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

One-way options have recently been found by users for as low as C$ 190 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 203 and Air Canada from C$ 205 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 Toronto Island - 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 for the cheapest flight from Region of Ontario to San Francisco? While on average our users pay C$ 1,577, our data indicates the cheapest price to be C$ 213. The most popular route (Toronto Pearson Intl - San Francisco), is priced around C$ 266.

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

Before booking your flight to San Francisco from Region of Ontario, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (78%), Porter Airlines (64%), Air Transat( 64%).

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

Consider American Airlines, Air Canada or Alaska Airlines when booking your flight. These represent 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?

Find a great deal and save up to 72% by booking at least 57 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Region of Ontario to San Francisco within the next two weeks, with the cheapest ticket starting at C$ 670.

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

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to San Francisco. Flights to San Francisco from Region of Ontario in February are about C$ 595 on average during February, but can be found for as low as C$ 366.

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

Located just 19.0 km from the city centre, San Francisco (SFO) is the airport most travelers will use when flying to San Francisco from Ontario.

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.

C$ 190+ Flights from Ontario to San Francisco

Cheap flight deals from Ontario to San Francisco

Round-trip from	C$ 341
One-way from	C$ 190
Popular in	July
Cheapest in	February
Average price	C$ 514
Good round-trip deal	C$ 524 or less
Good one-way deal	C$ 291 or less

WestJet
29/4-2/5
2 total stops
17h 56m total
Ontario to San Francisco

Search Deals

WestJet
2/5
2 total stops
10h 59m total
Ontario to San Francisco

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (C$ 105 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 February 2025

Search Deals

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

Search Deals

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

Search Deals

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 21 February 2025.

Tue 29/46:00 a.m.YHM - SFO

1 stop9h 05mWestJet

Fri 2/512:50 p.m.SFO - YHM

1 stop8h 51mWestJet

Deal found 20/2C$ 341

Thu 20/38:00 p.m.YYZ - SFO

1 stop14h 16mMultiple Airlines

Thu 27/38:00 p.m.SFO - YYZ

2 stops14h 55mMultiple Airlines

Deal found 20/2C$ 347

Mon 9/66:00 a.m.YKF - SFO

1 stop9h 05mWestJet

Thu 12/66:05 p.m.SFO - YKF

1 stop27h 41mWestJet

Deal found 19/2C$ 348

Tue 25/26:30 a.m.YYZ - SFO

1 stop9h 36mWestJet

Tue 4/31:55 p.m.SFO - YYZ

2 stops13h 03mWestJet

Deal found 20/2C$ 351

Thu 20/36:45 a.m.YUL - SFO

1 stop8h 54mPorter Airlines

Thu 27/31:40 p.m.SFO - YUL

1 stop7h 55mPorter Airlines

Deal found 20/2C$ 355

Tue 8/46:00 a.m.YOW - SFO

1 stop10h 55mAir Canada

Tue 15/48:30 a.m.SFO - YOW

1 stop10h 04mAir Canada

Deal found 20/2C$ 355

Thu 27/33:25 p.m.YTZ - SFO

1 stop9h 26mAir Canada

Thu 10/48:20 a.m.SFO - YTZ

1 stop10h 15mAir Canada

Deal found 18/2C$ 359

Thu 5/66:15 a.m.YOW - SFO

2 stops14h 00mWestJet

Tue 10/62:45 p.m.SFO - YOW

2 stops13h 00mWestJet

Deal found 20/2C$ 369

Thu 20/39:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Mon 24/31:40 p.m.SFO - YYZ

Nonstop5h 02mPorter Airlines

Deal found 20/2C$ 372

Sat 31/56:45 a.m.YUL - SFO

2 stops13h 30mWestJet

Fri 6/67:30 a.m.SFO - YUL

2 stops14h 07mWestJet

Deal found 20/2C$ 375

Thu 24/46:15 a.m.YOW - SFO

1 stop9h 24mPorter Airlines

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

1 stop8h 00mPorter Airlines

Deal found 20/2C$ 378

Sat 5/43:25 p.m.YXU - SFO

1 stop9h 24mAir Canada

Sat 12/410:52 p.m.SFO - YXU

1 stop7h 21mAir Canada

Deal found 19/2C$ 378

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 21 February 2025.

Tue 29/46:00 a.m.YHM - SFO

1 stop9h 05mWestJet

Fri 2/512:50 p.m.SFO - YHM

1 stop8h 51mWestJet

Deal found 20/2C$ 341

Thu 20/38:00 p.m.YYZ - SFO

1 stop14h 16mMultiple Airlines

Thu 27/38:00 p.m.SFO - YYZ

2 stops14h 55mMultiple Airlines

Deal found 20/2C$ 347

Thu 20/36:45 a.m.YUL - SFO

1 stop8h 54mPorter Airlines

Thu 27/31:40 p.m.SFO - YUL

1 stop7h 55mPorter Airlines

Deal found 20/2C$ 355

Tue 8/46:00 a.m.YOW - SFO

1 stop10h 55mAir Canada

Tue 15/48:30 a.m.SFO - YOW

1 stop10h 04mAir Canada

Deal found 20/2C$ 355

Fri 4/45:15 a.m.YOW - SFO

1 stop8h 22mUnited Airlines

Mon 7/412:08 a.m.SFO - YOW

1 stop10h 56mUnited Airlines

Deal found 18/2C$ 389

Thu 6/34:20 p.m.YYZ - SFO

1 stop10h 24mAlaska Airlines

Wed 12/32:00 p.m.SFO - YYZ

2 stops21h 55mAlaska Airlines

Deal found 20/2C$ 456

Wed 2/46:30 a.m.YYZ - SFO

2 stops12h 18mDelta

Mon 7/412:30 a.m.SFO - YYZ

1 stop10h 05mDelta

Deal found 19/2C$ 477

Fri 18/49:45 a.m.YYZ - SFO

Nonstop5h 54mAir Transat

Fri 25/41:40 p.m.SFO - YYZ

Nonstop5h 02mAir Transat

Deal found 20/2C$ 530

Sat 22/34:00 p.m.YUL - SFO

2 stops11h 16mAmerican Airlines

Sat 29/36:30 a.m.SFO - YUL

2 stops13h 15mAmerican Airlines

Deal found 20/2C$ 547

Sun 23/37:30 a.m.YUL - SFO

1 stop18h 22mBritish Airways

Mon 31/312:25 a.m.SFO - YUL

1 stop10h 05mBritish Airways

Deal found 20/2C$ 560

Thu 6/37:00 a.m.YUL - SFO

1 stop9h 47mKLM

Fri 21/310:45 p.m.SFO - YUL

1 stop10h 13mKLM

Deal found 20/2C$ 700

Tue 25/26:30 a.m.YYZ - SFO

1 stop9h 36mWestJet

Tue 4/31:55 p.m.SFO - YYZ

2 stops13h 03mWestJet

Deal found 20/2C$ 351

Direct flights from Ontario to San Francisco
Explore direct flight options from Ontario to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 21 February 2025.

Thu 1/512:20 p.m.YYZ - SFO

Nonstop5h 38mPorter Airlines

Sat 10/54:00 p.m.SFO - YYZ

Nonstop4h 59mPorter Airlines

Deal found 20/2C$ 348

Thu 24/46:55 p.m.YYZ - SFO

Nonstop5h 42mAir Canada

Sun 27/44:30 p.m.SFO - YYZ

Nonstop5h 00mAir Canada

Deal found 20/2C$ 382

Mon 21/45:25 p.m.YYZ - SFO

Nonstop5h 42mUnited Airlines

Fri 25/44:30 p.m.SFO - YYZ

Nonstop5h 00mUnited Airlines

Deal found 20/2C$ 406

Tue 11/39:45 a.m.YYZ - SFO

Nonstop5h 54mAir Transat

Tue 25/31:40 p.m.SFO - YYZ

Nonstop5h 02mAir Transat

Deal found 19/2C$ 433

Sun 6/49:45 a.m.YYZ - SFO

Nonstop5h 54mMultiple Airlines

Sun 13/44:30 p.m.SFO - YYZ

Nonstop5h 00mMultiple Airlines

Deal found 20/2C$ 460

Fri 14/36:20 p.m.YUL - SFO

Nonstop6h 31mUnited Airlines

Tue 18/38:30 a.m.SFO - YUL

Nonstop5h 28mUnited Airlines

Deal found 20/2C$ 489

Thu 13/36:20 p.m.YUL - SFO

Nonstop6h 31mAir Canada

Mon 17/38:30 a.m.SFO - YUL

Nonstop5h 28mAir Canada

Deal found 20/2C$ 513

Last-minute flights from Ontario to San Francisco
Discover last-minute flight deals from Ontario to San Francisco. Data last updated 21 February 2025 and is based on user searches.

Tue 25/26:30 a.m.YYZ - SFO

1 stop9h 36mMultiple Airlines

Mon 10/310:59 p.m.SFO - YYZ

1 stop28h 44mMultiple Airlines

Deal found 20/2C$ 348

Tue 25/26:30 a.m.YYZ - SFO

1 stop9h 36mWestJet

Tue 4/31:55 p.m.SFO - YYZ

2 stops13h 03mWestJet

Deal found 20/2C$ 351

Tue 25/22:50 p.m.YOW - SFO

2 stops34h 09mMultiple Airlines

Tue 4/33:30 p.m.SFO - YOW

2 stops13h 47mMultiple Airlines

Deal found 20/2C$ 446

Tue 25/24:20 p.m.YYZ - SFO

2 stops18h 40mAlaska Airlines

Wed 2/412:15 p.m.SFO - YYZ

2 stops23h 25mAlaska Airlines

Deal found 20/2C$ 500

Wed 26/26:00 a.m.YYZ - SFO

1 stop15h 41mDelta

Thu 6/312:40 a.m.SFO - YYZ

1 stop10h 04mDelta

Deal found 19/2C$ 526

Wed 26/26:15 p.m.YHM - SFO

1 stop21h 51mWestJet

Tue 11/31:55 p.m.SFO - YHM

1 stop24h 18mWestJet

Deal found 19/2C$ 531

Wed 26/27:45 a.m.YTZ - SFO

1 stop17h 40mMultiple Airlines

Wed 12/37:20 a.m.SFO - YTZ

1 stop10h 10mMultiple Airlines

Deal found 19/2C$ 643

Thu 27/28:00 a.m.YYZ - SFO

2 stops13h 12mFrontier

Fri 7/310:59 p.m.SFO - YYZ

2 stops21h 12mFrontier

Deal found 20/2C$ 540

Thu 27/27:30 a.m.YYZ - SFO

1 stop11h 05mAir Canada

Thu 6/34:35 p.m.SFO - YYZ

1 stop10h 34mAir Canada

Deal found 19/2C$ 588

Thu 27/26:50 a.m.YUL - SFO

2 stops16h 12mMultiple Airlines

Sun 2/31:40 p.m.SFO - YUL

1 stop7h 55mMultiple Airlines

Deal found 19/2C$ 645

Fri 28/29:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Tue 4/31:40 p.m.SFO - YYZ

Nonstop5h 02mPorter Airlines

Deal found 19/2C$ 447

Fri 28/210:30 a.m.YOW - SFO

1 stop18h 04mUnited Airlines

Sun 2/36:41 p.m.SFO - YOW

1 stop12h 50mUnited Airlines

Deal found 20/2C$ 474

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 21 February 2025.

Fri 2/56:00 a.m.YHM - SFO

2 stops10h 59mWestJet

Deal found 19/2C$ 190

Sat 5/46:15 a.m.YOW - SFO

1 stop9h 24mPorter Airlines

Deal found 19/2C$ 203

Mon 31/33:20 p.m.YXU - SFO

1 stop9h 29mAir Canada

Deal found 19/2C$ 205

Tue 8/46:00 a.m.YOW - SFO

1 stop10h 55mAir Canada

Deal found 19/2C$ 207

Tue 1/46:45 a.m.YUL - SFO

1 stop8h 54mPorter Airlines

Deal found 19/2C$ 214

Tue 25/28:00 p.m.YYZ - SFO

1 stop16h 42mMultiple Airlines

Deal found 20/2C$ 219

Tue 29/43:35 p.m.YOW - SFO

2 stops24h 10mMultiple Airlines

Deal found 18/2C$ 220

Mon 24/39:45 a.m.YYZ - SFO

Nonstop5h 54mPorter Airlines

Deal found 20/2C$ 220

Thu 6/36:30 a.m.YKF - SFO

1 stop9h 36mWestJet

Deal found 20/2C$ 222

Wed 9/44:10 p.m.YTZ - SFO

2 stops18h 35mMultiple Airlines

Deal found 19/2C$ 226

Wed 21/59:45 a.m.YYZ - SFO

Nonstop5h 38mAir Transat

Deal found 20/2C$ 227

Mon 31/33:20 p.m.YXU - SFO

1 stop9h 17mUnited Airlines

Deal found 18/2C$ 229

Find flights from Ontario to San Francisco within your budget

Fly from

Fly to

Route

Depart

Return

Price

HamiltonSan Francisco

YHM - SFO

YHMSFO

Hamilton

Thu 8/5

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

2 stops10h 59m

San Francisco

Fri 9/5

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

1 stop8h 51m

C$ 337

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 21/3

8:00 p.m.-7:42 a.m.

1 stop14h 42m

San Francisco

Mon 24/3

10:59 p.m.-9:11 p.m.

2 stops19h 12m

C$ 347

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Mon 9/6

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

1 stop9h 05m

San Francisco

Thu 12/6

6:05 p.m.-12:46 a.m.

1 stop27h 41m

C$ 348

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Thu 8/5

6:30 a.m.-12:05 p.m.

1 stop8h 35m

San Francisco

Sun 11/5

7:30 a.m.-6:54 p.m.

1 stop8h 24m

C$ 351

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 20/3

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

1 stop8h 54m

San Francisco

Thu 27/3

1:40 p.m.-12:35 a.m.

1 stop7h 55m

C$ 355

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 8/4

6:00 a.m.-1:55 p.m.

1 stop10h 55m

San Francisco

Tue 15/4

8:30 a.m.-9:34 p.m.

1 stop10h 04m

C$ 355

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Sat 26/4

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

Nonstop5h 54m

San Francisco

Thu 1/5

1:25 p.m.-9:24 p.m.

Nonstop4h 59m

C$ 359

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Thu 27/3

6:55 p.m.-9:42 p.m.

Nonstop5h 47m

San Francisco

Thu 10/4

8:20 a.m.-9:39 p.m.

1 stop10h 19m

C$ 369

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Thu 5/6

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

2 stops14h 00m

San Francisco

Tue 10/6

2:45 p.m.-6:45 a.m.

2 stops13h 00m

C$ 369

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Sat 31/5

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

2 stops13h 30m

San Francisco

Fri 6/6

7:30 a.m.-12:37 a.m.

2 stops14h 07m

C$ 375

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/2

Showing 1-10 of 60 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.

Travel insights for flights from Ontario to San Francisco

Get recent, data-driven insights about flights from Ontario to San Francisco including ideal travel times, pricing trends, and more.

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 C$ 276). Flying from Region of Ontario to San Francisco 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 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 Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in San Francisco by month

In terms of precipitation, rainfall in San Francisco 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 when rainfall is around 0.0 mm.

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 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

Read reviews from past customers who have flown Delta, Alaska Airlines and Porter Airlines from Ontario to San Francisco. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

8,220 reviews

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Alaska Airlines

8.0

Very good

9,692 reviews

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Porter Airlines

7.9

Good

276 reviews

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Transat

7.8

Good

380 reviews

Delta

8.0

Very good

8,220 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to San Francisco from Ontario?
Located just 19.0 km from the city centre, San Francisco (SFO) is the airport most travelers will use when flying to San Francisco from Ontario.
What are the cheapest airlines to fly from Region of Ontario to San Francisco one-way?
One-way options have recently been found by users for as low as C$ 190 on WestJet. Other airlines that offer cheap prices include Porter Airlines from C$ 203 and Air Canada from C$ 205 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 Toronto Island - 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?
Before booking your flight to San Francisco from Region of Ontario, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (78%), Porter Airlines (64%), Air Transat( 64%).
What are the cheapest flights from Region of Ontario to San Francisco?
Looking for the cheapest flight from Region of Ontario to San Francisco? While on average our users pay C$ 1,577, our data indicates the cheapest price to be C$ 213. The most popular route (Toronto Pearson Intl - San Francisco), is priced around C$ 266.
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 C$ 276). Flying from Region of Ontario to San Francisco 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

Richmond

San Ramon

Newark

Alameda

Novato

Burlingame

Redwood City

South San Francisco

San Bruno

Scotts Valley

Belmont

Millbrae

Santa Clara

Vallejo

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Lynx Air	CheapestC$ 284	AverageC$ 341	FlexibilityNo cancel fee	On-timeN/A	Search Lynx Air flights
Air Canada	CheapestC$ 338	AverageC$ 658	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Delta	CheapestC$ 347	AverageC$ 535	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
WestJet	CheapestC$ 347	AverageC$ 597	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Porter Airlines	CheapestC$ 379	AverageC$ 686	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
United Airlines	CheapestC$ 403	AverageC$ 690	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	CheapestC$ 408	AverageC$ 683	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Alaska Airlines	CheapestC$ 434	AverageC$ 683	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Air Transat	CheapestC$ 493	AverageC$ 528	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
WestJet Encore	CheapestC$ 662	AverageC$ 728	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?

Cheapflights helps you search for flights from Ontario to San Francisco via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to San Francisco from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to San Francisco, users can toggle the no change fees filter when performing a flight search.

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

Yes! Start tracking prices for Ontario to San Francisco 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 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 2/5. 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

Keep the following information in mind while searching for Ontario to San Francisco flight deals. Data was last updated 21 February 2025.

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 21 February 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 21 February 2025.

Find flights from Ontario to San Francisco within your budget

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.

Travel insights for flights from Ontario to San Francisco

Get recent, data-driven insights about flights from Ontario to San Francisco including ideal travel times, pricing trends, and more.

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 21 February 2025.

Weekly flight availability from Region of Ontario to San Francisco

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

Read reviews from past customers who have flown Delta, Alaska Airlines and Porter Airlines from Ontario to San Francisco. 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. 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?

Travelling to a place near Ontario?

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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 10 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 21 February 2025.