| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Oct 25 | ONT | SFO | 14:17 | 15:13 |
Landed
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| Oct 24 | ONT | SFO | 13:59 | 14:56 |
Landed
|
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| Oct 23 | ONT | SFO | 14:07 | 15:03 |
Landed
|
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| Oct 22 | ONT | SFO | 14:11 | 15:10 |
Landed
|
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| Oct 21 | ONT | SFO | 14:28 | 15:30 |
Landed Late
|
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| Oct 20 | ONT | SFO | 14:30 | 15:27 |
Landed Late
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| Oct 19 | ONT | SFO | 14:15 | 15:10 |
Landed
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| Oct 18 | ONT | SFO | 14:06 | 14:58 |
Landed
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| Oct 17 | ONT | SFO | 14:02 | 15:01 |
Landed
|
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| Oct 16 | ONT | SFO | 14:21 | 15:33 |
Landed Late
|
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United Airlines Flight UA1840 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 UA1840 flight from Ontario to San Francisco?
The average flight time from Ontario to San Francisco is 58 minutes. The flight distance is 585 km / 363 miles and the average flight speed is 604 km/h / 375 mph.
What is the On-Time Performance (OTP) of United Airlines Flight UA1840 Ontario to San Francisco?
The Airportia On-Time Performance Rating for United Airlines Flight UA1840 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA1840 arriving at?
Flight UA1840 arrives at San Francisco International Airport (SFO) Terminal 3.
When was the latest UA1840 flight?
The latest flight took off on Saturday, October 25th, 2025 with the flight status being Landed on 15:13.
How else can the flight UA1840 be referenced as?
This United Airlines flight can also be referenced as UAL1840, UA 1840, UAL 1840.
How often is flight UA1840 delayed?
On average, 40% of all UA1840 flights are delayed. The average delay is 14 minutes.
Can I get compensation for my delayed or cancelled UA1840 flight or baggage issues?
If your UA1840 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 UA1840 Flight Tracker above for more details.
Flight UA1840 is code-shared by 1 airline using the flight number AC4015
Other flights departing from Ontario ONT: AS1111, WN2606, WN1122, 8C3508
Other flights arriving at San Francisco SFO: AS1132, UA352, WN1473, AS3272
All flights connecting Ontario ONT to San Francisco SFO.
