| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| May 20 | ONT | SFO | 19:56 | 20:55 |
Landed Late
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| May 19 | ONT | SFO | 19:53 | 21:08 |
Landed Late
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| May 18 | ONT | SFO | 19:22 | 20:57 |
Landed Late
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| May 17 | ONT | SFO | 19:28 | 20:39 |
Landed
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| May 16 | ONT | SFO | 19:27 | 20:28 |
Landed
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| May 15 | ONT | SFO | 20:17 | 21:18 |
Delayed
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| May 14 | ONT | SFO | 21:21 | 22:28 |
Delayed
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| May 13 | ONT | SFO | 19:42 | 20:42 |
Landed
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| May 12 | ONT | SFO | 20:23 | 21:25 |
Delayed
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| May 11 | ONT | SFO | 20:02 | 21:04 |
Landed Late
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United Airlines Flight UA1665 connects Ontario, United States to San Francisco, United States, taking off from Ontario International Airport ONT and landing at San Francisco International Airport SFO.
How long is the UA1665 flight from Ontario to San Francisco?
The average flight time from Ontario to San Francisco is 1 hour and 7 minutes. The flight distance is 585 km / 363 miles and the average flight speed is 532 km/h / 330 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA1665 Ontario to San Francisco?
The Airportia On-Time Performance Rating for United Airlines Flight UA1665 is 4.4/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA1665 arriving at?
Flight UA1665 arrives at San Francisco International Airport (SFO) Terminal 3.
When was the latest UA1665 flight?
The latest flight took off on Thursday, May 21st, 2026 with the flight status being Landed on 20:55.
How else can the flight UA1665 be referenced as?
This United Airlines flight can also be referenced as UAL1665, UA 1665, UAL 1665.
How often is flight UA1665 delayed?
On average, 90% of all UA1665 flights are delayed. The average delay is 42 minutes.
Can I get compensation for my delayed or cancelled UA1665 flight or baggage issues?
If your UA1665 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 UA1665 Flight Tracker above for more details.
Flight UA1665 is code-shared by 2 airlines using the flight numbers AC4112, CM2528
Other flights departing from Ontario ONT: AA4143, 5E2943, AS592, WN3681
Other flights arriving at San Francisco SFO: LO37, BF710, UA1166, UA477
All flights connecting Ontario ONT to San Francisco SFO.