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Cheap flights from Ontario to San Francisco from C$ 263

YYZ — SFO
24 Nov — 1 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to San Francisco

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to San Francisco

Fri 6/116:40 p.m. -
Nonstop5h 50m
Mon 16/1112:00 p.m. -
Nonstop4h 55m
Deal found 21/10C$ 412
Fri 20/114:10 p.m. -
1 stop18h 38m
Tue 24/118:25 a.m. -
1 stop10h 10m
Deal found 23/10C$ 413
Fri 4/128:00 a.m. -
1 stop8h 51m
Wed 9/1212:00 p.m. -
Nonstop4h 55m
Deal found 22/10C$ 415
Thu 12/115:15 p.m. -
2 stops18h 37m
Tue 17/115:42 p.m. -
1 stop19h 23m
Deal found 21/10C$ 417
Thu 19/112:15 p.m. -
2 stops27h 19m
Wed 25/111:45 p.m. -
Nonstop4h 58m
Deal found 24/10C$ 419
Sat 7/119:50 a.m. -
Nonstop5h 54m
Mon 16/111:45 p.m. -
Nonstop4h 58m
Deal found 21/10C$ 420
Wed 11/119:50 a.m. -
Nonstop5h 54m
Sat 14/111:45 p.m. -
Nonstop4h 58m
Deal found 24/10C$ 422
Wed 18/117:00 a.m. -
1 stop8h 44m
Wed 9/121:45 p.m. -
1 stop7h 56m
Deal found 23/10C$ 423
Tue 1/126:15 a.m. -
1 stop10h 36m
Tue 8/128:25 a.m. -
Nonstop4h 49m
Deal found 22/10C$ 423
Thu 12/115:15 p.m. -
2 stops18h 37m
Wed 18/113:38 p.m. -
2 stops21h 27m
Deal found 21/10C$ 424
Wed 4/119:50 a.m. -
Nonstop5h 54m
Tue 10/111:45 p.m. -
Nonstop4h 58m
Deal found 21/10C$ 426
Wed 11/1112:50 p.m. -
Nonstop5h 50m
Thu 12/112:00 p.m. -
Nonstop4h 49m
Deal found 22/10C$ 427

Find flight deals from Ontario to San Francisco

Round-trip from

C$ 408

One-way from

C$ 263

Popular in

July

Cheapest in

January

Average price

C$ 571

Good round-trip deal

C$ 506 or less

Good one-way deal

C$ 342 or less
Air Canada
  • Air Canada
  • 14/4-20/4
  • 2 total stops
  • 15h 46m total
  • Ontario to San Francisco
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Alaska Airlines
  • Alaska Airlines
  • 23/11-31/12
  • 2 total stops
  • 19h 13m total
  • Ontario to San Francisco
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Highest demand for flights based on searches. 9% potential increase in price (C$ 92 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Ontario to San Francisco.
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Price to beat on a one-way flight from Ontario to San Francisco.
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

YXU London - SFO San Francisco

YXUSFO

London

Sat 5/12

3:20 p.m.-9:30 p.m.

1 stop9h 10m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 270

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Tue 19/1

10:35 a.m.-4:26 p.m.

1 stop8h 51m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 274

OttawaSan Francisco

YOW Ottawa - SFO San Francisco

YOWSFO

Ottawa

Mon 7/12

7:00 a.m.-12:47 p.m.

1 stop8h 47m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 284

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Thu 10/12

3:20 p.m.-9:50 p.m.

1 stop9h 30m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Wed 2/12

6:30 p.m.-1:15 p.m.

2 stops21h 45m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Wed 11/11

12:05 p.m.-6:56 p.m.

1 stop9h 51m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Mon 7/12

6:30 p.m.-11:36 a.m.

2 stops20h 06m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Sat 5/12

12:05 p.m.-6:54 p.m.

1 stop9h 49m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YTZ Toronto Island - SFO San Francisco

YTZSFO

Toronto Island

Thu 12/11

3:20 p.m.-1:29 a.m.

1 stop13h 09m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 286

TorontoSan Francisco

YYZ Toronto Pearson Intl - SFO San Francisco

YYZSFO

Toronto Pearson Intl

Tue 10/11

12:15 p.m.-8:58 p.m.

1 stop11h 43m

San Francisco

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 287

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/10

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Francisco

What is the cheapest month to book a flight from Region of Ontario to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco (average of C$ 514). Flying from Region of Ontario to San Francisco in August is currently the most expensive (average of C$ 685). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to SFO?

One of the essential ways to save on airfare from Region of Ontario to San Francisco is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 54% on airfare.

How much does it cost to fly round-trip from Region of Ontario to San Francisco?

Airfare is below average for this route at the moment.
Region of Ontario to San Francisco flights typically cost between C$ 461 and C$ 709 in November.
The cheapest round-trip price found within the last 5 days was C$ 412 on Air Canada (6 Nov-16 Nov).

How far ahead should I book a flight from Region of Ontario to San Francisco?

The best time to book flights from Region of Ontario to San Francisco is 54 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest day to fly from Region of Ontario to San Francisco?

Travelers seeking maximum savings on their Region of Ontario to San Francisco flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

  • What airport do you fly into for flights to San Francisco from Ontario?

    Located just 17.7 km from the city centre, San Francisco (SFO) is the airport most travelers will use when flying to San Francisco from Ontario.

  • How long is the flight from Region of Ontario to San Francisco?

    Departing from Region of Ontario to San Francisco will take you 7h 55m. Region of Ontario and San Francisco are separated by a distance of 3524 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Region of Ontario to San Francisco one-way?

    One-way options have recently been found by users for as low as C$ 205 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 220 and Air Transat from C$ 226 one-way.

  • What are the most popular routes from Region of Ontario to San Francisco?

    While some choose either Montreal Pierre Elliott Trudeau Intl - San Francisco or Toronto Island - San Francisco, Toronto Pearson Intl - San Francisco is the most popular route from Region of Ontario to San Francisco.

  • What are the most reliable airlines from Region of Ontario to San Francisco?

    Before booking your flight to San Francisco from Region of Ontario, check out the most reliable airlines to get you to your destination on time: American Airlines (71%), Porter Airlines (71%), Air Transat( 71%).

  • What are the cheapest flights from Region of Ontario to San Francisco?

    Looking for the cheapest flight from Region of Ontario to San Francisco? While on average our users pay C$ 1,279, our data indicates the cheapest price to be C$ 273. The most popular route (Toronto Pearson Intl - San Francisco), is priced around C$ 318.

  • Can I find deals for flights from Ontario to San Francisco that include hotel bookings?

    Yes. In addition to deals on Ontario to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco.

  • Can I find deals for business class flights from Ontario to San Francisco?

    Yes. Cheapflights offers flight deals from Ontario to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco (average of C$ 514). Flying from Region of Ontario to San Francisco in August is currently the most expensive (average of C$ 685). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Clara
San Bruno
Burlingame
Roseville
Livermore
South San Francisco
Novato
Manteca
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Ontario to San Francisco

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Top 7 airlines flying from Ontario to San Francisco

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 292AverageC$ 722FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
WestJetCheapestC$ 305AverageC$ 483FlexibilityNo cancel feeOn-time60%
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Porter AirlinesCheapestC$ 326AverageC$ 575FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
American AirlinesCheapestC$ 354AverageC$ 658FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air TransatCheapestC$ 357AverageC$ 587FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 420AverageC$ 736FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 473AverageC$ 804FlexibilityNo cancel feeOn-time69%
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Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to San Francisco?

Cheapflights helps you search for flights from Ontario to San Francisco via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Francisco?

Cheapflights helps you find that perfect flight to San Francisco from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to San Francisco with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to San Francisco, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ontario to San Francisco become cheaper?

Yes! Start tracking prices for Ontario to San Francisco flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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