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Cheap flights from Ontario to San Francisco (ONT - SFO)

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The best prices from Ontario to San Francisco are usually found in March or April, booked 33 days in advance, depart on a Saturday or Friday and return on a Tuesday

How to find the cheapest flight from
Ontario (ONT) to San Francisco (SFO)

ONT - SFO
Price
$149 - $289
SFO
Temperature
59 - 77 °F
SFO
Rainfall
0 - 4.7 inches

Popular in

November

High demand for flights, 29% potential price rise

Cheapest in

March

Best time to find cheap flights, 28% potential price drop

Average price

$207

Average for round-trip flights in September 2020

Round-trip from

$149

From Ontario to San Francisco

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Ontario to San Francisco?

Flying to your destination on a Sunday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Francisco. Check prices with Cheapflights to find a great deal for your trip.

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

Travelers have found it’s best to book a flight 44 days in advance to save up to 20% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 44 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Ontario to San Francisco 1-2 weeks in advance for as low as $117, or $137 for flights within the next 24 hours.

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

The best pricing can be found in the month of February. Prices to San Francisco from Ontario average $121. You can even find prices in February for less than $121, as users have found deals to San Francisco from as low as $61. The month of April appears to be one of the more expensive times to travel to San Francisco from Ontario. Flying in the targeted month can save you up to 8%.

When is the cheapest time to fly from Ontario to San Francisco (ONT - SFO)?

When flying from Ontario to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 29% versus a flight in the evening.

Cheap flights from Ontario to San Francisco in September, October 2020

The best prices found for ONT to SFO flights for September, October
23 Oct - 26 Oct
$161pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
13 Oct - 15 Oct
$184pp
ONT
Ontario
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario
9 Oct - 12 Oct
$195pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario

Ontario to San Francisco 2020 flight deals

Cheap flights to San Francisco from Ontario found for this year
23 Oct - 26 Oct
$161pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
12 Nov - 15 Nov
$178pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
13 Oct - 15 Oct
$184pp
ONT
Ontario
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario

Non-stop flights to San Francisco from Ontario

Save time with Ontario to San Francisco direct flight deals
10 Oct - 12 Oct
$3,394pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SFO
San Francisco
SFO
San Francisco
Linear Air Taxi
Non-Stop
ONT
Ontario
8 Oct - 11 Oct
$3,410pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SFO
San Francisco
SFO
San Francisco
Linear Air Taxi
Non-Stop
ONT
Ontario
9 Oct - 9 Oct
$3,813pp
ONT
Ontario
Linear Air Taxi
Non-Stop
SFO
San Francisco
SFO
San Francisco
Linear Air Taxi
Non-Stop
ONT
Ontario

Last minute flights from Ontario to San Francisco

Late deals on round-trip flights to San Francisco from Ontario, departing today and this week
9 Oct - 12 Oct
$195pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
7 Oct - 7 Oct
$243pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
8 Oct - 11 Oct
$292pp
ONT
Ontario
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
American Airlines
 
1 STOP
ONT
Ontario

One-way flights to San Francisco from Ontario

The cheapest one-way flights from Ontario to San Francisco
7:15 am - 7:20 pm
Delta
1 Stop
12h 05m
ONT - SFO
Delta
$315
Delta
4:00 am - 5:11 pm
Multiple Airlines
2 Stops
13h 11m
ONT - SFO
Multiple Airlines
$887
mytrip.com
4:22 am - 12:45 pm
Linear Air Taxi
2 Stops
8h 23m
ONT - SFO
Linear Air Taxi
$2,676
Travelgenio

Related info for your journey

Useful info, stats and facts about Ontario to San Francisco flights.

Flight FAQs

From Ontario to San Francisco

Are flight prices decreasing from Ontario to San Francisco due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and San Francisco for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Can I find flights from Ontario to San Francisco for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to San Francisco for under $200. The cheapest flight booked recently is on Multiple Airlines for just $161, but on average you can expect to pay $237.

Are there nonstop flights from Ontario to San Francisco for under $3,400 on Cheapflights?

Cheapflights has at least 10 direct flights from Ontario to San Francisco under $3,400. A good price for a nonstop flight from Ontario to San Francisco is less than $4,844.

Are there last-minute flights available from Ontario to San Francisco for under $200?

There are currently 20+ open flights from Ontario to San Francisco within the next 7 days for less than $200.

What days are nonstop flights available from Ontario to San Francisco?

Nonstop flights are available for this route on the following days: Sunday, Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this flight route?

This flight path from Ontario to San Francisco was viewed by 880 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from Ontario to San Francisco on average per day?

2 flight departures from Ontario to San Francisco per day on average.
Morning (6am - Noon) - 100% of flight departures

Does it rain more in Ontario or San Francisco?

In Ontario, there will be same rainfall in Ontario compared to San Francisco over the next 2 days.

Is Ontario weather warmer or cooler than San Francisco?

We forecast the temperature to be around the 95 °F's in July, on average. The temperature in San Francisco is generally colder than in Ontario. Book flights in a timely manner in correlation to your departure date.

What is the cheapest airline to fly from Ontario to San Francisco round-trip?

Our cheapest airline available from Ontario to San Francisco is Delta. Our recent data shows that you can find tickets from as low as $278 on this airline.

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

One-way options have recently been found by users for as low as $227 on Delta. Another option is Linear Air Taxi, who have fights from $1,676.

Alternative routes for Ontario to San Francisco

Destination information for San Francisco

Things to know before you go. Useful info for your trip from Ontario to San Francisco
Average temperature for September in San Francisco
77.0 °F
Avg rainfall for September in San Francisco
0.1 ″

Airports servicing Ontario

Airports servicing San Francisco

Hourly flight availability from Ontario to San Francisco

Morning 6 AM to noon 50% of ONT to SFO departures
Afternoon Noon to 6 PM 50% of ONT to SFO departures
Early morning Midnight to 6 AM 0% of ONT to SFO departures
Evening 6 PM to midnight 0% of ONT to SFO departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Ontario to San Francisco
Sunday
4 daily flights
Monday
4 daily flights
Tuesday
4 daily flights
Wednesday
4 daily flights
Thursday
4 daily flights
Friday
4 daily flights
Saturday
4 daily flights
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