$120+ 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 5/23. 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
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (CAON) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 30, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $221 (WestJet) |
One-way from | $124 (Justfly.com) |
Popular in | December |
Cheapest in | February |
Average price | $361 |
Good round-trip deal | $348 or less |
Good one-way deal | $206 or less |
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 enero 30, 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 enero 30, 2025.
This FlightHub deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Justfly.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Porter Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Porter Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Justfly.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Ontario to San Francisco within your budget
Customize your flight search to find flights from Ontario to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 30, 2025.
Fly from
Fly to
Route
Depart
Return
Price
HamiltonSan Francisco
YHM - SFO
YHMSFO
Hamilton
mar. 5/6
6:00 am-12:05 pm
1 stop9h 05m
San Francisco
mié. 5/14
12:50 pm-12:41 am
1 stop8h 51m
LondonSan Francisco
YXU - SFO
YXUSFO
London
jue. 6/5
6:00 am-1:59 pm
2 stops34h 59m
San Francisco
mar. 6/10
6:05 pm-5:14 am
1 stop8h 09m
MontrealSan Francisco
YUL - SFO
YULSFO
Montreal Pierre Elliott Trudeau Intl
vie. 3/14
6:45 am-12:39 pm
1 stop8h 54m
San Francisco
mié. 3/19
1:40 pm-12:35 am
1 stop7h 55m
LondonSan Francisco
YXU - SFO
YXUSFO
London
mié. 5/14
3:35 pm-9:49 pm
1 stop9h 14m
San Francisco
sáb. 5/24
10:45 pm-2:58 pm
2 stops13h 13m
MontrealSan Francisco
YUL - SFO
YULSFO
Montreal Pierre Elliott Trudeau Intl
jue. 4/24
6:45 am-12:39 pm
1 stop8h 54m
San Francisco
lun. 4/28
7:30 am-12:37 am
2 stops14h 07m
TorontoSan Francisco
YYZ - SFO
YYZSFO
Toronto Pearson Intl
lun. 2/10
9:45 am-12:39 pm
Nonstop5h 54m
San Francisco
lun. 2/17
10:59 pm-5:55 am
1 stop27h 56m
TorontoSan Francisco
YKF - SFO
YKFSFO
Toronto Region of Waterloo Intl
lun. 5/5
6:00 am-1:59 pm
2 stops10h 59m
San Francisco
mar. 5/13
12:50 pm-12:46 am
1 stop8h 56m
MontrealSan Francisco
YUL - SFO
YULSFO
Montreal Pierre Elliott Trudeau Intl
vie. 5/2
3:15 pm-9:25 pm
2 stops33h 10m
San Francisco
sáb. 5/10
7:30 am-12:37 am
2 stops14h 07m
TorontoSan Francisco
YYZ - SFO
YYZSFO
Toronto Pearson Intl
mié. 5/14
6:30 am-12:05 pm
1 stop8h 35m
San Francisco
mar. 5/20
2:45 pm-6:12 am
2 stops12h 27m
TorontoSan Francisco
YYZ - SFO
YYZSFO
Toronto Pearson Intl
mar. 3/4
5:10 pm-10:59 pm
1 stop8h 49m
San Francisco
lun. 3/10
12:15 am-12:34 pm
1 stop9h 19m
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?
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 $405). 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?
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 enero 30, 2025.
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
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 enero 30, 2025.
The most flights from CAON to SFO are scheduled on a Friday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
Rainfall in San Francisco by month
Plan your trip to San Francisco by taking into account the average rainfall totals 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
Plan your trip to San Francisco by taking into account the average temperature totals 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
Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated enero 30, 2025.
See what other customers who have flown with Alaska Airlines, Delta and Porter Airlines 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.
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
Seleste,Dec 2024
FAT - SAN
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.
Traveling to a place near Ontario?
Book flights to Ontario if you plan to visit one of these locationsBrowse 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 8 airlines flying from Ontario to San Francisco
Discover the top 8 airlines that operate flights from Ontario to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$114 | Average$233 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$200 | Average$470 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$255 | Average$493 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$262 | Average$373 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$266 | Average$437 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$269 | Average$563 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$318 | Average$505 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$435 | Average$526 | FlexibilityNo cancel fee | On-timeN/A |