| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Oct 19 | ONT | SFO | 16:42 | 17:39 |
Landed
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| Oct 18 | ONT | SFO | 17:06 | 18:09 |
Landed Late
|
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| Oct 17 | ONT | SFO | 11:36 | 12:33 |
Landed
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| Oct 15 | ONT | SFO | 16:28 | 17:31 |
Landed
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| Oct 14 | ONT | SFO | 16:39 | 17:40 |
Landed
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| Oct 12 | ONT | SFO | 09:57 | 11:04 |
Landed
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| Oct 11 | ONT | SFO | 10:41 | 11:39 |
Landed Late
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| Oct 10 | ONT | SFO | 12:21 | 13:23 |
Delayed
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| Oct 03 | ONT | SFO | 11:32 | 12:29 |
Landed
|
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| Sep 26 | ONT | SFO | 16:09 | 17:12 |
Landed
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Air Canada Flight AC4121 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 AC4121 flight from Ontario to San Francisco?
The average flight time from Ontario to San Francisco is 1 hour. The flight distance is 585 km / 363 miles and the average flight speed is 579 km/h / 360 mph.
How many AC4121 flights are operated per week?
5 flights per week. The flight AC4121 is operated on Monday, Wednesday, Thursday, Saturday and Sunday.
What is the On-Time Performance (OTP) of Air Canada Flight AC4121 Ontario to San Francisco?
The Airportia On-Time Performance Rating for Air Canada Flight AC4121 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight AC4121 arriving at?
Flight AC4121 arrives at San Francisco International Airport (SFO) Terminal 3.
When was the latest AC4121 flight?
The latest flight took off on Tuesday, October 20th, 2026 with the flight status being Landed on 17:39.
How else can the flight AC4121 be referenced as?
This Air Canada flight can also be referenced as ACA4121, AC 4121, ACA 4121.
How often is flight AC4121 delayed?
On average, 40% of all AC4121 flights are delayed. The average delay is 28 minutes.
Can I get compensation for my delayed or cancelled AC4121 flight or baggage issues?
If your AC4121 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 AC4121 Flight Tracker above for more details.
Other flights departing from Ontario ONT: OO5483, WN3281, WN3277, WN235
Other flights arriving at San Francisco SFO: UA581, OO5503, OO5483, OO6006
All flights connecting Ontario ONT to San Francisco SFO.
