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Cheap flights from Ontario to San Francisco from $160

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco departing on 11/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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WestJet Logo
6:00 am - 12:10 pmYOW-SFO
9h 10m1 stop
WestJet Logo
1:00 pm - 12:40 amSFO-YOW
8h 40m1 stop
$247WestJet
Find Deal
Tue, Feb 17 - Fri, Feb 20
WestJet Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
WestJet Logo
12:50 pm - 12:40 amSFO-YHM
8h 50m1 stop
$252WestJet
Find Deal
Tue, Oct 21 - Thu, Oct 23
WestJet Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
WestJet Logo
12:50 pm - 12:40 amSFO-YHM
8h 50m1 stop
$254WestJet
Find Deal
Sat, Oct 18 - Thu, Oct 23
WestJet Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
WestJet Logo
12:50 pm - 12:40 amSFO-YHM
8h 50m1 stop
$257WestJet
Find Deal
Tue, Oct 21 - Fri, Oct 24
Multiple Airlines Logo
6:00 am - 12:12 pmYOW-SFO
9h 12m1 stop
Multiple Airlines Logo
10:15 am - 8:05 pmSFO-YOW
30h 50m1 stop
$259Multiple Airlines
Find Deal
Tue, Nov 25 - Sat, Dec 6
Air Canada Logo
7:45 am - 3:35 pmYOW-SFO
10h 50m1 stop
Air Canada Logo
11:20 am - 12:18 amSFO-YOW
9h 58m1 stop
$261Air Canada
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Wed, Nov 12 - Wed, Nov 19
Multiple Airlines Logo
10:40 am - 8:28 pmYYZ-SFO
12h 48m1 stop
Multiple Airlines Logo
10:15 am - 1:40 pmSFO-YYZ
24h 25m1 stop
$261Multiple Airlines
Find Deal
Fri, Oct 24 - Sun, Nov 2
Air Transat Logo
9:45 am - 12:40 pmYYZ-SFO
5h 55mnonstop
Air Transat Logo
1:40 pm - 9:37 pmSFO-YYZ
4h 57mnonstop
$277Air Transat
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Wed, Dec 17 - Wed, Feb 25
Air Canada Logo
5:00 am - 3:35 pmYOW-SFO
13h 35m2 stops
Air Canada Logo
6:00 pm - 6:43 amSFO-YOW
9h 43m1 stop
$282Air Canada
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Tue, Nov 25 - Fri, Dec 5
Flair Airlines Logo
9:00 pm - 9:30 amYYZ-SFO
15h 30m1 stop
Flair Airlines Logo
10:15 am - 7:15 amSFO-YYZ
18h 00m1 stop
$286Flair Airlines
Find Deal
Fri, Oct 17 - Sat, Oct 25

United Airlines flights from Region of Ontario to San Francisco

Our best United Airlines deals on Region of Ontario to San Francisco flight tickets
United Airlines
Feb 13
YOW2:15 pmOttawa
9h 50m
1 stop
SFO9:05 pmSan Francisco
Feb 22
SFO11:55 pmSan Francisco
10h 39m
1 stop
YOW1:34 pmOttawa
$340
Find similar
United Airlines
Oct 23
YUL6:15 amMontreal Pierre Elliott Trudeau Intl
10h 20m
1 stop
SFO1:35 pmSan Francisco
Oct 29
SFO9:20 pmSan Francisco
14h 56m
1 stop
YUL3:16 pmMontreal Pierre Elliott Trudeau Intl
$374
Find similar
United Airlines
Oct 21
YUL6:30 pmMontreal Pierre Elliott Trudeau Intl
6h 10m
SFO9:40 pmSan Francisco
Nov 1
SFO8:25 amSan Francisco
8h 23m
1 stop
YUL7:48 pmMontreal Pierre Elliott Trudeau Intl
$391
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Air Canada flights from Region of Ontario to San Francisco

Our best Air Canada deals on Region of Ontario to San Francisco flight tickets
Air Canada
Nov 12
YOW7:45 amOttawa
10h 50m
1 stop
SFO3:35 pmSan Francisco
Nov 19
SFO11:20 amSan Francisco
9h 58m
1 stop
YOW12:18 amOttawa
$261
Find similar
Air Canada
Nov 25
YOW5:00 amOttawa
13h 35m
2 stops
SFO3:35 pmSan Francisco
Dec 5
SFO6:00 pmSan Francisco
9h 43m
1 stop
YOW6:43 amOttawa
$282
Find similar
Air Canada
Feb 12
YOW2:50 pmOttawa
9h 32m
1 stop
SFO9:22 pmSan Francisco
Feb 18
SFO2:30 pmSan Francisco
8h 08m
1 stop
YOW1:38 amOttawa
$311
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 1, 2025.
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

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 2/17

6:00 am-12:10 pm

1 stop9h 10m

San Francisco

Fri 2/20

1:00 pm-12:40 am

1 stop8h 40m

$247

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Tue 10/21

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Thu 10/23

12:50 pm-12:40 am

1 stop8h 50m

$252

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Sat 10/18

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Thu 10/23

12:50 pm-12:40 am

1 stop8h 50m

$254

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Tue 10/21

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Fri 10/24

12:50 pm-12:40 am

1 stop8h 50m

$257

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 11/25

6:00 am-12:12 pm

1 stop9h 12m

San Francisco

Sat 12/6

10:15 am-8:05 pm

1 stop30h 50m

$259

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 11/12

7:45 am-3:35 pm

1 stop10h 50m

San Francisco

Wed 11/19

11:20 am-12:18 am

1 stop9h 58m

$261

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 10/24

10:40 am-8:28 pm

1 stop12h 48m

San Francisco

Sun 11/2

10:15 am-1:40 pm

1 stop24h 25m

$261

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Wed 12/17

9:45 am-12:40 pm

Nonstop5h 55m

San Francisco

Wed 2/25

1:40 pm-9:37 pm

Nonstop4h 57m

$277

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 11/25

5:00 am-3:35 pm

2 stops13h 35m

San Francisco

Fri 12/5

6:00 pm-6:43 am

1 stop9h 43m

$282

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 10/17

9:00 pm-9:30 am

1 stop15h 30m

San Francisco

Sat 10/25

10:15 am-7:15 am

1 stop18h 00m

$286

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Region of Ontario to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $333.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Region of Ontario to San Francisco is on a Friday when prices can be found for as low as $434. The most expensive day to fly to San Francisco is Tuesday, with ticket prices averaging around $757.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Region of Ontario to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $451. Flights in the evening are often more expensive with an average ticket price of $930.

What is the cheapest Ontario to San Francisco flight route?

Fly from Toronto Pearson Intl to San Francisco for the best Ontario - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $378 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Region of Ontario for as low as $336 on momondo.

What cabin class options are available on Ontario to San Francisco flights?

There are 4 cabin classes available to choose from on Ontario to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to San Francisco flights?

You could potentially save up to 13% on your flight if you consider stops on a Region of Ontario to San Francisco flight.

Cheap Region of Ontario to San Francisco flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to San Francisco

Best Price Found

$197

Fastest flight time

5h 28m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Region of Ontario in the past 72 hours is $197. The best round-trip flight deal from Region of Ontario to San Francisco found on momondo in the last 72 hours is $417.
The fastest flight from Region of Ontario to San Francisco takes 5h 28m
Direct flights go from Region of Ontario to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
Search flight deals

  • When did momondo last update prices for flights from Ontario to San Francisco Airport?

    Prices for flights from Ontario to San Francisco Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to San Francisco Airport?

  • How old do you have to be to fly from Ontario to San Francisco Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The travel and health documents required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to San Francisco?

Best airlines flying from Region of Ontario to San Francisco

Compare and see reviews for airlines that fly from Region of Ontario to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $172Free CancellationRating
7.2
3,111 reviews
Search WestJet flights
Air CanadaPriceFrom $222Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $241Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
Porter AirlinesPriceFrom $257Free CancellationRating
7.9
372 reviews
Search Porter Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $308Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Air TransatPriceFrom $338Free CancellationRating
7.7
450 reviews
Search Air Transat flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Calistoga
Bodega Bay
Hayward
Roseville
Big Sur
Santa Clara
Daly City
Fremont
Berkeley
Half Moon Bay
Walnut Creek
Vallejo
Salinas
Redwood City
South San Francisco
Fairfield

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Francisco?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to San Francisco. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to San Francisco with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Francisco from Ontario with this policy.

How can momondo help me find flights from Ontario to San Francisco?

momondo provides multiple filters to help you find the best flight to San Francisco from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to San Francisco right now. Can momondo alert me if prices change?

Price alerts on flights to San Francisco from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Francisco trip

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