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

C$ 201 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Flair Airlines, with prices starting from C$ 225 and C$ 228, 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 58 days before your planned departure. Booking around this time can save you about 66% on the cost of this flight compared to booking a flight leaving this week. We have found prices from C$ 602 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as C$ 987.

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$ 578. Cheapflights users have found deals in the month of March for as cheap as C$ 344. The most expensive prices can be found in the month of July.

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$ 193+ Flights from Ontario to San Francisco Bay Area

Cheap flight deals from Ontario to San Francisco Bay Area

Round-trip from	C$ 333
One-way from	C$ 193
Popular in	July
Cheapest in	March
Average price	C$ 473

WestJet
29/8-7/9
3 total stops
19h 49m total
Ontario to San Francisco Bay Area

Search Deals

29/4
1 total stop
28h 07m total
Ontario to San Francisco Bay Area

Search Deals

Highest demand for flights based on searches. 13% potential increase in price (C$ 124 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 17 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 10 April 2025.

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

2 stops10h 59mWestJet

Mon 8/912:50 p.m.SFO - YHM

1 stop8h 50mWestJet

Deal found 9/4C$ 333

Tue 2/96:00 a.m.YKF - SFO

1 stop8h 54mWestJet

Thu 11/97:30 a.m.SFO - YKF

1 stop8h 25mWestJet

Deal found 9/4C$ 340

Thu 24/47:25 p.m.YYZ - SFO

1 stop15h 20mMultiple Airlines

Wed 30/41:45 p.m.SFO - YYZ

1 stop13h 10mMultiple Airlines

Deal found 9/4C$ 342

Fri 29/89:00 a.m.YYZ - SFO

1 stop11h 15mWestJet

Sun 7/97:30 a.m.SFO - YYZ

1 stop8h 22mWestJet

Deal found 9/4C$ 343

Mon 30/65:45 a.m.YOW - SFO

1 stop11h 14mWestJet

Sat 5/73:40 p.m.SFO - YOW

1 stop10h 45mWestJet

Deal found 9/4C$ 361

Mon 12/59:45 a.m.YYZ - SJC

2 stops27h 20mMultiple Airlines

Thu 22/52:33 p.m.SJC - YYZ

1 stop13h 09mMultiple Airlines

Deal found 9/4C$ 380

Mon 21/47:25 p.m.YYZ - OAK

1 stop16h 37mMultiple Airlines

Tue 6/56:40 p.m.OAK - YYZ

2 stops25h 16mMultiple Airlines

Deal found 10/4C$ 380

Tue 29/46:45 a.m.YUL - SFO

1 stop8h 54mPorter Airlines

Tue 13/51:30 p.m.SFO - YUL

1 stop8h 07mPorter Airlines

Deal found 8/4C$ 384

Thu 29/56:00 a.m.YKF - SFO

1 stop9h 05mMultiple Airlines

Mon 2/610:15 a.m.SFO - YKF

1 stop17h 55mMultiple Airlines

Deal found 8/4C$ 388

Tue 12/86:45 a.m.YUL - SFO

2 stops13h 30mWestJet

Mon 18/812:50 p.m.SFO - YUL

1 stop8h 53mWestJet

Deal found 9/4C$ 388

Thu 24/49:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Tue 29/41:40 p.m.SFO - YYZ

Nonstop5h 02mPorter Airlines

Deal found 9/4C$ 388

Fri 2/512:20 p.m.YOW - SFO

2 stops12h 05mMultiple Airlines

Tue 6/510:15 a.m.SFO - YOW

1 stop25h 29mMultiple Airlines

Deal found 9/4C$ 401

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 10 April 2025.

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

2 stops10h 59mWestJet

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

1 stop8h 50mWestJet

Deal found 9/4C$ 333

Thu 24/47:25 p.m.YYZ - SFO

1 stop15h 20mMultiple Airlines

Wed 30/41:45 p.m.SFO - YYZ

1 stop13h 10mMultiple Airlines

Deal found 9/4C$ 342

Tue 29/46:45 a.m.YUL - SFO

1 stop8h 54mPorter Airlines

Tue 13/51:30 p.m.SFO - YUL

1 stop8h 07mPorter Airlines

Deal found 8/4C$ 384

Wed 23/45:25 p.m.YYZ - SFO

Nonstop5h 42mAir Canada

Wed 30/44:40 p.m.SFO - YYZ

Nonstop5h 01mAir Canada

Deal found 9/4C$ 415

Sat 24/58:25 p.m.YKF - SFO

1 stop16h 05mFlair Airlines

Sat 31/510:15 a.m.SFO - YKF

1 stop17h 55mFlair Airlines

Deal found 9/4C$ 422

Thu 24/46:00 a.m.YYZ - SJC

2 stops19h 47mAmerican Airlines

Tue 29/412:50 p.m.SJC - YYZ

2 stops19h 15mAmerican Airlines

Deal found 9/4C$ 437

Thu 24/41:27 p.m.YYZ - SJC

1 stop11h 29mDelta

Tue 29/41:05 p.m.SJC - YYZ

1 stop7h 50mDelta

Deal found 9/4C$ 438

Thu 24/47:00 p.m.YYZ - SFO

Nonstop5h 49mUnited Airlines

Tue 29/412:43 a.m.SFO - YYZ

1 stop18h 53mUnited Airlines

Deal found 9/4C$ 478

Thu 24/44:45 p.m.YYZ - SFO

1 stop9h 59mAlaska Airlines

Mon 28/48:00 a.m.SFO - YYZ

1 stop28h 00mAlaska Airlines

Deal found 10/4C$ 486

Thu 24/49:45 a.m.YYZ - SFO

Nonstop5h 54mAir Transat

Wed 30/41:40 p.m.SFO - YYZ

Nonstop5h 02mAir Transat

Deal found 9/4C$ 490

Tue 2/96:00 a.m.YKF - SFO

1 stop8h 54mWestJet

Thu 11/97:30 a.m.SFO - YKF

1 stop8h 25mWestJet

Deal found 9/4C$ 340

Fri 29/89:00 a.m.YYZ - SFO

1 stop11h 15mWestJet

Sun 7/97:30 a.m.SFO - YYZ

1 stop8h 22mWestJet

Deal found 9/4C$ 343

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 10 April 2025.

Tue 15/79:45 a.m.YYZ - SFO

Nonstop5h 38mPorter Airlines

Wed 23/71:25 p.m.SFO - YYZ

Nonstop5h 02mPorter Airlines

Deal found 9/4C$ 371

Wed 23/46:55 p.m.YYZ - SFO

Nonstop5h 42mAir Canada

Tue 29/49:50 a.m.SFO - YYZ

Nonstop5h 05mAir Canada

Deal found 9/4C$ 412

Fri 25/46:55 p.m.YYZ - SFO

Nonstop5h 42mUnited Airlines

Tue 29/44:40 p.m.SFO - YYZ

Nonstop5h 01mUnited Airlines

Deal found 9/4C$ 479

Thu 24/49:45 a.m.YYZ - SFO

Nonstop5h 54mAir Transat

Wed 30/41:40 p.m.SFO - YYZ

Nonstop5h 02mAir Transat

Deal found 9/4C$ 490

Thu 1/58:10 a.m.YUL - SFO

Nonstop6h 25mAir Canada

Fri 30/511:55 p.m.SFO - YUL

Nonstop5h 29mAir Canada

Deal found 9/4C$ 498

Tue 17/68:10 a.m.YUL - SFO

Nonstop6h 25mUnited Airlines

Mon 23/611:55 p.m.SFO - YUL

Nonstop5h 29mUnited Airlines

Deal found 9/4C$ 503

Wed 23/46:30 a.m.YYZ - SFO

Nonstop5h 49mMultiple Airlines

Thu 29/58:35 a.m.SFO - YYZ

Nonstop5h 00mMultiple Airlines

Deal found 9/4C$ 505

Thu 8/58:10 a.m.YUL - SFO

Nonstop6h 25mMultiple Airlines

Fri 16/58:15 a.m.SFO - YUL

Nonstop5h 40mMultiple Airlines

Deal found 9/4C$ 608

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 10 April 2025 and is based on user searches.

Tue 15/47:25 p.m.YYZ - OAK

1 stop18h 12mMultiple Airlines

Sat 19/41:49 p.m.OAK - YYZ

1 stop29h 01mMultiple Airlines

Deal found 10/4C$ 428

Tue 15/47:25 p.m.YYZ - SJC

1 stop20h 44mMultiple Airlines

Sat 19/46:35 p.m.SJC - YYZ

1 stop24h 15mMultiple Airlines

Deal found 10/4C$ 547

Tue 15/412:00 p.m.YYZ - SJC

2 stops13h 49mWestJet

Sat 19/41:45 p.m.SJC - YYZ

2 stops13h 32mWestJet

Deal found 8/4C$ 571

Tue 15/44:45 p.m.YYZ - SFO

2 stops23h 19mAlaska Airlines

Tue 22/48:00 a.m.SFO - YYZ

1 stop28h 00mAlaska Airlines

Deal found 8/4C$ 574

Tue 15/49:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Tue 22/41:40 p.m.SFO - YYZ

Nonstop5h 02mPorter Airlines

Deal found 8/4C$ 604

Wed 16/42:00 p.m.YYZ - SJC

1 stop11h 46mUnited Airlines

Tue 29/43:30 p.m.SJC - YYZ

2 stops15h 34mUnited Airlines

Deal found 9/4C$ 513

Wed 16/47:00 p.m.YYZ - SFO

Nonstop5h 49mAir Canada

Tue 29/48:30 a.m.SFO - YYZ

Nonstop5h 00mAir Canada

Deal found 9/4C$ 608

Thu 17/46:35 p.m.YUL - SJC

2 stops22h 00mUnited Airlines

Mon 21/46:27 p.m.SJC - YUL

2 stops20h 23mUnited Airlines

Deal found 8/4C$ 570

Sat 19/49:25 a.m.YYZ - SJC

2 stops15h 00mAir Canada

Sun 20/48:30 a.m.SJC - YYZ

1 stop11h 21mAir Canada

Deal found 10/4C$ 580

Sun 20/47:25 p.m.YYZ - SFO

1 stop15h 20mMultiple Airlines

Wed 7/58:30 a.m.SFO - YYZ

1 stop12h 42mMultiple Airlines

Deal found 10/4C$ 412

Sun 20/46:00 a.m.YYZ - SJC

2 stops18h 28mAmerican Airlines

Fri 2/57:20 p.m.SJC - YYZ

2 stops14h 15mAmerican Airlines

Deal found 9/4C$ 447

Sun 20/411:34 a.m.YYZ - SJC

1 stop13h 22mDelta

Mon 28/45:45 a.m.SJC - YYZ

1 stop7h 53mDelta

Deal found 9/4C$ 448

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 10 April 2025.

Tue 29/45:50 p.m.YYZ - SJC

1 stop28h 07mMultiple Airlines

Deal found 9/4C$ 193

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

2 stops10h 59mWestJet

Deal found 9/4C$ 201

Mon 19/58:05 p.m.YYZ - OAK

1 stop29h 20mMultiple Airlines

Deal found 10/4C$ 203

Fri 2/57:00 a.m.YTZ - SJC

2 stops14h 41mMultiple Airlines

Deal found 9/4C$ 204

Sun 8/66:00 a.m.YOW - SFO

1 stop9h 05mWestJet

Deal found 9/4C$ 220

Wed 14/512:00 p.m.YYZ - SFO

2 stops12h 25mWestJet

Deal found 10/4C$ 220

Fri 11/76:00 a.m.YKF - SFO

2 stops10h 59mWestJet

Deal found 9/4C$ 221

Wed 23/49:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Deal found 9/4C$ 225

Sat 10/59:45 a.m.YYZ - SFO

1 stop13h 42mMultiple Airlines

Deal found 9/4C$ 227

Sat 10/59:00 p.m.YYZ - SFO

1 stop15h 30mFlair Airlines

Deal found 10/4C$ 228

Tue 20/56:45 a.m.YUL - SFO

2 stops13h 30mWestJet

Deal found 9/4C$ 231

Wed 7/57:00 a.m.YTZ - SFO

2 stops27h 44mMultiple Airlines

Deal found 9/4C$ 234

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

Fri 29/8

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

2 stops10h 59m

San Francisco

Sun 7/9

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

1 stop8h 50m

C$ 333

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Tue 2/9

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

1 stop8h 54m

San Francisco

Thu 11/9

7:30 a.m.-6:55 p.m.

1 stop8h 25m

C$ 340

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Thu 24/4

7:25 p.m.-7:45 a.m.

1 stop15h 20m

San Francisco

Wed 30/4

1:45 p.m.-5:55 a.m.

1 stop13h 10m

C$ 342

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 29/8

9:00 a.m.-5:15 p.m.

1 stop11h 15m

San Francisco

Mon 8/9

6:05 p.m.-6:52 a.m.

1 stop9h 47m

C$ 343

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Mon 30/6

5:45 a.m.-1:59 p.m.

1 stop11h 14m

San Francisco

Sat 5/7

3:40 p.m.-5:25 a.m.

1 stop10h 45m

C$ 361

TorontoSan Jose

YYZ - SJC

YYZSJC

Toronto Pearson Intl

Mon 12/5

9:45 a.m.-10:05 a.m.

2 stops27h 20m

San Jose

Thu 22/5

2:33 p.m.-6:42 a.m.

1 stop13h 09m

C$ 380

TorontoOakland

YYZ - OAK

YYZOAK

Toronto Pearson Intl

Mon 21/4

7:25 p.m.-9:02 a.m.

1 stop16h 37m

Oakland

Tue 6/5

6:40 p.m.-10:56 p.m.

2 stops25h 16m

C$ 380

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 29/4

6:45 a.m.-12:39 p.m.

1 stop8h 54m

San Francisco

Tue 13/5

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

1 stop8h 07m

C$ 384

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Thu 24/4

9:45 a.m.-12:39 p.m.

Nonstop5h 54m

San Francisco

Tue 29/4

1:40 p.m.-9:42 p.m.

Nonstop5h 02m

C$ 388

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Thu 29/5

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

1 stop9h 05m

San Francisco

Mon 2/6

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

1 stop17h 55m

C$ 388

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

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 Monday (22 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 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

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,848 reviews

Alaska Airlines

8.0

Very good

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Porter Airlines

8.0

Very good

280 reviews

Alaska Airlines

8.0

Very good

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,910 reviews

Alaska Airlines

8.0

Very good

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Air Transat

7.8

Good

384 reviews

Alaska Airlines

8.0

Very good

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Copa Airlines

7.6

Good

1,406 reviews

Alaska Airlines

8.0

Very good

9,848 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?
C$ 201 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Flair Airlines, with prices starting from C$ 225 and C$ 228, 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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Direct flights to United States

Find a return flight route from San Francisco Bay Area

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Top 9 airlines flying from Ontario to San Francisco Bay Area

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	CheapestC$ 277	AverageC$ 637	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
WestJet	CheapestC$ 294	AverageC$ 544	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Air Canada	CheapestC$ 338	AverageC$ 629	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Alaska Airlines	CheapestC$ 344	AverageC$ 691	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Delta	CheapestC$ 346	AverageC$ 520	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Porter Airlines	CheapestC$ 357	AverageC$ 649	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 366	AverageC$ 794	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Transat	CheapestC$ 423	AverageC$ 526	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
WestJet Encore	CheapestC$ 661	AverageC$ 719	FlexibilityNo cancel fee	On-timeN/A	Search WestJet Encore flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to San Francisco Bay Area?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco Bay Area from Ontario today with Cheapflights!

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$ 193

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.

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 10 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 10 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 10 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 10 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 10 April 2025.