFO.
