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$149+ Cheap flights from Ontario to San Francisco (SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SFO
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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Cheap flight deals from Ontario to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2024.

Round-trip from

$231
(Trip.com)

One-way from

$149
(oojo)
From Ontario to San Francisco
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One-way flight from Ontario to San Francisco
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Find flight deals from Ontario to San Francisco

Cheapest flights from Ontario to San Francisco
Explore the most affordable flight options available from Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2024.

This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/255:30 amYOW - SFO
2 stops15h 20mUnited Airlines
Mon 1/611:35 pmSFO - YOW
1 stop14h 31mUnited Airlines
Deal found 12/17$291
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:30 amYYZ - SFO
2 stops13h 47mMultiple Airlines
Mon 1/133:05 pmSFO - YYZ
1 stop12h 41mMultiple Airlines
Deal found 12/16$363
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/277:35 amYYZ - SFO
1 stop17h 32mAmerican Airlines
Tue 1/77:11 amSFO - YYZ
1 stop12h 23mAmerican Airlines
Deal found 12/17$373
This Justfly.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/236:45 amYUL - SFO
1 stop8h 54mPorter Airlines
Wed 1/11:40 pmSFO - YUL
1 stop7h 48mPorter Airlines
Deal found 12/16$457
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/248:05 amYUL - SFO
1 stop17h 58mUnited Airlines
Tue 12/315:00 amSFO - YUL
1 stop9h 08mUnited Airlines
Deal found 12/17$477
This oojo deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/259:45 amYYZ - SFO
Nonstop5h 54mPorter Airlines
Wed 1/81:35 pmSFO - YYZ
Nonstop5h 02mPorter Airlines
Deal found 12/17$484
This United deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/318:25 amYUL - SFO
1 stop18h 30mMultiple Airlines
Sat 1/118:30 amSFO - YUL
Nonstop5h 28mMultiple Airlines
Deal found 12/16$532
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/246:00 pmYYZ - SFO
Nonstop5h 57mUnited Airlines
Wed 1/86:15 amSFO - YYZ
1 stop9h 26mUnited Airlines
Deal found 12/17$548
This Air Canada deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/235:20 pmYYZ - SFO
Nonstop5h 47mAir Canada
Thu 1/98:30 amSFO - YYZ
1 stop10h 20mAir Canada
Deal found 12/16$555
This Mytrip deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/201:10 pmYTZ - SFO
3 stops36h 41mMultiple Airlines
Sat 1/117:10 pmSFO - YTZ
2 stops20h 43mMultiple Airlines
Deal found 12/17$607
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2812:55 pmYUL - SFO
1 stop12h 12mAmerican Airlines
Tue 1/145:55 amSFO - YUL
2 stops13h 50mAmerican Airlines
Deal found 12/16$612
This Air Canada deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/243:25 pmYTZ - SFO
1 stop9h 26mAir Canada
Thu 1/98:30 amSFO - YTZ
1 stop10h 20mAir Canada
Deal found 12/16$630

Find flights from Ontario to San Francisco within your budget

Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Wed 4/2

6:45 am-12:24 pm

1 stop8h 39m

San Francisco

Wed 4/23

1:35 pm-12:30 am

1 stop7h 55m

$261

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 1/21

5:35 pm-7:16 am

1 stop16h 41m

San Francisco

Tue 1/28

10:54 am-12:30 am

2 stops10h 36m

$262

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 1/17

5:10 am-10:52 am

1 stop8h 42m

San Francisco

Fri 1/24

10:45 pm-9:15 am

1 stop7h 30m

$269

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 4/23

5:45 am-10:52 am

1 stop8h 07m

San Francisco

Tue 5/20

7:05 pm-2:58 pm

2 stops16h 53m

$277

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 1/27

10:30 am-9:05 pm

2 stops13h 35m

San Francisco

Fri 1/31

8:19 pm-2:29 pm

2 stops15h 10m

$285

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sat 5/31

7:00 am-9:25 pm

1 stop17h 25m

San Francisco

Sun 6/8

2:45 pm-6:58 am

1 stop13h 13m

$287

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 1/30

6:15 am-1:05 pm

1 stop9h 50m

San Francisco

Sun 2/2

1:55 pm-5:29 am

2 stops12h 34m

$288

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Sun 2/23

6:20 am-12:24 pm

1 stop9h 04m

San Francisco

Thu 2/27

1:35 pm-12:40 am

1 stop8h 05m

$290

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Tue 4/1

9:35 am-12:24 pm

Nonstop5h 49m

San Francisco

Tue 4/8

7:02 pm-6:43 am

1 stop8h 41m

$297

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Fri 1/17

6:20 am-12:24 pm

1 stop9h 04m

San Francisco

Thu 1/23

7:10 pm-12:40 am

3 stops26h 30m

$307

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 results
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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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to San Francisco

Get recent, data-driven insights about flights from Ontario to San Francisco including ideal travel times, pricing trends, and more.

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 $276). Flying from Region of Ontario to San Francisco in June is currently the most expensive (average of $381). 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?

Find hourly flight availability from Ontario to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Region of Ontario to San Francisco as you normally would.

Weekly flight availability from Region of Ontario to San Francisco

Explore weekly flight availability from Ontario to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2024.

The most flights from CAON to SFO are scheduled on a Monday (20 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (11 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated December 18, 2024.
See what other customers who have flown with Air Canada, United Airlines and Porter Airlines from Ontario to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

Alaska Airlines
8.0
Very good
9,554 reviews
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

Delta
8.0
Very good
8,604 reviews
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

Porter Airlines
7.9
Good
283 reviews
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

SWISS
7.6
Good
1,606 reviews
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

United Airlines
7.4
Good
9,055 reviews
Alaska Airlines
8.0
Very good
9,554 reviews

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.2

Boarding

8.2

Crew

8.5

Reviews

1 / 10

Things were good, crew was good. It was just the flight itself was very rough. Lots of turbulence, probably one of the shakiest flights I've been on. Kids throwing up, kids crying everywhere because of it.

Related info for your journey

Find useful and relevant information for your journey from Ontario to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    If you book a flight to San Francisco from Ontario, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

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

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at $149. United Airlines flights start at $161 while deals on WestJet start at $171 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?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Region of Ontario to San Francisco on time: Austrian Airlines (73%), Air Canada (72%), Air New Zealand (71%).

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

    Looking at all options, your cheapest flight can be booked for $163. While the most popular route (Toronto Pearson Intl - San Francisco) can be booked for $207 on average our data indicates $836 when flying from Region of Ontario to San Francisco.

  • 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 $276). Flying from Region of Ontario to San Francisco in June is currently the most expensive (average of $381). 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.

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Alternative routes for Ontario to San Francisco

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Top 8 airlines flying from Ontario to San Francisco

Discover the top 8 airlines that operate flights from Ontario to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Lynx AirCheapest$115Average$238FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$199Average$471FlexibilityNo cancel feeOn-time71%
Porter AirlinesCheapest$229Average$440FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$235Average$512FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$237Average$562FlexibilityNo cancel feeOn-time69%
WestJetCheapest$255Average$493FlexibilityNo cancel feeOn-time60%
Air TransatCheapest$260Average$373FlexibilityNo cancel feeOn-time50%
DeltaCheapest$435Average$526FlexibilityNo cancel feeOn-timeN/A
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