What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?

C$ 212 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from C$ 236 and C$ 238, respectively.

How far in advance should I book a flight from Region of Ontario to San Francisco Bay Area?

To save on the cost of your flight from Region of Ontario to San Francisco Bay Area, book at least 47 days before your planned departure. Booking around this time can save you about 72% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 592 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 971.

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

March can be a great time to fly to San Francisco Bay Area from Region of Ontario with a flight ticket averaging about C$ 563. Cheapflights users have found deals in the month of March for as cheap as C$ 337. The most expensive prices can be found in the month of December.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco Bay Area.

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

Yes. Cheapflights offers flight deals from Ontario to San Francisco Bay Area by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 190+ Flights from Ontario to San Francisco Bay Area - Compare & Save Big

Cheap flight deals from Ontario to San Francisco Bay Area

Round-trip from	C$ 363
One-way from	C$ 190
Popular in	December
Cheapest in	March
Average price	C$ 468

27/5-3/6
2 total stops
31h 04m total
Ontario to San Francisco Bay Area

Search Deals

18/6
1 total stop
13h 58m total
Ontario to San Francisco Bay Area

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (C$ 9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Ontario to San Francisco Bay Area

Cheapest flights from Ontario to San Francisco Bay Area
Explore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Wed 9/76:00 a.m.YHM - SFO

1 stop9h 05mWestJet

Wed 23/712:50 p.m.SFO - YHM

1 stop8h 51mWestJet

Deal found 27/4C$ 340

Fri 23/510:00 a.m.YYZ - SFO

1 stop10h 15mWestJet

Sun 25/56:05 p.m.SFO - YYZ

1 stop9h 09mWestJet

Deal found 28/4C$ 356

Fri 29/86:00 a.m.YKF - SFO

2 stops10h 59mWestJet

Sun 7/912:50 p.m.SFO - YKF

1 stop8h 55mWestJet

Deal found 28/4C$ 359

Thu 14/85:45 a.m.YOW - SFO

1 stop11h 14mWestJet

Sun 17/86:05 p.m.SFO - YOW

1 stop9h 40mWestJet

Deal found 28/4C$ 359

Wed 28/52:00 p.m.YYZ - SJC

2 stops23h 05mMultiple Airlines

Mon 2/64:33 p.m.SJC - YYZ

3 stops34h 18mMultiple Airlines

Deal found 27/4C$ 370

Tue 10/610:40 a.m.YYZ - SFO

1 stop23h 51mMultiple Airlines

Mon 16/69:43 p.m.SFO - YYZ

2 stops20h 11mMultiple Airlines

Deal found 28/4C$ 376

Fri 23/57:00 a.m.YTZ - SFO

2 stops13h 53mMultiple Airlines

Sun 25/55:45 a.m.SFO - YTZ

2 stops13h 37mMultiple Airlines

Deal found 28/4C$ 391

Wed 28/512:30 p.m.YYZ - SJC

2 stops9h 55mDelta

Fri 6/67:00 a.m.SJC - YYZ

2 stops12h 58mDelta

Deal found 28/4C$ 399

Mon 9/66:45 a.m.YUL - SFO

2 stops13h 30mWestJet

Tue 10/612:50 p.m.SFO - YUL

1 stop8h 53mWestJet

Deal found 28/4C$ 400

Sun 11/56:45 a.m.YYZ - SJC

1 stop9h 40mAmerican Airlines

Sat 17/52:15 p.m.SJC - YYZ

1 stop19h 15mAmerican Airlines

Deal found 28/4C$ 410

Fri 23/56:00 a.m.YKF - SFO

1 stop9h 05mMultiple Airlines

Sun 25/510:15 a.m.SFO - YKF

2 stops40h 15mMultiple Airlines

Deal found 28/4C$ 423

Sat 31/59:45 a.m.YYZ - OAK

2 stops15h 40mMultiple Airlines

Mon 2/69:09 p.m.OAK - YYZ

1 stop30h 11mMultiple Airlines

Deal found 28/4C$ 425

Best flights from Ontario to San Francisco Bay Area
Discover carefully curated flight deals from Ontario to San Francisco Bay Area that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 April 2025.

Tue 27/510:25 p.m.YYZ - SFO

1 stop14h 05mMultiple Airlines

Tue 3/610:15 a.m.SFO - YYZ

1 stop16h 59mMultiple Airlines

Deal found 29/4C$ 363

Wed 2/76:00 a.m.YKF - SFO

1 stop9h 05mWestJet

Thu 14/87:30 a.m.SFO - YKF

1 stop8h 26mWestJet

Deal found 29/4C$ 364

Wed 28/512:30 p.m.YYZ - SJC

1 stop11h 01mDelta

Fri 6/67:00 a.m.SJC - YYZ

2 stops12h 58mDelta

Deal found 28/4C$ 399

Sun 11/56:45 a.m.YYZ - SJC

1 stop9h 40mAmerican Airlines

Sat 17/52:15 p.m.SJC - YYZ

1 stop19h 15mAmerican Airlines

Deal found 28/4C$ 410

Mon 5/55:30 p.m.YYZ - SJC

2 stops21h 33mUnited Airlines

Mon 12/56:45 p.m.SJC - YYZ

2 stops11h 34mUnited Airlines

Deal found 27/4C$ 445

Thu 29/58:05 a.m.YUL - SJC

1 stop12h 17mAir Canada

Sun 1/67:00 a.m.SJC - YUL

1 stop13h 26mAir Canada

Deal found 28/4C$ 453

Fri 23/56:45 a.m.YUL - SFO

1 stop8h 45mPorter Airlines

Wed 28/51:30 p.m.SFO - YUL

1 stop8h 07mPorter Airlines

Deal found 28/4C$ 486

Fri 9/59:25 a.m.YKF - SFO

1 stop27h 05mFlair Airlines

Mon 12/510:15 a.m.SFO - YKF

1 stop17h 55mFlair Airlines

Deal found 28/4C$ 520

Thu 16/104:45 p.m.YYZ - OAK

1 stop9h 53mAlaska Airlines

Tue 21/107:50 p.m.OAK - YYZ

1 stop16h 10mAlaska Airlines

Deal found 28/4C$ 550

Wed 28/52:00 p.m.YYZ - SJC

2 stops23h 05mMultiple Airlines

Mon 2/64:33 p.m.SJC - YYZ

3 stops34h 18mMultiple Airlines

Deal found 27/4C$ 370

Wed 16/712:00 p.m.YYZ - SFO

2 stops12h 25mWestJet

Sun 20/72:45 p.m.SFO - YYZ

2 stops12h 27mWestJet

Deal found 28/4C$ 371

Tue 22/73:35 p.m.YOW - SFO

1 stop8h 50mWestJet

Wed 30/72:45 p.m.SFO - YOW

1 stop31h 03mWestJet

Deal found 28/4C$ 387

Direct flights from Ontario to San Francisco Bay Area
Explore direct flight options from Ontario to San Francisco Bay Area based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 April 2025.

Thu 22/59:45 a.m.YYZ - SFO

Nonstop5h 45mPorter Airlines

Tue 27/51:30 p.m.SFO - YYZ

Nonstop4h 59mPorter Airlines

Deal found 27/4C$ 446

Mon 30/68:15 a.m.YYZ - SFO

Nonstop5h 33mUnited Airlines

Tue 15/74:50 p.m.SFO - YYZ

Nonstop4h 54mUnited Airlines

Deal found 28/4C$ 495

Sat 24/58:10 a.m.YUL - SFO

Nonstop6h 25mAir Canada

Thu 29/511:25 a.m.SFO - YUL

Nonstop5h 40mAir Canada

Deal found 28/4C$ 499

Tue 24/68:05 a.m.YUL - SFO

Nonstop6h 10mUnited Airlines

Sun 6/711:47 p.m.SFO - YUL

Nonstop5h 29mUnited Airlines

Deal found 28/4C$ 502

Fri 13/68:30 a.m.YYZ - SFO

Nonstop5h 42mAir Canada

Fri 20/68:40 a.m.SFO - YYZ

Nonstop4h 55mAir Canada

Deal found 28/4C$ 506

Sat 31/56:30 a.m.YYZ - SFO

Nonstop5h 37mMultiple Airlines

Sun 22/610:55 p.m.SFO - YYZ

Nonstop4h 54mMultiple Airlines

Deal found 28/4C$ 522

Thu 26/69:45 a.m.YYZ - SFO

Nonstop5h 45mAir Transat

Wed 2/71:25 p.m.SFO - YYZ

Nonstop5h 02mAir Transat

Deal found 27/4C$ 579

Sat 10/54:45 p.m.YUL - SFO

Nonstop6h 25mBrussels Airlines

Sun 11/58:15 a.m.SFO - YUL

Nonstop5h 40mBrussels Airlines

Deal found 28/4C$ 823

Last-minute flights from Ontario to San Francisco Bay Area
Discover last-minute flight deals from Ontario to San Francisco Bay Area. Data last updated 29 April 2025 and is based on user searches.

Mon 5/55:30 p.m.YYZ - SJC

2 stops21h 33mUnited Airlines

Mon 12/56:45 p.m.SJC - YYZ

2 stops11h 34mUnited Airlines

Deal found 27/4C$ 445

Tue 6/57:55 a.m.YYZ - SFO

2 stops32h 08mMultiple Airlines

Tue 13/52:03 p.m.SFO - YYZ

1 stop24h 17mMultiple Airlines

Deal found 27/4C$ 477

Tue 6/54:45 p.m.YYZ - SFO

2 stops18h 17mAlaska Airlines

Wed 7/53:24 p.m.SFO - YYZ

2 stops20h 36mAlaska Airlines

Deal found 28/4C$ 565

Tue 6/510:00 a.m.YYZ - SFO

1 stop26h 30mFlair Airlines

Tue 13/510:15 a.m.SFO - YYZ

1 stop11h 10mFlair Airlines

Deal found 28/4C$ 571

Thu 8/55:20 p.m.YYZ - SJC

1 stop23h 05mAmerican Airlines

Sat 17/52:15 p.m.SJC - YYZ

1 stop19h 15mAmerican Airlines

Deal found 28/4C$ 438

Thu 8/53:00 p.m.YTZ - SFO

1 stop11h 05mMultiple Airlines

Sun 11/510:15 a.m.SFO - YTZ

2 stops30h 12mMultiple Airlines

Deal found 28/4C$ 561

Fri 9/55:50 p.m.YYZ - SJC

1 stop8h 51mDelta

Tue 13/512:26 p.m.SJC - YYZ

1 stop8h 30mDelta

Deal found 28/4C$ 441

Fri 9/59:25 a.m.YKF - SFO

1 stop27h 05mFlair Airlines

Mon 12/510:15 a.m.SFO - YKF

1 stop17h 55mFlair Airlines

Deal found 28/4C$ 520

Fri 9/54:18 p.m.YYZ - SJC

1 stop8h 07mAir Canada

Sun 18/58:30 a.m.SJC - YYZ

2 stops20h 03mAir Canada

Deal found 28/4C$ 542

Fri 9/56:30 a.m.YYZ - SFO

1 stop8h 35mWestJet

Mon 12/512:50 p.m.SFO - YYZ

1 stop8h 36mWestJet

Deal found 28/4C$ 547

Fri 9/59:25 a.m.YKF - SFO

1 stop27h 05mMultiple Airlines

Mon 12/512:50 p.m.SFO - YKF

2 stops13h 40mMultiple Airlines

Deal found 28/4C$ 567

Fri 9/511:00 a.m.YYZ - OAK

2 stops32h 41mMultiple Airlines

Mon 12/511:51 a.m.OAK - YYZ

3 stops32h 05mMultiple Airlines

Deal found 28/4C$ 579

One-way flights from Ontario to San Francisco Bay Area
Search for one-way flight options from Ontario to San Francisco Bay Area. Find affordable one-way fares based on user searches. Data last updated 29 April 2025.

Wed 18/69:45 a.m.YYZ - OAK

1 stop13h 58mMultiple Airlines

Deal found 29/4C$ 190

Tue 3/69:45 a.m.YYZ - SJC

2 stops32h 48mMultiple Airlines

Deal found 29/4C$ 205

Tue 1/76:00 a.m.YHM - SFO

1 stop9h 05mWestJet

Deal found 29/4C$ 212

Thu 26/63:45 p.m.YOW - SFO

1 stop8h 40mWestJet

Deal found 28/4C$ 213

Fri 30/56:55 a.m.YYZ - SFO

2 stops17h 24mMultiple Airlines

Deal found 29/4C$ 229

Sun 1/66:00 a.m.YKF - SFO

1 stop9h 05mWestJet

Deal found 29/4C$ 230

Wed 25/61:30 p.m.YYZ - SFO

1 stop10h 55mWestJet

Deal found 29/4C$ 231

Wed 28/53:45 p.m.YOW - SFO

2 stops23h 39mMultiple Airlines

Deal found 28/4C$ 236

Fri 30/55:20 p.m.YYZ - SJC

1 stop23h 05mAmerican Airlines

Deal found 28/4C$ 236

Sat 24/512:15 p.m.YYZ - SJC

2 stops10h 10mDelta

Deal found 28/4C$ 238

Wed 23/76:45 a.m.YUL - SFO

2 stops13h 30mWestJet

Deal found 28/4C$ 240

Fri 4/76:45 a.m.YUL - SFO

1 stop8h 38mPorter Airlines

Deal found 28/4C$ 241

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Francisco Bay Area that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 9/7

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

1 stop9h 05m

San Francisco

Wed 23/7

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

1 stop8h 51m

C$ 340

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 23/5

10:00 a.m.-5:15 p.m.

1 stop10h 15m

San Francisco

Sun 25/5

6:05 p.m.-6:14 a.m.

1 stop9h 09m

C$ 356

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Fri 29/8

6:00 a.m.-1:59 p.m.

2 stops10h 59m

San Francisco

Mon 8/9

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

1 stop8h 55m

C$ 359

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 28/5

2:00 p.m.-10:05 a.m.

2 stops23h 05m

San Jose

Mon 2/6

4:33 p.m.-5:51 a.m.

3 stops34h 18m

C$ 370

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Tue 10/6

10:40 a.m.-7:31 a.m.

1 stop23h 51m

San Francisco

Mon 16/6

9:43 p.m.-8:54 p.m.

2 stops20h 11m

C$ 376

TorontoSan Francisco

YTZ - SFO

YTZSFO

Toronto Island

Fri 23/5

7:00 a.m.-5:53 p.m.

2 stops13h 53m

San Francisco

Sun 25/5

5:45 a.m.-10:22 p.m.

2 stops13h 37m

C$ 391

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Wed 28/5

12:30 p.m.-8:31 p.m.

1 stop11h 01m

San Jose

Fri 6/6

7:00 a.m.-10:58 p.m.

2 stops12h 58m

C$ 399

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Mon 9/6

6:45 a.m.-5:15 p.m.

2 stops13h 30m

San Francisco

Tue 10/6

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

1 stop8h 53m

C$ 400

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Sun 11/5

6:45 a.m.-1:25 p.m.

1 stop9h 40m

San Jose

Sat 17/5

2:15 p.m.-12:30 p.m.

1 stop19h 15m

C$ 410

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Fri 23/5

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

1 stop9h 05m

San Francisco

Sun 25/5

10:15 a.m.-5:30 a.m.

2 stops40h 15m

C$ 423

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/4

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to San Francisco Bay Area

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

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 276). Flying from Region of Ontario to San Francisco Bay Area in June is currently the most expensive (average of C$ 379). 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 ON to XIH?

When flying from Region of Ontario to San Francisco Bay Area, 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 Region of Ontario to San Francisco Bay Area

The most flights from CAON to zzXIH are scheduled on a Tuesday (21 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in San Francisco Bay Area by month

In terms of precipitation, rainfall in San Francisco Bay Area ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco Bay Area when rainfall is around 0.0 mm.

Temperature in San Francisco Bay Area by month

If weather is an important factor for your trip to San Francisco Bay Area, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing San Francisco Bay Area

See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta from Ontario to San Francisco Bay Area have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,961 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Porter Airlines

8.0

Very good

285 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,929 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Air Transat

7.8

Good

385 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?
C$ 212 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from C$ 236 and C$ 238, respectively.
Can I find deals for flights from Ontario to San Francisco Bay Area that include hotel bookings?
Yes. In addition to deals on Ontario to San Francisco Bay Area flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to San Francisco Bay Area?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco Bay Area.
Can I find deals for business class flights from Ontario to San Francisco Bay Area?
Yes. Cheapflights offers flight deals from Ontario to San Francisco Bay Area 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 Region of Ontario to San Francisco Bay Area?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 276). Flying from Region of Ontario to San Francisco Bay Area in June is currently the most expensive (average of C$ 379). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 9 airlines flying from Ontario to San Francisco Bay Area

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 271	AverageC$ 610	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
WestJet	CheapestC$ 287	AverageC$ 490	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Delta	CheapestC$ 295	AverageC$ 485	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 330	AverageC$ 617	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Porter Airlines	CheapestC$ 347	AverageC$ 631	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 358	AverageC$ 743	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Alaska Airlines	CheapestC$ 390	AverageC$ 672	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Air Transat	CheapestC$ 413	AverageC$ 514	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
WestJet Encore	CheapestC$ 646	AverageC$ 703	FlexibilityNo cancel fee	On-timeN/A	Search WestJet Encore flights

Fly with Cheapflights

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

Cheapflights simply makes it quick and affordable to book flights from Ontario to San Francisco Bay Area by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to San Francisco Bay Area from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes! Start tracking prices for Ontario to San Francisco Bay Area flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Ontario to San Francisco Bay Area from C$ 190

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 18/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to San Francisco Bay Area

Keep the following information in mind while searching for Ontario to San Francisco Bay Area flight deals. Data was last updated 29 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Ontario to San Francisco Bay Area

Cheapest flights from Ontario to San Francisco Bay AreaExplore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Explore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Francisco Bay Area that are best for you.

Best time to book a flight from Ontario to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Francisco Bay Area

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

What is the cheapest time of day to fly from ON to XIH?

Find hourly flight availability from Ontario to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

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

Rainfall in San Francisco Bay Area by month

Plan your trip to San Francisco Bay Area by taking into account the average rainfall totals by month.

Temperature in San Francisco Bay Area by month

Plan your trip to San Francisco Bay Area by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco Bay Area

See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta from Ontario to San Francisco Bay Area have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?

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

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

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

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

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Alternative routes for Ontario to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Ontario to San Francisco Bay Area

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

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

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Cheapest flights from Ontario to San Francisco Bay Area
Explore the most affordable flight options available from Ontario to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 April 2025.