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Cheap flights from San Francisco to Ontario from C$ 129

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
20 abr. — 27 abr.1
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 15 abril 2025.

Round-trip from

C$ 261

One-way from

C$ 129

Popular in

December

Cheapest in

February

Average price

C$ 521

Good round-trip deal

C$ 472 or less

Good one-way deal

C$ 238 or less
5/5-12/5
  • 5/5-12/5
  • 3 total stops
  • 46h 33m total
  • San Francisco to Ontario
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29/4
  • 29/4
  • 1 total stop
  • 24h 00m total
  • San Francisco to Ontario
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Highest demand for flights based on searches. 8% potential increase in price (C$ 80 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in April 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 15 abril 2025.

lun. 5/59:50 p.m.SFO - YYZ
1 stop16h 30mMultiple Airlines
lun. 12/510:00 a.m.YYZ - SFO
2 stops30h 03mMultiple Airlines
Deal found 14/4C$ 261
jue. 5/610:15 a.m.SFO - YKF
1 stop17h 55mFlair Airlines
sáb. 7/68:25 p.m.YKF - SFO
1 stop16h 05mFlair Airlines
Deal found 14/4C$ 317
mié. 7/510:15 a.m.SFO - YKF
1 stop30h 10mMultiple Airlines
vie. 9/59:25 a.m.YKF - SFO
2 stops29h 40mMultiple Airlines
Deal found 14/4C$ 341
mar. 3/612:50 p.m.SFO - YKF
1 stop8h 56mWestJet
mar. 17/66:00 a.m.YKF - SFO
1 stop9h 05mWestJet
Deal found 15/4C$ 345
mar. 17/62:45 p.m.SFO - YYZ
2 stops12h 27mWestJet
mié. 25/66:30 a.m.YYZ - SFO
1 stop8h 35mWestJet
Deal found 15/4C$ 366
mié. 7/510:15 a.m.SFO - YTZ
2 stops27h 12mMultiple Airlines
vie. 9/57:00 a.m.YTZ - SFO
2 stops29h 30mMultiple Airlines
Deal found 14/4C$ 367
jue. 1/51:30 p.m.SFO - YUL
1 stop8h 07mPorter Airlines
mié. 7/56:45 a.m.YUL - SFO
1 stop8h 45mPorter Airlines
Deal found 14/4C$ 367
dom. 1/66:05 p.m.SFO - YOW
1 stop9h 40mMultiple Airlines
sáb. 7/66:00 a.m.YOW - SFO
1 stop8h 35mMultiple Airlines
Deal found 15/4C$ 373
vie. 30/511:25 a.m.SFO - YUL
Nonstop5h 40mAir Canada
vie. 6/64:45 p.m.YUL - SFO
Nonstop6h 25mAir Canada
Deal found 15/4C$ 375
mié. 14/51:30 p.m.SFO - YOW
1 stop7h 51mPorter Airlines
dom. 18/57:00 a.m.YOW - SFO
1 stop8h 30mPorter Airlines
Deal found 15/4C$ 377
vie. 30/51:30 p.m.SFO - YUL
1 stop8h 07mMultiple Airlines
vie. 6/68:10 a.m.YUL - SFO
Nonstop6h 25mMultiple Airlines
Deal found 15/4C$ 380
mar. 10/66:05 p.m.SFO - YOW
1 stop9h 40mWestJet
dom. 15/66:00 a.m.YOW - SFO
1 stop9h 05mWestJet
Deal found 15/4C$ 381

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 15 abril 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

lun. 5/5

9:50 p.m.-5:20 p.m.

1 stop16h 30m

Toronto Pearson Intl

lun. 12/5

10:00 a.m.-1:03 p.m.

2 stops30h 03m

C$ 261

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

jue. 5/6

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

1 stop17h 55m

Toronto Region of Waterloo Intl

sáb. 7/6

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

1 stop16h 05m

C$ 317

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

mié. 7/5

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

1 stop30h 10m

Toronto Region of Waterloo Intl

vie. 9/5

9:25 a.m.-12:05 p.m.

2 stops29h 40m

C$ 341

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

mar. 3/6

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

1 stop8h 56m

Toronto Region of Waterloo Intl

mar. 17/6

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

1 stop9h 05m

C$ 345

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

mar. 17/6

2:45 p.m.-6:12 a.m.

2 stops12h 27m

Toronto Pearson Intl

mar. 24/6

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

1 stop8h 35m

C$ 366

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

jue. 1/5

1:30 p.m.-12:37 a.m.

1 stop8h 07m

Montreal Pierre Elliott Trudeau Intl

mié. 7/5

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

1 stop8h 45m

C$ 367

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

mié. 7/5

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

2 stops27h 12m

Toronto Island

vie. 9/5

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

2 stops29h 30m

C$ 367

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

dom. 1/6

6:05 p.m.-6:45 a.m.

1 stop9h 40m

Ottawa

sáb. 7/6

6:00 a.m.-11:35 a.m.

1 stop8h 35m

C$ 373

San FranciscoMontreal

SFO - YUL

SFOYUL

San Francisco

vie. 30/5

11:25 a.m.-8:05 p.m.

Nonstop5h 40m

Montreal Pierre Elliott Trudeau Intl

vie. 6/6

4:45 p.m.-8:10 p.m.

Nonstop6h 25m

C$ 375

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

mié. 14/5

1:30 p.m.-12:21 a.m.

1 stop7h 51m

Ottawa

dom. 18/5

7:00 a.m.-12:30 p.m.

1 stop8h 30m

C$ 377

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/4

Showing 1-10 of 57 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 15 abril 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 15 abril 2025.

The most flights from SFO to CAON are scheduled on a Tuesday (24 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 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 15 abril 2025.
Read through reviews of airlines operating flights from San Francisco to Ontario, such as Alaska Airlines, Porter Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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
8.0
Very good
281 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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
385 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews
Check prices

Entertainment

7.1

Overall

8.0

Comfort

7.9

Food

7.1

Boarding

8.2

Crew

8.5

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$ 172 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 179 and Air Canada from C$ 186 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: United Airlines (71%), Austrian Airlines (66%), Singapore Airlines (66%).

  • 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$ 401, our data indicates the cheapest price to be C$ 171. The most popular route (San Francisco - Toronto Pearson Intl), is priced around C$ 242.

  • 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 15 abril 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 299AverageC$ 560FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 300AverageC$ 769FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 317AverageC$ 969FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 322AverageC$ 532FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 387AverageC$ 663FlexibilityNo 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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