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Cheap flights from San Francisco to Ontario from C$ 147

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
3 Aug — 10 Aug1
1 adult

Cheap flight deals from San Francisco to Ontario

Keep the following information in mind while searching for San Francisco to Ontario flight deals. Data was last updated 29 July 2025.

Round-trip from

C$ 322

One-way from

C$ 147

Popular in

December

Cheapest in

April

Average price

C$ 650

Good round-trip deal

C$ 308 or less

Good one-way deal

C$ 245 or less
18/9-22/9
  • 18/9-22/9
  • 2 total stops
  • 31h 03m total
  • San Francisco to Ontario
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30/9
  • 30/9
  • 1 total stop
  • 10h 44m total
  • San Francisco to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 113 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from San Francisco to Ontario.
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Price to beat on a one-way flight from San Francisco to Ontario.
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Find flight deals from San Francisco to Ontario

Cheapest flights from San Francisco to Ontario
Explore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.

Thu 18/910:15 a.m.SFO - YYZ
1 stop16h 58mMultiple Airlines
Mon 22/910:25 p.m.YYZ - SFO
1 stop14h 05mMultiple Airlines
Deal found 27/7C$ 322
Thu 16/1010:15 a.m.SFO - YYZ
1 stop18h 00mFlair Airlines
Tue 21/109:00 p.m.YYZ - SFO
1 stop15h 30mFlair Airlines
Deal found 27/7C$ 332
Mon 8/910:15 a.m.SFO - YXU
2 stops15h 57mMultiple Airlines
Tue 16/96:00 a.m.YXU - SFO
1 stop8h 54mMultiple Airlines
Deal found 27/7C$ 379
Thu 4/910:15 a.m.SFO - YHM
1 stop10h 44mMultiple Airlines
Wed 10/95:45 p.m.YHM - SFO
1 stop18h 45mMultiple Airlines
Deal found 28/7C$ 383
Mon 8/912:50 p.m.SFO - YYZ
2 stops14h 01mWestJet
Fri 19/96:45 a.m.YYZ - SFO
2 stops13h 29mWestJet
Deal found 27/7C$ 387
Tue 9/910:15 a.m.SFO - YOW
2 stops17h 30mMultiple Airlines
Tue 16/912:20 p.m.YOW - SFO
2 stops12h 04mMultiple Airlines
Deal found 27/7C$ 388
Tue 19/812:50 p.m.SFO - YKF
1 stop8h 56mWestJet
Thu 28/86:00 a.m.YKF - SFO
1 stop8h 56mWestJet
Deal found 29/7C$ 413
Thu 18/910:15 a.m.SFO - YKF
2 stops16h 15mMultiple Airlines
Mon 22/96:00 a.m.YKF - SFO
1 stop14h 14mMultiple Airlines
Deal found 27/7C$ 416
Mon 8/96:05 p.m.SFO - YXU
1 stop8h 07mWestJet
Tue 16/96:00 a.m.YXU - SFO
1 stop8h 54mWestJet
Deal found 27/7C$ 416
Tue 19/812:50 p.m.SFO - YOW
1 stop8h 51mWestJet
Fri 22/812:20 p.m.YOW - SFO
2 stops12h 05mWestJet
Deal found 28/7C$ 425
Tue 30/912:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Tue 7/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Deal found 27/7C$ 431
Thu 14/810:15 a.m.SFO - YKF
1 stop17h 55mFlair Airlines
Sun 17/88:25 p.m.YKF - SFO
1 stop16h 05mFlair Airlines
Deal found 27/7C$ 455

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Ontario 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 629,999 searches. Data last updated 29 July 2025.
Use the filters below to find and compare flights from San Francisco to Ontario that are best for you.

Fly from

San Francisco

Fly to

Ontario

Route

Depart

Return

Price

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Thu 18/9

10:15 a.m.-6:13 a.m.

1 stop16h 58m

Toronto Pearson Intl

Mon 22/9

10:25 p.m.-9:30 a.m.

1 stop14h 05m

C$ 322

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Thu 16/10

10:15 a.m.-7:15 a.m.

1 stop18h 00m

Toronto Pearson Intl

Tue 21/10

9:00 p.m.-9:30 a.m.

1 stop15h 30m

C$ 332

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/9

10:15 a.m.-5:12 a.m.

2 stops15h 57m

London

Tue 16/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

C$ 379

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Thu 4/9

10:15 a.m.-11:59 p.m.

1 stop10h 44m

Hamilton

Wed 10/9

5:45 p.m.-9:30 a.m.

1 stop18h 45m

C$ 383

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Mon 8/9

12:50 p.m.-5:51 a.m.

2 stops14h 01m

Toronto Pearson Intl

Fri 19/9

6:45 a.m.-5:14 p.m.

2 stops13h 29m

C$ 387

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Tue 9/9

10:15 a.m.-6:45 a.m.

2 stops17h 30m

Ottawa

Tue 16/9

12:20 p.m.-9:24 p.m.

2 stops12h 04m

C$ 388

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Tue 19/8

12:50 p.m.-12:46 a.m.

1 stop8h 56m

Toronto Region of Waterloo Intl

Thu 28/8

6:00 a.m.-11:56 a.m.

1 stop8h 56m

C$ 413

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 8/9

6:05 p.m.-5:12 a.m.

1 stop8h 07m

London

Tue 16/9

6:00 a.m.-11:54 a.m.

1 stop8h 54m

C$ 416

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Thu 18/9

10:15 a.m.-5:30 a.m.

2 stops16h 15m

Toronto Region of Waterloo Intl

Mon 22/9

6:00 a.m.-5:14 p.m.

1 stop14h 14m

C$ 416

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Tue 19/8

12:50 p.m.-12:41 a.m.

1 stop8h 51m

Ottawa

Fri 22/8

12:20 p.m.-9:25 p.m.

2 stops12h 05m

C$ 425

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 50 results
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Best time to book a flight from San Francisco to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from San Francisco 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.

Cheapflights Insights

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

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of C$ 167). Flying from San Francisco to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 SFO to ON?

Find hourly flight availability from San Francisco to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 July 2025.

When flying from San Francisco to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from San Francisco to Region of Ontario

Explore weekly flight availability from San Francisco to Ontario. 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 29 July 2025.

The most flights from SFO to CAON are scheduled on a Monday (22 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (16 on average).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 29 July 2025.
Get a feel of what it's like to fly with Porter Airlines,Delta, andAir Transat from San Francisco to Ontario by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Porter Airlines
8.0
Very good
317 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Delta
8.0
Very good
7,977 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
Air Transat
7.7
Good
424 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
United Airlines
7.4
Good
8,899 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience
American Airlines
7.2
Good
10,000 reviews
Porter Airlines
8.0
Very good
317 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.0

Comfort

8.0

Crew

8.7

Food

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Jul 2025

LIS - YYZ

Everything was on time and easy. Crew were nice on flights and helpful. International flight, so long and typically uncomfortable but not more than most. Food and drink service were below average but you get what you pay for. Overall, good experience

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Ontario. 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 from for flights from San Francisco to Ontario?

    San Francisco (SFO) is the airport you will fly out of if you book a flight from San Francisco to Ontario. It is only a 19.0 km journey to San Francisco (SFO) from San Francisco’s city centre.

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

    One-way options have recently been found by users for as low as C$ 195 on WestJet. Other airlines that offer cheap prices include Flair Airlines from C$ 206 and United Airlines from C$ 221 one-way.

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

    Most travellers choose San Francisco - Toronto Pearson Intl, San Francisco - Montreal Pierre Elliott Trudeau Intl or San Francisco - Toronto Island when deciding on the best route from San Francisco to Region of Ontario.

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

    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 San Francisco to Region of Ontario on time: Brussels Airlines (94%), Singapore Airlines (82%), Austrian Airlines (77%).

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

    Looking for the cheapest flight from San Francisco to Region of Ontario? While on average our users pay C$ 425, our data indicates the cheapest price to be C$ 192. The most popular route (San Francisco - Toronto Pearson Intl), is priced around C$ 317.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Ontario 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 San Francisco to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of C$ 167). Flying from San Francisco to Region of Ontario in July is currently the most expensive (average of C$ 258). 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

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Alternative routes for San Francisco to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from San Francisco to Ontario

Discover the top 5 airlines that operate flights from San Francisco to Ontario. 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 629,999 searches. Data last updated 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 259AverageC$ 702FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 297AverageC$ 553FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 313AverageC$ 987FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 318AverageC$ 448FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 397AverageC$ 549FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

When you search for this flight from San Francisco to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from San Francisco to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights offers price alerts on San Francisco to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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