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Cheap flights from San Francisco Bay Area to Ontario from C$ 106

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 22/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — YYZ
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 334

One-way from

C$ 106

Popular in

December

Cheapest in

April

Average price

C$ 622
14/10-21/10
  • 14/10-21/10
  • 2 total stops
  • 29h 29m total
  • San Francisco Bay Area to Ontario
Search Deals
22/10
  • 22/10
  • 1 total stop
  • 10h 44m total
  • San Francisco Bay Area to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from San Francisco Bay Area to Ontario

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 15 September 2025.

Tue 14/1010:15 a.m.SFO - YHM
1 stop10h 44mMultiple Airlines
Tue 21/105:45 p.m.YHM - SFO
1 stop18h 45mMultiple Airlines
Deal found 14/9C$ 334
Sat 11/1012:50 p.m.SFO - YHM
1 stop8h 50mWestJet
Wed 15/106:00 a.m.YHM - SFO
1 stop8h 54mWestJet
Deal found 14/9C$ 351
Fri 10/107:30 a.m.SFO - YYZ
2 stops10h 31mWestJet
Wed 15/1010:20 p.m.YYZ - SFO
2 stops26h 04mWestJet
Deal found 15/9C$ 355
Fri 3/1012:50 p.m.SFO - YYZ
2 stops14h 01mWestJet
Mon 6/106:30 a.m.YYZ - SFO
1 stop10h 27mWestJet
Deal found 15/9C$ 358
Wed 22/108:00 a.m.SFO - YYZ
1 stop8h 58mMultiple Airlines
Sun 26/109:45 a.m.YYZ - SFO
Nonstop5h 55mMultiple Airlines
Deal found 15/9C$ 361
Sun 2/1110:15 a.m.SFO - YYZ
1 stop11h 23mMultiple Airlines
Fri 7/119:45 a.m.YYZ - SFO
Nonstop5h 55mMultiple Airlines
Deal found 15/9C$ 362
Sun 28/97:30 a.m.SFO - YYZ
2 stops14h 01mMultiple Airlines
Mon 29/99:45 a.m.YYZ - SFO
Nonstop5h 38mMultiple Airlines
Deal found 12/9C$ 363
Fri 31/101:00 p.m.SFO - YYZ
1 stop8h 26mMultiple Airlines
Fri 7/119:45 a.m.YYZ - SFO
Nonstop5h 55mMultiple Airlines
Deal found 14/9C$ 365
Mon 29/97:30 a.m.SFO - YYZ
2 stops10h 31mWestJet
Thu 2/1010:25 p.m.YYZ - SFO
1 stop25h 59mWestJet
Deal found 13/9C$ 366
Fri 31/101:00 p.m.SFO - YYZ
1 stop8h 26mMultiple Airlines
Wed 5/119:45 a.m.YYZ - SFO
Nonstop5h 55mMultiple Airlines
Deal found 14/9C$ 367
Wed 15/1010:15 a.m.SFO - YOW
1 stop25h 29mMultiple Airlines
Wed 22/103:45 p.m.YOW - SFO
2 stops19h 59mMultiple Airlines
Deal found 15/9C$ 367
Thu 9/107:30 a.m.SFO - YYZ
2 stops14h 01mWestJet
Tue 14/1010:25 p.m.YYZ - SFO
1 stop16h 29mWestJet
Deal found 15/9C$ 369

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 15 September 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 FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Tue 14/10

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

1 stop10h 44m

Hamilton

Tue 21/10

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

1 stop18h 45m

C$ 334

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Fri 31/10

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

1 stop8h 40m

Ottawa

Sun 2/11

5:00 a.m.-11:12 a.m.

1 stop9h 12m

C$ 369

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 6/3

1:00 p.m.-5:29 a.m.

1 stop13h 29m

Toronto Region of Waterloo Intl

Thu 12/3

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

1 stop8h 50m

C$ 372

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Sat 11/10

12:50 p.m.-4:19 p.m.

2 stops24h 29m

Ottawa

Thu 16/10

5:15 p.m.-9:24 p.m.

2 stops31h 09m

C$ 379

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Thu 16/10

10:15 a.m.-12:45 a.m.

2 stops11h 30m

Toronto Region of Waterloo Intl

Sun 19/10

6:15 a.m.-9:24 p.m.

2 stops18h 09m

C$ 380

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Thu 30/10

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

1 stop8h 40m

Ottawa

Sun 2/11

5:00 a.m.-11:12 a.m.

1 stop9h 12m

C$ 384

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Thu 30/10

10:15 a.m.-2:44 p.m.

1 stop25h 29m

Ottawa

Thu 6/11

5:40 a.m.-5:49 p.m.

2 stops15h 09m

C$ 387

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Thu 27/11

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

1 stop8h 40m

Ottawa

Mon 1/12

5:45 p.m.-12:12 p.m.

1 stop21h 27m

C$ 388

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Wed 8/10

12:50 p.m.-12:40 a.m.

1 stop8h 50m

Hamilton

Wed 15/10

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

1 stop8h 54m

C$ 390

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Sat 11/10

12:50 p.m.-12:40 a.m.

1 stop8h 50m

Hamilton

Wed 15/10

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

1 stop8h 54m

C$ 402

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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, January is the cheapest month in which you can book a flight from San Francisco Bay Area to Region of Ontario (average of C$ 169). Flying from San Francisco Bay Area 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 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 15 September 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco Bay Area to Region of Ontario as you normally would.

Weekly flight availability from San Francisco Bay Area to Region of Ontario

Explore weekly flight availability from San Francisco Bay Area 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 September 2025.

The most flights from zzXIH to CAON are scheduled on a Monday (25 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (21 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 15 September 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
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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
7.9
Good
363 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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
7.7
Good
438 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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
8,929 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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
3,091 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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
10,000 reviews
Porter Airlines
7.9
Good
363 reviews
Check prices

Crew

8.6

Food

7.6

Comfort

7.9

Entertainment

7.0

Overall

7.9

Boarding

8.1

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$ 431, WestJet can have you in Region of Ontario from San Francisco Bay Area in 8h 30m. San Francisco Bay Area and Region of Ontario are separated by a distance of 3644 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$ 146 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from C$ 198 and C$ 221, 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, January is the cheapest month in which you can book a flight from San Francisco Bay Area to Region of Ontario (average of C$ 169). Flying from San Francisco Bay Area 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 Bay Area 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 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapestC$ 196AverageC$ 541FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 257AverageC$ 679FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 260AverageC$ 722FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air TransatCheapestC$ 300AverageC$ 648FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
WestJetCheapestC$ 320AverageC$ 444FlexibilityNo 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 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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