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

To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $162. Flair Airlines flights start at $167 while deals on Air Canada start at $174 one-way.

What are the most popular routes from Region of Ontario to San Francisco?

While some choose either Montreal Pierre Elliott Trudeau Intl - San Francisco or Hamilton - San Francisco, Toronto Pearson Intl - San Francisco is the most popular route from Region of Ontario to San Francisco.

What are the cheapest flights from Region of Ontario to San Francisco?

Looking at all options, your cheapest flight can be booked for $169. While the most popular route (Toronto Pearson Intl - San Francisco) can be booked for $265 on average our data indicates $949 when flying from Region of Ontario to San Francisco.

What are the most reliable airlines from Region of Ontario to San Francisco?

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 Region of Ontario to San Francisco on time: Porter Airlines (79%), Air Transat (79%), Air Canada (65%).

What are the most popular airlines that fly from Region of Ontario to San Francisco?

American Airlines, Air Canada and Delta are the most popular airlines when flying from Region of Ontario to San Francisco.

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

To save up to 72% on this flight, we recommend booking at least 47 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to San Francisco from $427 1-2 weeks out and tickets from $701 for flights departing within the next 72 hours.

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

Flights from Region of Ontario to San Francisco lean towards being more expensive in December. Prices are generally better when you fly from Region of Ontario to San Francisco in March, with the cheapest ticket starting at $243.

What airport do you fly into for flights to San Francisco from Ontario?

If you book a flight to San Francisco from Ontario, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.

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

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

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

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.

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

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

$162+ Flights from Ontario to San Francisco

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Cheap flight deals from Ontario to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$262 (Mytrip)
One-way from	$162 (FlightHub)
Popular in	December
Cheapest in	March
Average price	$374
Good round-trip deal	$323 or less
Good one-way deal	$200 or less

Provider with most accurate pricing for Toronto (YTO)-San Francisco flight deals.

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Provider most trusted by Cheapflights users for Toronto (YTO)-San Francisco flights.

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From Ontario to San Francisco

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One-way flight from Ontario to San Francisco

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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in May 2025

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Price to beat on a round-trip flight from Ontario to San Francisco.

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Price to beat on a one-way flight from Ontario to San Francisco.

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Find flight deals from Ontario to San Francisco

Cheapest flights from Ontario to San Francisco
Explore the most affordable flight options available from Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

Wed 8/136:00 amYKF - SFO

1 stop8h 56mWestJet

Wed 8/2712:50 pmSFO - YKF

1 stop8h 56mWestJet

Deal found 4/30

$267

Sat 8/96:30 amYYZ - SFO

1 stop10h 29mWestJet

Sat 8/1612:50 pmSFO - YYZ

1 stop8h 34mWestJet

Deal found 4/29

$273

Wed 6/119:45 amYYZ - SFO

1 stop14h 36mMultiple Airlines

Wed 6/187:00 amSFO - YYZ

2 stops12h 54mMultiple Airlines

Deal found 4/30

$276

Wed 7/166:00 amYHM - SFO

1 stop9h 05mWestJet

Wed 7/2312:50 pmSFO - YHM

1 stop8h 51mWestJet

Deal found 4/30

$284

Thu 7/105:45 amYOW - SFO

1 stop11h 14mWestJet

Tue 7/156:05 pmSFO - YOW

1 stop9h 40mWestJet

Deal found 4/29

$292

Thu 7/176:45 amYUL - SFO

2 stops13h 30mWestJet

Thu 7/2412:50 pmSFO - YUL

1 stop8h 53mWestJet

Deal found 4/30

$303

Wed 5/148:00 pmYXU - SFO

1 stop19h 05mWestJet

Wed 5/212:45 pmSFO - YXU

2 stops11h 29mWestJet

Deal found 4/30

$326

Sun 6/158:30 amYYZ - SFO

Nonstop5h 42mAir Canada

Sun 6/2210:55 pmSFO - YYZ

Nonstop4h 54mAir Canada

Deal found 4/30

$339

Wed 6/43:45 pmYOW - SFO

1 stop8h 40mMultiple Airlines

Wed 6/187:00 amSFO - YOW

2 stops24h 21mMultiple Airlines

Deal found 4/29

$344

Thu 9/48:30 amYUL - SFO

1 stop9h 58mAir Canada

Thu 9/1811:50 amSFO - YUL

Nonstop5h 25mAir Canada

Deal found 4/30

$344

Thu 6/56:00 amYKF - SFO

1 stop9h 05mMultiple Airlines

Wed 6/1110:15 amSFO - YKF

2 stops16h 15mMultiple Airlines

Deal found 4/30

$346

Tue 6/38:20 amYHM - SFO

2 stops16h 05mMultiple Airlines

Thu 6/57:30 amSFO - YHM

2 stops33h 29mMultiple Airlines

Deal found 4/30

$346

Best flights from Ontario to San Francisco
Discover carefully curated flight deals from Ontario to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 1, 2025.

Tue 5/2710:25 pmYYZ - SFO

1 stop14h 05mMultiple Airlines

Tue 6/310:15 amSFO - YYZ

1 stop16h 59mMultiple Airlines

Deal found 4/29

$262

Wed 7/26:00 amYKF - SFO

1 stop9h 05mWestJet

Thu 8/147:30 amSFO - YKF

1 stop8h 26mWestJet

Deal found 4/29

$263

Fri 6/139:45 amYYZ - SFO

Nonstop5h 45mPorter Airlines

Fri 6/201:30 pmSFO - YYZ

Nonstop4h 59mPorter Airlines

Deal found 4/30

$330

Thu 9/48:30 amYUL - SFO

1 stop9h 58mAir Canada

Thu 9/1811:50 amSFO - YUL

Nonstop5h 25mAir Canada

Deal found 4/30

$344

Fri 5/99:25 amYKF - SFO

1 stop27h 05mFlair Airlines

Mon 5/1210:15 amSFO - YKF

1 stop17h 55mFlair Airlines

Deal found 4/30

$355

Sat 6/76:30 amYYZ - SFO

Nonstop5h 37mUnited Airlines

Mon 7/212:05 pmSFO - YYZ

Nonstop4h 54mUnited Airlines

Deal found 4/29

$357

Sun 5/256:15 amYUL - SFO

1 stop8h 15mDelta

Tue 6/35:50 amSFO - YUL

1 stop7h 25mDelta

Deal found 4/30

$363

Wed 5/285:20 pmYYZ - SFO

1 stop8h 13mAmerican Airlines

Sat 5/3112:21 amSFO - YYZ

1 stop7h 44mAmerican Airlines

Deal found 4/30

$386

Wed 7/1612:00 pmYYZ - SFO

2 stops12h 25mWestJet

Sun 7/202:45 pmSFO - YYZ

2 stops12h 27mWestJet

Deal found 4/28

$268

Tue 7/296:00 amYHM - SFO

1 stop9h 05mWestJet

Tue 8/1212:50 pmSFO - YHM

1 stop8h 51mWestJet

Deal found 4/29

$278

Thu 6/58:20 amYHM - SFO

1 stop28h 10mMultiple Airlines

Tue 6/1010:15 amSFO - YHM

2 stops29h 03mMultiple Airlines

Deal found 4/29

$344

Thu 6/126:15 amYYZ - SFO

1 stop9h 10mAir Canada

Tue 6/178:35 amSFO - YYZ

Nonstop5h 00mAir Canada

Deal found 4/30

$347

Last-minute flights from Ontario to San Francisco
Discover last-minute flight deals from Ontario to San Francisco. Data last updated May 1, 2025 and is based on user searches.

Tue 5/66:00 amYKF - SFO

1 stop9h 05mWestJet

Tue 5/1312:50 pmSFO - YKF

1 stop8h 56mWestJet

Deal found 4/28

$500

Wed 5/74:25 pmYOW - SFO

1 stop23h 50mMultiple Airlines

Wed 5/1410:15 amSFO - YOW

2 stops27h 05mMultiple Airlines

Deal found 4/30

$479

Thu 5/87:55 amYYZ - SFO

1 stop14h 07mMultiple Airlines

Wed 5/1410:15 amSFO - YYZ

1 stop11h 29mMultiple Airlines

Deal found 4/30

$370

Thu 5/86:30 amYYZ - SFO

1 stop8h 35mWestJet

Wed 5/1412:50 pmSFO - YYZ

1 stop8h 36mWestJet

Deal found 4/29

$419

Thu 5/84:45 pmYYZ - SFO

2 stops18h 17mAlaska Airlines

Tue 5/133:24 pmSFO - YYZ

2 stops20h 36mAlaska Airlines

Deal found 4/30

$420

Thu 5/89:45 amYTZ - SFO

1 stop12h 17mMultiple Airlines

Tue 5/136:00 amSFO - YTZ

1 stop12h 20mMultiple Airlines

Deal found 4/29

$490

Fri 5/99:25 amYKF - SFO

1 stop27h 05mFlair Airlines

Mon 5/1210:15 amSFO - YKF

1 stop17h 55mFlair Airlines

Deal found 4/30

$355

Fri 5/910:10 amYYZ - SFO

1 stop26h 20mFlair Airlines

Mon 5/1210:15 amSFO - YYZ

2 stops30h 25mFlair Airlines

Deal found 4/30

$392

Fri 5/99:25 amYKF - SFO

1 stop27h 05mMultiple Airlines

Mon 5/1212:50 pmSFO - YKF

2 stops13h 40mMultiple Airlines

Deal found 4/28

$409

Fri 5/96:45 amYUL - SFO

2 stops28h 35mMultiple Airlines

Wed 5/2110:15 amSFO - YUL

1 stop27h 29mMultiple Airlines

Deal found 4/30

$446

Sat 5/106:45 amYUL - SFO

2 stops17h 40mWestJet

Wed 7/92:45 pmSFO - YUL

1 stop13h 23mWestJet

Deal found 4/30

$422

Sat 5/107:30 amYUL - SFO

1 stop10h 37mAir Canada

Wed 7/98:30 amSFO - YUL

Nonstop5h 25mAir Canada

Deal found 4/30

$451

One-way flights from Ontario to San Francisco
Search for one-way flight options from Ontario to San Francisco. Find affordable one-way fares based on user searches. Data last updated May 1, 2025.

Sun 8/176:00 amYHM - SFO

2 stops10h 59mWestJet

Deal found 4/30

$162

Wed 7/3012:20 pmYOW - SFO

2 stops12h 05mWestJet

Deal found 4/30

$162

Sat 6/76:00 amYKF - SFO

1 stop9h 05mWestJet

Deal found 4/30

$165

Wed 7/28:00 amYYZ - SFO

2 stops12h 15mWestJet

Deal found 4/30

$165

Thu 6/51:55 pmYYZ - SFO

1 stop22h 35mFlair Airlines

Deal found 4/30

$167

Tue 6/38:05 pmYYZ - SFO

1 stop28h 16mMultiple Airlines

Deal found 4/30

$170

Sat 6/146:15 amYXU - SFO

1 stop7h 57mAir Canada

Deal found 4/30

$174

Wed 5/287:00 amYTZ - SFO

2 stops17h 19mMultiple Airlines

Deal found 4/30

$176

Fri 7/116:45 amYUL - SFO

2 stops11h 03mWestJet

Deal found 4/29

$180

Tue 8/127:00 amYUL - SFO

2 stops15h 44mMultiple Airlines

Deal found 4/30

$185

Sat 6/143:25 pmYTZ - SFO

1 stop9h 17mAir Canada

Deal found 4/30

$187

Wed 7/236:45 amYUL - SFO

1 stop8h 38mPorter Airlines

Deal found 4/30

$187

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Wed 8/13

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Wed 8/27

12:50 pm-12:46 am

1 stop8h 56m

$267

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Sat 8/9

6:30 am-1:59 pm

1 stop10h 29m

San Francisco

Sat 8/16

12:50 pm-12:24 am

1 stop8h 34m

$273

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Wed 6/11

9:45 am-9:21 pm

1 stop14h 36m

San Francisco

Wed 6/18

7:00 am-10:54 pm

2 stops12h 54m

$276

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Wed 7/16

6:00 am-12:05 pm

1 stop9h 05m

San Francisco

Wed 7/23

12:50 pm-12:41 am

1 stop8h 51m

$284

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 7/10

5:45 am-1:59 pm

1 stop11h 14m

San Francisco

Tue 7/15

6:05 pm-6:45 am

1 stop9h 40m

$292

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 7/17

6:45 am-5:15 pm

2 stops13h 30m

San Francisco

Thu 7/24

12:50 pm-12:43 am

1 stop8h 53m

$303

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 5/14

8:00 pm-12:05 pm

1 stop19h 05m

San Francisco

Wed 5/21

2:45 pm-5:14 am

2 stops11h 29m

$326

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Sun 6/15

8:30 am-11:12 am

Nonstop5h 42m

San Francisco

Sun 6/22

10:55 pm-6:49 am

Nonstop4h 54m

$339

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 6/4

3:45 pm-9:25 pm

1 stop8h 40m

San Francisco

Wed 6/18

7:00 am-10:21 am

2 stops24h 21m

$344

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

8:30 am-3:28 pm

1 stop9h 58m

San Francisco

Thu 9/18

11:50 am-8:15 pm

Nonstop5h 25m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 58 results

...

Best time to book a flight from Ontario to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco 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

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

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco (average of $276). Flying from Region of Ontario to San Francisco in June is currently the most expensive (average of $384). 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 SFO?

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

Weekly flight availability from Region of Ontario to San Francisco

The most flights from CAON to SFO are scheduled on a Wednesday (22 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 by month

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

If weather is an important factor for your trip to San Francisco, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta from Ontario to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,968 reviews

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

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

9,968 reviews

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

7,934 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

9,968 reviews

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

9,968 reviews

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 airport do you fly into for flights to San Francisco from Ontario?
If you book a flight to San Francisco from Ontario, you will be flying to San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco.
What are the cheapest airlines to fly from Region of Ontario to San Francisco one-way?
To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $162. Flair Airlines flights start at $167 while deals on Air Canada start at $174 one-way.
What are the most popular routes from Region of Ontario to San Francisco?
While some choose either Montreal Pierre Elliott Trudeau Intl - San Francisco or Hamilton - San Francisco, Toronto Pearson Intl - San Francisco is the most popular route from Region of Ontario to San Francisco.
What are the most reliable airlines from Region of Ontario to San Francisco?
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 Region of Ontario to San Francisco on time: Porter Airlines (79%), Air Transat (79%), Air Canada (65%).
What are the cheapest flights from Region of Ontario to San Francisco?
Looking at all options, your cheapest flight can be booked for $169. While the most popular route (Toronto Pearson Intl - San Francisco) can be booked for $265 on average our data indicates $949 when flying from Region of Ontario to San Francisco.
Can I find deals for flights from Ontario to San Francisco that include hotel bookings?
Yes. In addition to deals on Ontario to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to San Francisco?
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.
Can I find deals for business class flights from Ontario to San Francisco?
Yes. Cheapflights offers flight deals from Ontario to San Francisco 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?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco (average of $276). Flying from Region of Ontario to San Francisco in June is currently the most expensive (average of $384). 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

Roseville

Mountain View

Santa Cruz

Livermore

South San Francisco

Turlock

Manteca

Fairfield

Richmond

Watsonville

Hollister

Newark

Milpitas

Antioch

Sausalito

Hayward

Alameda

Sunnyvale

Campbell

Daly City

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Ontario to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
WestJet	Cheapest$174	Average$347	FlexibilityNo cancel fee	On-time60%
Porter Airlines	Cheapest$239	Average$436	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$241	Average$530	FlexibilityNo cancel fee	On-time69%
Air Transat	Cheapest$265	Average$374	FlexibilityNo cancel fee	On-time50%
Air Canada	Cheapest$266	Average$477	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$288	Average$475	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$308	Average$466	FlexibilityNo cancel fee	On-timeN/A

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$162+ Cheap flights from Ontario to San Francisco (SFO)

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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to San Francisco with Cheapflights

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Cheap flight deals from Ontario to San Francisco

Keep the following information in mind while searching for Ontario to San Francisco flight deals. Data was last updated May 1, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to San Francisco

Cheapest flights from Ontario to San FranciscoExplore the most affordable flight options available from Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

Explore the most affordable flight options available from Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Ontario to San Francisco

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Ontario to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

Weekly flight availability from Region of Ontario to San Francisco

Explore weekly flight availability from Ontario to San Francisco. 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 May 1, 2025.

Rainfall in San Francisco by month

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

Temperature in San Francisco by month

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

Reviews of airlines servicing San Francisco

See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta from Ontario to San Francisco have to say. You can also see how each airline compares in terms of 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. 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 into for flights to San Francisco from Ontario?

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

What are the most popular routes from Region of Ontario to San Francisco?

What are the most reliable airlines from Region of Ontario to San Francisco?

What are the cheapest flights from Region of Ontario to San Francisco?

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

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

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

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

Traveling to a place near Ontario?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to San Francisco

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

Top 7 airlines flying from Ontario to San Francisco

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Cheapest flights from Ontario to San Francisco
Explore the most affordable flight options available from Ontario to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.