How long is the flight from San Francisco to Region of Ontario?

Airlines like WestJet, Alaska Airlines, and Air Canada fly from San Francisco to Region of Ontario in about 10h 10m. The time it takes to get you to your destination can typically vary by up to 17h 25m. There are 2264 mi between San Francisco and Region of Ontario. This flight may include one or multiple stops.

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

To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $104. Flair Airlines flights start at $104 while deals on Porter Airlines start at $114 one-way.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

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

Most travelers choose San Francisco - Toronto Pearson Intl, San Francisco - Montreal Pierre Elliott Trudeau Intl or San Francisco - Toronto Island when deciding on the best route from San Francisco to Region of Ontario.

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

Looking for the cheapest flight from San Francisco to Region of Ontario? While on average our users pay $1,251, our data indicates the cheapest price to be $158. The most popular route (San Francisco - Toronto Pearson Intl), is priced around $233.

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

Before booking your flight to Region of Ontario from San Francisco, check out the most reliable airlines to get you to your destination on time: Brussels Airlines (100%), United Airlines (88%), Air Canada( 88%).

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

Before booking your flight from San Francisco to Region of Ontario check out the most popular airlines for this route: Air Canada, Porter Airlines or United Airlines.

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

Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Ontario. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

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

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

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

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

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

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

$88+ Flights from San Francisco to Ontario

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Cheap flight deals from San Francisco to Ontario

Cheapest flights from San Francisco to Ontario
Explore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

mar. 12/166:00 amSFO - YYZ

2 stops34h 36mMultiple Airlines

jue. 1/159:45 amYYZ - SFO

Nonstop5h 53mMultiple Airlines

Deal found 12/10

$385

dom. 12/148:43 amSFO - YYZ

1 stop8h 12mMultiple Airlines

lun. 1/510:15 pmYYZ - SFO

2 stops40h 39mMultiple Airlines

Deal found 12/11

$422

mié. 12/176:00 amSFO - YYZ

1 stop10h 55mMultiple Airlines

mar. 1/68:30 pmYYZ - SFO

2 stops29h 29mMultiple Airlines

Deal found 12/10

$427

mié. 12/2411:20 pmSFO - YYZ

2 stops15h 38mMultiple Airlines

lun. 1/127:55 pmYYZ - SFO

1 stop15h 52mMultiple Airlines

Deal found 12/10

$453

jue. 12/251:40 pmSFO - YYZ

Nonstop4h 59mMultiple Airlines

lun. 1/127:55 pmYYZ - SFO

1 stop28h 50mMultiple Airlines

Deal found 12/10

$456

mié. 12/176:00 amSFO - YYZ

1 stop10h 55mMultiple Airlines

lun. 1/510:50 amYYZ - SFO

1 stop29h 03mMultiple Airlines

Deal found 12/10

$457

jue. 12/251:40 pmSFO - YYZ

Nonstop4h 59mMultiple Airlines

mié. 1/71:30 pmYYZ - SFO

2 stops21h 23mMultiple Airlines

Deal found 12/10

$460

mié. 12/319:30 pmSFO - YYZ

1 stop9h 06mUnited Airlines

mié. 1/72:45 pmYYZ - SFO

1 stop11h 12mUnited Airlines

Deal found 12/10

$464

vie. 12/128:43 amSFO - YYZ

1 stop8h 49mMultiple Airlines

mar. 1/69:35 amYYZ - SFO

2 stops29h 19mMultiple Airlines

Deal found 12/9

$466

vie. 12/261:40 pmSFO - YYZ

Nonstop4h 59mMultiple Airlines

lun. 1/127:55 pmYYZ - SFO

1 stop28h 50mMultiple Airlines

Deal found 12/10

$468

vie. 12/261:40 pmSFO - YYZ

Nonstop4h 59mMultiple Airlines

mié. 1/71:30 pmYYZ - SFO

2 stops21h 23mMultiple Airlines

Deal found 12/10

$472

mar. 12/301:40 pmSFO - YOW

1 stop8h 01mMultiple Airlines

jue. 1/156:00 amYOW - SFO

1 stop9h 12mMultiple Airlines

Deal found 12/10

$537

Best flights from San Francisco to Ontario
Discover carefully curated flight deals from San Francisco to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 12, 2025.

jue. 1/221:00 pmSFO - YHM

1 stop21h 22mWestJet

mar. 1/275:45 amYHM - SFO

1 stop9h 27mWestJet

Deal found 12/10

$283

mié. 1/142:24 pmSFO - YHM

2 stops23h 53mMultiple Airlines

mar. 1/205:45 amYHM - SFO

1 stop9h 27mMultiple Airlines

Deal found 12/11

$335

vie. 1/309:00 amSFO - YYZ

1 stop27h 35mAlaska Airlines

dom. 2/14:45 pmYYZ - SFO

1 stop28h 14mAlaska Airlines

Deal found 12/10

$353

lun. 1/261:40 pmSFO - YOW

1 stop8h 03mPorter Airlines

sáb. 2/76:45 amYOW - SFO

1 stop8h 55mPorter Airlines

Deal found 12/11

$378

mié. 1/1410:35 amSFO - YYZ

2 stops9h 06mDelta

dom. 1/186:00 amYYZ - SFO

2 stops10h 38mDelta

Deal found 12/11

$401

mié. 1/218:25 amSFO - YTZ

1 stop10h 10mAir Canada

lun. 1/263:30 pmYTZ - SFO

1 stop8h 52mAir Canada

Deal found 12/9

$404

dom. 1/258:49 amSFO - YXU

1 stop9h 31mUnited Airlines

dom. 2/19:25 amYXU - SFO

2 stops19h 05mUnited Airlines

Deal found 12/11

$519

jue. 1/81:00 pmSFO - YHM

1 stop21h 22mWestJet

mar. 1/135:45 amYHM - SFO

1 stop9h 27mWestJet

Deal found 12/9

$283

jue. 1/221:00 pmSFO - YHM

1 stop21h 22mWestJet

jue. 1/296:10 pmYHM - SFO

1 stop21h 02mWestJet

Deal found 12/11

$293

mar. 1/131:40 pmSFO - YOW

1 stop8h 03mMultiple Airlines

mar. 1/206:00 amYOW - SFO

1 stop9h 12mMultiple Airlines

Deal found 12/11

$343

lun. 3/98:47 pmSFO - YYZ

1 stop15h 48mAlaska Airlines

jue. 3/194:45 pmYYZ - SFO

1 stop8h 25mAlaska Airlines

Deal found 12/10

$353

jue. 2/51:00 pmSFO - YHM

1 stop21h 21mWestJet

lun. 2/96:10 pmYHM - SFO

1 stop21h 00mWestJet

Deal found 12/10

$295

jue. 1/85:44 pmSFO - YOW

2 stops20h 29mMultiple Airlines

jue. 1/156:00 amYOW - SFO

1 stop9h 12mMultiple Airlines

Deal found 12/11

$350

dom. 1/251:00 pmSFO - YOW

1 stop8h 40mWestJet

jue. 1/296:00 amYOW - SFO

1 stop9h 12mWestJet

Deal found 12/11

$297

jue. 2/198:47 pmSFO - YYZ

1 stop15h 48mAlaska Airlines

lun. 2/234:45 pmYYZ - SFO

1 stop26h 03mAlaska Airlines

Deal found 12/10

$364

mié. 1/217:00 pmSFO - YYZ

2 stops11h 04mDelta

sáb. 1/317:45 amYYZ - SFO

2 stops13h 04mDelta

Deal found 12/11

$401

vie. 1/98:25 amSFO - YTZ

1 stop8h 30mAir Canada

sáb. 1/103:30 pmYTZ - SFO

1 stop8h 52mAir Canada

Deal found 12/11

$404

mié. 1/141:40 pmSFO - YYZ

Nonstop4h 57mMultiple Airlines

lun. 1/191:30 pmYYZ - SFO

1 stop25h 42mMultiple Airlines

Deal found 12/11

$356

lun. 1/126:30 pmSFO - YYZ

2 stops11h 34mDelta

sáb. 1/176:30 amYYZ - SFO

2 stops14h 19mDelta

Deal found 12/10

$401

sáb. 1/108:25 amSFO - YTZ

1 stop8h 30mAir Canada

mar. 1/133:30 pmYTZ - SFO

1 stop8h 52mAir Canada

Deal found 12/11

$404

jue. 2/51:00 pmSFO - YHM

1 stop21h 21mWestJet

dom. 2/86:10 pmYHM - SFO

1 stop21h 00mWestJet

Deal found 12/10

$307

mié. 1/144:46 pmSFO - YYZ

1 stop19h 49mAlaska Airlines

dom. 1/184:45 pmYYZ - SFO

1 stop9h 18mAlaska Airlines

Deal found 12/10

$375

vie. 3/131:00 pmSFO - YUL

1 stop15h 05mMultiple Airlines

lun. 3/166:45 amYUL - SFO

1 stop8h 55mMultiple Airlines

Deal found 12/11

$358

sáb. 1/106:30 pmSFO - YYZ

2 stops11h 34mDelta

mar. 1/1310:05 amYYZ - SFO

2 stops10h 44mDelta

Deal found 12/11

$401

sáb. 1/248:25 amSFO - YTZ

1 stop8h 30mAir Canada

lun. 1/263:30 pmYTZ - SFO

1 stop8h 52mAir Canada

Deal found 12/10

$404

vie. 1/161:00 pmSFO - YOW

1 stop8h 40mWestJet

jue. 1/226:00 amYOW - SFO

1 stop9h 12mWestJet

Deal found 12/10

$311

vie. 2/137:28 pmSFO - YYZ

1 stop17h 07mAlaska Airlines

mar. 2/174:45 pmYYZ - SFO

1 stop20h 52mAlaska Airlines

Deal found 12/10

$377

mié. 1/142:24 pmSFO - YOW

2 stops23h 49mMultiple Airlines

sáb. 1/245:40 amYOW - SFO

1 stop9h 58mMultiple Airlines

Deal found 12/11

$364

jue. 1/88:25 amSFO - YTZ

1 stop8h 30mAir Canada

mar. 1/203:30 pmYTZ - SFO

1 stop8h 52mAir Canada

Deal found 12/10

$404

jue. 1/151:00 pmSFO - YHM

1 stop21h 22mWestJet

lun. 1/196:10 pmYHM - SFO

1 stop21h 02mWestJet

Deal found 12/9

$314

Last-minute flights from San Francisco to Ontario
Discover last-minute flight deals from San Francisco to Ontario. Data last updated diciembre 12, 2025 and is based on user searches.

mar. 1/610:45 pmSFO - YYZ

2 stops17h 51mMultiple Airlines

vie. 1/99:45 amYYZ - SFO

Nonstop5h 53mMultiple Airlines

Deal found 12/11

$315

mié. 1/71:40 pmSFO - YYZ

Nonstop4h 57mMultiple Airlines

dom. 1/111:30 pmYYZ - SFO

2 stops35h 25mMultiple Airlines

Deal found 12/10

$317

jue. 1/81:00 pmSFO - YHM

1 stop21h 22mWestJet

mar. 1/135:45 amYHM - SFO

1 stop9h 27mWestJet

Deal found 12/11

$307

dom. 1/111:00 pmSFO - YHM

1 stop25h 17mWestJet

mar. 1/135:45 amYHM - SFO

1 stop9h 27mWestJet

Deal found 12/10

$298

mié. 1/141:40 pmSFO - YYZ

Nonstop4h 57mMultiple Airlines

mar. 1/201:30 pmYYZ - SFO

2 stops22h 19mMultiple Airlines

Deal found 12/9

$318

jue. 1/151:00 pmSFO - YHM

1 stop21h 22mWestJet

mar. 1/205:45 amYHM - SFO

1 stop9h 27mWestJet

Deal found 12/9

$287

jue. 1/151:00 pmSFO - YHM

1 stop21h 22mWestJet

lun. 1/196:10 pmYHM - SFO

1 stop21h 02mWestJet

Deal found 12/9

$314

vie. 1/161:00 pmSFO - YOW

1 stop8h 40mWestJet

jue. 1/226:00 amYOW - SFO

1 stop9h 12mWestJet

Deal found 12/10

$297

vie. 1/161:00 pmSFO - YYZ

2 stops13h 58mMultiple Airlines

jue. 1/224:45 pmYYZ - SFO

1 stop9h 18mMultiple Airlines

Deal found 12/11

$312

mié. 1/211:40 pmSFO - YYZ

Nonstop4h 57mMultiple Airlines

lun. 1/2610:15 pmYYZ - SFO

1 stop16h 57mMultiple Airlines

Deal found 12/9

$316

jue. 1/221:00 pmSFO - YHM

1 stop21h 22mWestJet

lun. 1/266:10 pmYHM - SFO

1 stop21h 02mWestJet

Deal found 12/9

$283

jue. 1/221:00 pmSFO - YHM

1 stop21h 22mWestJet

jue. 1/296:10 pmYHM - SFO

1 stop21h 02mWestJet

Deal found 12/11

$293

One-way flights from San Francisco to Ontario
Search for one-way flight options from San Francisco to Ontario. Find affordable one-way fares based on user searches. Data last updated diciembre 12, 2025.

sáb. 2/710:15 amSFO - YHM

1 stop10h 20mMultiple Airlines

Deal found 12/11

$88

jue. 2/510:15 amSFO - YHM

1 stop10h 20mMultiple Airlines

Deal found 12/10

$114

dom. 2/810:15 amSFO - YUL

2 stops17h 50mMultiple Airlines

Deal found 12/10

$132

dom. 1/2510:15 amSFO - YOW

3 stops29h 06mMultiple Airlines

Deal found 12/11

$134

dom. 1/111:00 pmSFO - YHM

1 stop25h 17mWestJet

Deal found 12/11

$140

dom. 1/251:00 pmSFO - YHM

1 stop25h 17mWestJet

Deal found 12/11

$141

mié. 1/212:25 pmSFO - YOW

2 stops21h 20mMultiple Airlines

Deal found 12/11

$148

sáb. 1/2410:15 amSFO - YUL

2 stops35h 28mMultiple Airlines

Deal found 12/10

$150

dom. 1/119:48 pmSFO - YOW

3 stops23h 54mMultiple Airlines

Deal found 12/11

$150

vie. 2/61:00 pmSFO - YUL

1 stop15h 05mWestJet

Deal found 12/10

$151

sáb. 2/710:15 amSFO - YUL

1 stop27h 12mMultiple Airlines

Deal found 12/10

$153

dom. 1/1810:15 amSFO - YOW

1 stop25h 30mMultiple Airlines

Deal found 12/11

$154

Find flight deals from San Francisco to Ontario

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$283 (oojo)
One-way from	$88 (Trip.com)
Popular in	December
Cheapest in	February
Average price	$644
Good round-trip deal	$544 or less
Good one-way deal	$310 or less

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

Search Deals

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

Search Deals

From San Francisco to Ontario

Search Deals

One-way flight from San Francisco to Ontario

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($67 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 1/22

1:00 pm-1:22 pm

1 stop21h 22m

Hamilton

mar. 1/27

5:45 am-12:12 pm

1 stop9h 27m

$283

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 1/8

1:00 pm-1:22 pm

1 stop21h 22m

Hamilton

mar. 1/13

5:45 am-12:12 pm

1 stop9h 27m

$283

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 1/22

1:00 pm-1:22 pm

1 stop21h 22m

Hamilton

jue. 1/29

6:10 pm-12:12 pm

1 stop21h 02m

$293

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 2/5

1:00 pm-1:21 pm

1 stop21h 21m

Hamilton

lun. 2/9

6:10 pm-12:10 pm

1 stop21h 00m

$295

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

dom. 1/25

1:00 pm-12:40 am

1 stop8h 40m

Ottawa

jue. 1/29

6:00 am-12:12 pm

1 stop9h 12m

$297

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 2/5

1:00 pm-1:21 pm

1 stop21h 21m

Hamilton

dom. 2/8

6:10 pm-12:10 pm

1 stop21h 00m

$307

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

vie. 1/16

1:00 pm-12:40 am

1 stop8h 40m

Ottawa

jue. 1/22

6:00 am-12:12 pm

1 stop9h 12m

$311

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

jue. 1/15

1:00 pm-1:22 pm

1 stop21h 22m

Hamilton

lun. 1/19

6:10 pm-12:12 pm

1 stop21h 02m

$314

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

mié. 1/14

2:24 pm-5:17 pm

2 stops23h 53m

Hamilton

mar. 1/20

5:45 am-12:12 pm

1 stop9h 27m

$335

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

mar. 1/13

1:40 pm-12:43 am

1 stop8h 03m

Ottawa

mar. 1/20

6:00 am-12:12 pm

1 stop9h 12m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 60 results

...

Best time to book a flight from San Francisco to Ontario

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

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of $127). Flying from San Francisco to Region of Ontario in August is currently the most expensive (average of $202). 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 SFO to ON?

One of the essential ways to save on airfare from San Francisco to Region of Ontario is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 40% on airfare.

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

Travelers seeking maximum savings on their San Francisco to Region of Ontario flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to Region of Ontario

The most flights from SFO to CAON are scheduled on a Friday (23 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United Airlines from San Francisco to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Porter Airlines

8.0

Very good

398 reviews

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Air Transat

7.8

Good

480 reviews

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

United Airlines

7.4

Good

9,093 reviews

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

WestJet

7.2

Good

3,195 reviews

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Air Canada

7.1

Good

10,517 reviews

Porter Airlines

8.0

Very good

398 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

What airport do you fly from for flights from San Francisco to Ontario?
Most people fly from San Francisco (SFO) if they book a flight from San Francisco to Ontario. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.
How long is the flight from San Francisco to Region of Ontario?
Airlines like WestJet, Alaska Airlines, and Air Canada fly from San Francisco to Region of Ontario in about 10h 10m. The time it takes to get you to your destination can typically vary by up to 17h 25m. There are 2264 mi between San Francisco and Region of Ontario. This flight may include one or multiple stops.
What are the cheapest airlines to fly from San Francisco to Region of Ontario one-way?
To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $104. Flair Airlines flights start at $104 while deals on Porter Airlines start at $114 one-way.
What are the most popular routes from San Francisco to Region of Ontario?
Most travelers choose San Francisco - Toronto Pearson Intl, San Francisco - Montreal Pierre Elliott Trudeau Intl or San Francisco - Toronto Island when deciding on the best route from San Francisco to Region of Ontario.
What are the most reliable airlines from San Francisco to Region of Ontario?
Before booking your flight to Region of Ontario from San Francisco, check out the most reliable airlines to get you to your destination on time: Brussels Airlines (100%), United Airlines (88%), Air Canada( 88%).
What are the cheapest flights from San Francisco to Region of Ontario?
Looking for the cheapest flight from San Francisco to Region of Ontario? While on average our users pay $1,251, our data indicates the cheapest price to be $158. The most popular route (San Francisco - Toronto Pearson Intl), is priced around $233.
Can I find deals for flights from San Francisco to Ontario that include hotel bookings?
Yes. In addition to deals on San Francisco to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Francisco to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Ontario.
Can I find deals for business class flights from San Francisco to Ontario?
Yes. Cheapflights offers flight deals from San Francisco to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from San Francisco to Region of Ontario?
Currently, February is the cheapest month in which you can book a flight from San Francisco to Region of Ontario (average of $127). Flying from San Francisco to Region of Ontario in August is currently the most expensive (average of $202). 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 8 airlines flying from San Francisco to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$36	Average$81	FlexibilityNo cancel fee	On-time62%
Air Canada	Cheapest$136	Average$521	FlexibilityNo cancel fee	On-time67%
WestJet	Cheapest$162	Average$401	FlexibilityNo cancel fee	On-time60%
Porter Airlines	Cheapest$172	Average$379	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$186	Average$498	FlexibilityNo cancel fee	On-time69%
Air Transat	Cheapest$188	Average$433	FlexibilityNo cancel fee	On-time50%
Delta	Cheapest$197	Average$532	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$403	Average$602	FlexibilityNo cancel fee	On-time71%

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$88+ Cheap flights from San Francisco (SFO) to Ontario

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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from San Francisco to Ontario

Cheapest flights from San Francisco to OntarioExplore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

Explore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.

Find flight deals from San Francisco to Ontario

Keep the following information in mind while searching for San Francisco to Ontario flight deals. Data was last updated diciembre 12, 2025.

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Best time to book a flight from San Francisco to Ontario

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

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

Find hourly flight availability from San Francisco to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 12, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Ontario. Price data was last updated on December 16, 2024.

Weekly flight availability from San Francisco to Region of Ontario

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United Airlines from San Francisco to Ontario to help guide your decision. Users have also rated airlines 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 San Francisco to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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Top 8 airlines flying from San Francisco to Ontario

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Cheapest flights from San Francisco to Ontario
Explore the most affordable flight options available from San Francisco to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.