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Cheap flights from San Francisco to Ontario from C$ 182

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
30 Mar — 6 Apr1
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 25 March 2025.

Round-trip from

C$ 340

One-way from

C$ 182

Popular in

December

Cheapest in

February

Average price

C$ 580

Good round-trip deal

C$ 422 or less

Good one-way deal

C$ 233 or less
Flair Airlines
  • Flair Airlines
  • 5/5-11/5
  • 2 total stops
  • 34h 00m total
  • San Francisco to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 13/4
  • 1 total stop
  • 8h 00m total
  • San Francisco to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from San Francisco to Ontario.
Search Deals
Price to beat on a one-way flight from San Francisco to Ontario.
Search Deals

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 25 March 2025.

Mon 5/510:15 a.m.SFO - YKF
1 stop17h 55mFlair Airlines
Sun 11/58:25 p.m.YKF - SFO
1 stop16h 05mFlair Airlines
Deal found 24/3C$ 340
Tue 22/49:45 p.m.SFO - YYZ
1 stop29h 10mMultiple Airlines
Wed 30/412:00 p.m.YYZ - SFO
2 stops14h 59mMultiple Airlines
Deal found 24/3C$ 347
Wed 14/510:15 a.m.SFO - YKF
1 stop30h 10mMultiple Airlines
Mon 19/56:00 a.m.YKF - SFO
1 stop9h 05mMultiple Airlines
Deal found 24/3C$ 357
Thu 15/56:05 p.m.SFO - YYZ
1 stop9h 47mWestJet
Mon 19/56:30 a.m.YYZ - SFO
1 stop8h 35mWestJet
Deal found 24/3C$ 362
Sun 4/510:15 a.m.SFO - YYZ
1 stop18h 00mFlair Airlines
Tue 13/57:40 a.m.YYZ - SFO
1 stop28h 50mFlair Airlines
Deal found 23/3C$ 378
Thu 8/52:45 p.m.SFO - YXU
2 stops11h 29mMultiple Airlines
Thu 15/53:35 p.m.YXU - SFO
1 stop9h 14mMultiple Airlines
Deal found 24/3C$ 400
Wed 14/512:50 p.m.SFO - YHM
1 stop8h 51mWestJet
Sun 25/56:00 a.m.YHM - SFO
1 stop9h 05mWestJet
Deal found 24/3C$ 405
Wed 14/510:15 a.m.SFO - YTZ
2 stops27h 12mMultiple Airlines
Mon 19/57:00 a.m.YTZ - SFO
2 stops29h 30mMultiple Airlines
Deal found 24/3C$ 405
Fri 2/512:50 p.m.SFO - YUL
1 stop8h 53mMultiple Airlines
Sun 11/56:45 a.m.YUL - SFO
1 stop8h 45mMultiple Airlines
Deal found 24/3C$ 405
Fri 11/41:40 p.m.SFO - YUL
1 stop7h 55mPorter Airlines
Mon 21/46:45 a.m.YUL - SFO
1 stop8h 54mPorter Airlines
Deal found 24/3C$ 410
Thu 1/512:50 p.m.SFO - YKF
1 stop8h 56mWestJet
Mon 5/56:00 a.m.YKF - SFO
1 stop9h 05mWestJet
Deal found 25/3C$ 415
Thu 15/512:50 p.m.SFO - YOW
1 stop8h 51mWestJet
Thu 22/53:45 p.m.YOW - SFO
1 stop8h 40mWestJet
Deal found 24/3C$ 415

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 25 March 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 - YKF

SFOYKF

San Francisco

Mon 5/5

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

1 stop17h 55m

Toronto Region of Waterloo Intl

Sun 11/5

8:25 p.m.-9:30 a.m.

1 stop16h 05m

C$ 340

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Tue 22/4

9:45 p.m.-5:55 a.m.

1 stop29h 10m

Toronto Pearson Intl

Wed 30/4

12:00 p.m.-11:59 p.m.

2 stops14h 59m

C$ 347

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Wed 14/5

10:15 a.m.-7:25 p.m.

1 stop30h 10m

Toronto Region of Waterloo Intl

Mon 19/5

6:00 a.m.-12:05 p.m.

1 stop9h 05m

C$ 357

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Tue 6/5

12:50 p.m.-12:24 a.m.

1 stop8h 34m

Toronto Pearson Intl

Tue 13/5

6:30 a.m.-12:05 p.m.

1 stop8h 35m

C$ 374

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Sun 4/5

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

1 stop18h 00m

Toronto Pearson Intl

Tue 13/5

7:40 a.m.-9:30 a.m.

1 stop28h 50m

C$ 378

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 8/5

2:45 p.m.-5:14 a.m.

2 stops11h 29m

London

Thu 15/5

3:35 p.m.-9:49 p.m.

1 stop9h 14m

C$ 400

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Wed 14/5

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

1 stop8h 51m

Hamilton

Sun 25/5

6:00 a.m.-12:05 p.m.

1 stop9h 05m

C$ 405

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Wed 14/5

10:15 a.m.-4:27 p.m.

2 stops27h 12m

Toronto Island

Mon 19/5

7:00 a.m.-9:30 a.m.

2 stops29h 30m

C$ 405

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

Fri 2/5

12:50 p.m.-12:43 a.m.

1 stop8h 53m

Montreal Pierre Elliott Trudeau Intl

Sun 11/5

6:45 a.m.-12:30 p.m.

1 stop8h 45m

C$ 405

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

Fri 11/4

1:40 p.m.-12:35 a.m.

1 stop7h 55m

Montreal Pierre Elliott Trudeau Intl

Mon 21/4

6:45 a.m.-12:39 p.m.

1 stop8h 54m

C$ 410

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

Showing 1-10 of 60 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 25 March 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 25 March 2025.

The most flights from SFO to CAON are scheduled on a Tuesday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 25 March 2025.
Read through reviews of airlines operating flights from San Francisco to Ontario, such as Alaska Airlines, Delta and Porter Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,782 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Porter Airlines
7.9
Good
275 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Air Transat
7.8
Good
381 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Copa Airlines
7.6
Good
1,393 reviews
Alaska Airlines
8.0
Very good
9,782 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

7.9

Entertainment

7.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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$ 182 on Porter Airlines. Other airlines that offer cheap prices include WestJet from C$ 186 and Flair Airlines from C$ 206 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: Porter Airlines (75%), Air Transat (75%), United Airlines (73%).

  • 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$ 382, our data indicates the cheapest price to be C$ 176. The most popular route (San Francisco - Toronto Pearson Intl), is priced around C$ 347.

  • 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 297AverageC$ 687FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 308AverageC$ 577FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 315AverageC$ 835FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 327AverageC$ 1,054FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 332AverageC$ 550FlexibilityNo cancel feeOn-time60%
Search WestJet 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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