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Cheap flights from San Francisco Bay Area to Ontario from C$ 179

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Francisco Bay Area to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco Bay Area to Ontario
Explore the most affordable flight options available from San Francisco Bay Area to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2025.

Thu 4/1210:15 a.m.SFO - YYZ
2 stops17h 43mMultiple Airlines
Wed 10/126:45 p.m.YYZ - SFO
1 stop17h 45mMultiple Airlines
Deal found 30/10C$ 374
Tue 18/1110:15 a.m.SFO - YYZ
2 stops17h 43mMultiple Airlines
Tue 25/119:35 a.m.YYZ - SFO
1 stop25h 16mMultiple Airlines
Deal found 28/10C$ 377
Sun 14/125:46 p.m.SFO - YYZ
1 stop10h 01mMultiple Airlines
Fri 16/18:00 p.m.YYZ - SFO
1 stop22h 53mMultiple Airlines
Deal found 27/10C$ 384
Tue 18/1110:15 a.m.SFO - YYZ
2 stops17h 43mMultiple Airlines
Fri 21/1110:15 p.m.YYZ - SFO
1 stop14h 15mMultiple Airlines
Deal found 28/10C$ 388
Tue 18/1110:15 a.m.SFO - YYZ
2 stops17h 43mMultiple Airlines
Mon 24/119:45 a.m.YYZ - SFO
Nonstop5h 55mMultiple Airlines
Deal found 28/10C$ 392
Mon 15/124:59 p.m.SFO - YYZ
1 stop10h 48mMultiple Airlines
Fri 30/19:35 a.m.YYZ - SFO
1 stop12h 30mMultiple Airlines
Deal found 30/10C$ 397
Sun 14/123:27 p.m.SJC - YYZ
1 stop12h 20mMultiple Airlines
Wed 14/11:30 p.m.YYZ - SJC
2 stops31h 26mMultiple Airlines
Deal found 27/10C$ 415
Sat 29/1110:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Sat 6/124:20 p.m.YOW - SFO
2 stops42h 33mMultiple Airlines
Deal found 30/10C$ 469
Sun 7/123:27 p.m.SJC - YYZ
1 stop11h 53mMultiple Airlines
Tue 16/127:45 a.m.YYZ - SJC
2 stops14h 10mMultiple Airlines
Deal found 28/10C$ 475
Tue 2/1210:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Sun 14/126:00 a.m.YOW - SFO
1 stop9h 12mMultiple Airlines
Deal found 29/10C$ 479
Thu 11/1210:15 a.m.SFO - YUL
1 stop27h 12mMultiple Airlines
Thu 18/126:45 a.m.YUL - SFO
1 stop8h 55mMultiple Airlines
Deal found 28/10C$ 480
Thu 11/1210:15 a.m.SFO - YUL
1 stop27h 12mMultiple Airlines
Sun 14/126:45 a.m.YUL - SFO
1 stop8h 55mMultiple Airlines
Deal found 27/10C$ 489

Cheap flight deals from San Francisco Bay Area to Ontario

Keep the following information in mind while searching for San Francisco Bay Area to Ontario flight deals. Data was last updated 30 October 2025.

Round-trip from

C$ 374

One-way from

C$ 179

Popular in

December

Cheapest in

April

Average price

C$ 588
4/12-10/12
  • 4/12-10/12
  • 3 total stops
  • 35h 28m total
  • San Francisco Bay Area to Ontario
Search Deals
14/12
  • 14/12
  • 1 total stop
  • 12h 20m total
  • San Francisco Bay Area to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco Bay Area 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 30 October 2025.
Use the filters below to find and compare flights from San Francisco Bay Area to Ontario that are best for you.

Fly from

San Francisco Bay Area

Fly to

Ontario

Route

Depart

Return

Price

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 16/1

1:00 p.m.-5:28 a.m.

1 stop13h 28m

Toronto Region of Waterloo Intl

Thu 22/1

6:20 a.m.-12:12 p.m.

1 stop8h 52m

C$ 398

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 30/1

1:00 p.m.-5:28 a.m.

1 stop13h 28m

Toronto Region of Waterloo Intl

Mon 9/2

6:20 a.m.-12:10 p.m.

1 stop8h 50m

C$ 402

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Thu 5/2

10:15 a.m.-11:30 p.m.

1 stop10h 15m

Hamilton

Sun 8/2

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

1 stop21h 00m

C$ 424

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Thu 5/2

1:00 p.m.-1:21 p.m.

1 stop21h 21m

Hamilton

Mon 9/2

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

1 stop21h 00m

C$ 454

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 16/1

1:00 p.m.-5:28 a.m.

1 stop13h 28m

Toronto Region of Waterloo Intl

Sat 17/1

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

1 stop20h 12m

C$ 464

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Sat 31/1

10:15 a.m.-5:16 p.m.

3 stops28h 01m

Hamilton

Mon 2/2

6:10 p.m.-9:30 a.m.

2 stops18h 20m

C$ 472

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Thu 19/2

1:00 p.m.-1:21 p.m.

1 stop21h 21m

Hamilton

Tue 24/2

5:50 a.m.-12:10 p.m.

1 stop9h 20m

C$ 482

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Thu 27/11

1:00 p.m.-12:40 a.m.

1 stop8h 40m

Ottawa

Thu 4/12

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

1 stop9h 12m

C$ 489

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Tue 18/11

10:15 a.m.-5:17 p.m.

3 stops28h 02m

Hamilton

Mon 24/11

6:10 p.m.-9:30 a.m.

2 stops18h 20m

C$ 499

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Thu 27/11

1:00 p.m.-12:40 a.m.

1 stop8h 40m

Ottawa

Thu 4/12

6:45 a.m.-12:40 p.m.

1 stop8h 55m

C$ 503

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/10

Showing 1-10 of 60 results
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Best time to book a flight from San Francisco Bay Area to Ontario

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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to Region of Ontario (average of C$ 177). Flying from San Francisco Bay Area to Region of Ontario in August is currently the most expensive (average of C$ 283). 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 XIH to ON?

Find hourly flight availability from San Francisco Bay Area 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 30 October 2025.

It’s typically best to fly out from San Francisco Bay Area to Region of Ontario in the afternoon. Doing so could potentially save you 54% on the flight price compared to flying in the evening, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from San Francisco Bay Area to Ontario. Price data was last updated on 16 December 2024.

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

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 30 October 2025.
See what other customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from San Francisco Bay Area to Ontario have to say. 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
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Porter Airlines
8.0
Very good
384 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Transat
7.8
Good
469 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
United Airlines
7.4
Good
8,998 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
WestJet
7.2
Good
3,149 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.
Air Canada
7.1
Good
10,376 reviews
Porter Airlines
8.0
Very good
384 reviews
Check prices

Comfort

8.0

Entertainment

7.0

Food

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Sep 2025

YYZ - OPO

Very disappointing, booked with Porter airlines and changed to Air Transit last minute. Old plane, cramped seating, even the aisle was the narrowest I’ve ever seen. Very uncomfortable flight. Full meal at 130 am and only a small piece of banana bread in the morning… should be opposite.

Related info for your journey

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

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

    For as low as C$ 398, WestJet can have you in Region of Ontario from San Francisco Bay Area in 13h 28m. San Francisco Bay Area and Region of Ontario are separated by a distance of 3566 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 Bay Area to Region of Ontario one-way?

    C$ 197 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Alaska Airlines and Porter Airlines, with prices starting from C$ 214 and C$ 229, respectively.

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

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

  • How can I find direct flights from San Francisco Bay Area 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 Bay Area to Ontario.

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

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

    Currently, February is the cheapest month in which you can book a flight from San Francisco Bay Area to Region of Ontario (average of C$ 177). Flying from San Francisco Bay Area to Region of Ontario in August is currently the most expensive (average of C$ 283). 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 Bay Area to Ontario

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Top 5 airlines flying from San Francisco Bay Area to Ontario

Discover the top 5 airlines that operate flights from San Francisco Bay Area 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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 198AverageC$ 545FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 256AverageC$ 682FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 292AverageC$ 448FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air TransatCheapestC$ 303AverageC$ 838FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapestC$ 498AverageC$ 973FlexibilityNo 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 Bay Area to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco Bay Area to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from San Francisco Bay Area.

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

Certainly. Search results for flights to Ontario from San Francisco Bay Area shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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