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Cheap flights from San Francisco to Ontario from C$ 201

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Ontario

Enter your travel dates to find the best prices.

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 13 March 2026.

Tue 7/46:34 p.m.
SFO
-
YYZ
2 stops22h 52m
Multiple Airlines
Mon 13/48:00 p.m.
YYZ
-
SFO
1 stop25h 45m
Multiple Airlines
Deal found 9/3C$ 373
Tue 7/46:34 p.m.
SFO
-
YYZ
2 stops22h 02m
Multiple Airlines
Tue 28/49:45 a.m.
YYZ
-
SFO
1 stop31h 07m
Multiple Airlines
Deal found 13/3C$ 390
Sat 18/47:40 p.m.
SFO
-
YYZ
1 stop7h 40m
Multiple Airlines
Tue 28/49:35 a.m.
YYZ
-
SFO
1 stop31h 17m
Multiple Airlines
Deal found 10/3C$ 393
Wed 22/47:40 p.m.
SFO
-
YYZ
2 stops20h 56m
Multiple Airlines
Wed 29/46:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Deal found 8/3C$ 403
Tue 14/42:47 p.m.
SFO
-
YYZ
2 stops12h 26m
Multiple Airlines
Sat 18/49:50 a.m.
YYZ
-
SFO
Nonstop5h 55m
Multiple Airlines
Deal found 9/3C$ 408
Mon 20/41:12 p.m.
SFO
-
YYZ
1 stop14h 31m
Multiple Airlines
Tue 28/49:45 a.m.
YYZ
-
SFO
1 stop12h 00m
Multiple Airlines
Deal found 9/3C$ 410
Wed 8/410:14 p.m.
SFO
-
YYZ
1 stop29h 29m
Multiple Airlines
Mon 13/48:00 p.m.
YYZ
-
SFO
1 stop25h 45m
Multiple Airlines
Deal found 9/3C$ 412
Mon 20/41:12 p.m.
SFO
-
YYZ
2 stops14h 01m
Multiple Airlines
Thu 30/46:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Deal found 9/3C$ 416
Mon 20/41:12 p.m.
SFO
-
YYZ
1 stop14h 08m
Multiple Airlines
Wed 6/56:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Deal found 9/3C$ 418
Wed 6/55:47 p.m.
SFO
-
YYZ
1 stop23h 22m
Multiple Airlines
Sun 10/56:15 a.m.
YYZ
-
SFO
1 stop8h 45m
Multiple Airlines
Deal found 8/3C$ 419
Mon 27/49:20 p.m.
SFO
-
YUL
2 stops30h 45m
Multiple Airlines
Mon 4/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Multiple Airlines
Deal found 12/3C$ 446
Mon 27/49:20 p.m.
SFO
-
YUL
2 stops30h 45m
Multiple Airlines
Sun 10/56:45 a.m.
YUL
-
SFO
1 stop8h 35m
Multiple Airlines
Deal found 12/3C$ 448

Find 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 13 March 2026.

Round-trip from

C$ 373

One-way from

C$ 201

Popular in

December

Cheapest in

January

Average price

C$ 597

Good round-trip deal

C$ 557 or less

Good one-way deal

C$ 250 or less
7/4-13/4
  • 7/4-13/4
  • 3 total stops
  • 48h 37m total
  • San Francisco to Ontario
Search Deals
WestJet
  • WestJet
  • 2/6
  • 2 total stops
  • 13h 10m total
  • San Francisco to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 82 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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

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 13 March 2026.
Use the filters below to find and compare flights from San Francisco to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Wed 22/4

1:45 p.m.-9:42 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Wed 29/4

9:50 a.m.-12:45 p.m.

Nonstop5h 55m

C$ 555

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 8/5

6:00 a.m.-7:50 p.m.

1 stop10h 50m

Toronto Region of Waterloo Intl

Mon 11/5

8:40 p.m.-9:55 p.m.

1 stop28h 15m

C$ 559

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Wed 29/4

6:00 p.m.-6:45 a.m.

1 stop9h 45m

Ottawa

Fri 1/5

7:00 a.m.-12:40 p.m.

1 stop8h 40m

C$ 561

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Wed 8/4

2:30 p.m.-1:36 a.m.

1 stop8h 06m

Ottawa

Wed 15/4

7:45 a.m.-3:32 p.m.

1 stop10h 47m

C$ 561

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 1/5

7:30 p.m.-11:43 a.m.

2 stops13h 13m

London

Tue 5/5

5:40 a.m.-10:50 a.m.

1 stop8h 10m

C$ 565

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Fri 10/4

2:30 p.m.-1:36 a.m.

1 stop8h 06m

Ottawa

Mon 13/4

2:05 p.m.-9:30 p.m.

1 stop10h 25m

C$ 571

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Sun 17/5

6:00 a.m.-5:15 p.m.

1 stop8h 15m

Hamilton

Fri 22/5

6:10 p.m.-12:00 p.m.

1 stop20h 50m

C$ 575

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Tue 14/4

1:45 p.m.-9:42 p.m.

Nonstop4h 57m

Toronto Pearson Intl

Wed 15/4

9:50 a.m.-12:45 p.m.

Nonstop5h 55m

C$ 578

San FranciscoWindsor

SFO - YQG

SFOYQG

San Francisco

Wed 29/4

8:30 a.m.-7:09 p.m.

1 stop7h 39m

Windsor

Sun 3/5

7:45 p.m.-10:50 a.m.

1 stop18h 05m

C$ 582

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 1/5

6:00 a.m.-7:50 p.m.

1 stop10h 50m

Toronto Region of Waterloo Intl

Mon 4/5

8:40 p.m.-12:00 p.m.

1 stop18h 20m

C$ 593

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/3

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of C$ 171). Flying from San Francisco to Region of Ontario in January is currently the most expensive (average of C$ 301). 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 13 March 2026.

It’s optimal to fly from San Francisco to Region of Ontario in the evening. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from San Francisco to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Ontario. Price data was last updated on 12 March 2026.

Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Saturday mornings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 13 March 2026.

The most flights from SFO to CAON are scheduled on a Thursday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost to fly round-trip from San Francisco to Region of Ontario?

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 13 March 2026.
Get a feel of what it's like to fly with Porter Airlines,Air Transat, andUnited Airlines 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
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
423 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Transat
7.7
Good
521 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,421 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
WestJet
7.2
Good
3,293 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
10,800 reviews
Porter Airlines
8.0
Very good
423 reviews
Check prices

Entertainment

7.0

Food

7.6

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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.

  • How long is the flight from San Francisco to Region of Ontario?

    For as low as C$ 555, Porter Airlines can have you in Region of Ontario from San Francisco in 4h 57m. Airlines will cover a distance of 3626 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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$ 102 on WestJet. Other airlines that offer cheap prices include United Airlines from C$ 166 and Porter Airlines from C$ 168 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: Singapore Airlines (66%), Air Canada (62%), United Airlines (62%).

  • 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$ 567, our data indicates the cheapest price to be C$ 183. The most popular route (San Francisco - Toronto Pearson Intl), is priced around C$ 395.

  • 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, February is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of C$ 171). Flying from San Francisco to Region of Ontario in January is currently the most expensive (average of C$ 301). 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 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 193AverageC$ 529FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 239AverageC$ 604FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 285AverageC$ 417FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 485AverageC$ 874FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 485AverageC$ 780FlexibilityNo cancel feeOn-time69%
Search United 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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