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

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The best prices from Ontario International to San Francisco are usually found in August or April, booked 35 days in advance, depart on a Saturday or Friday and return on a Tuesday

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

ONT - SFO
Price
$148 - $289
SFO
Temperature
59 - 77 °F
SFO
Rainfall
0 - 4.7 inches

Popular in

November

High demand for flights, 33% potential price rise

Cheapest in

August

Best time to find cheap flights, 24% potential price drop

Round-trip from

$148

From Ontario International to San Francisco

One-way from

$29

One-way flight from Ontario International 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 International 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 International to San Francisco?

To save on the cost of your flight from Ontario International to San Francisco, book at least 35 days before your planned departure. Booking around this time can save you about 7% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $99 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $105.

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

August can be a great time to fly to San Francisco from Ontario International with a flight ticket averaging about $108. Cheapflights users have found deals in the month of August for as cheap as $48. The most expensive prices can be found in the month of June.

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

It’s typically best to fly out from Ontario International to San Francisco in the morning. Doing so could potentially save you 29% on the flight price compared to flying in the evening, which is usually more expensive.

Cheap flights from Ontario International to San Francisco in January, February 2021

10 Feb - 15 Feb
$57pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
19 Feb - 22 Feb
$72pp
ONT
Ontario
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario
12 Feb - 15 Feb
$77pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario

Ontario International to San Francisco 2021 flight deals

10 Feb - 15 Feb
$57pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
19 Feb - 22 Feb
$72pp
ONT
Ontario
Frontier
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario
12 Feb - 15 Feb
$77pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario

Non-stop flights to San Francisco from Ontario International

10 Feb - 15 Feb
$57pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
12 Feb - 15 Feb
$77pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario
19 Mar - 19 Mar
$97pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
ONT
Ontario

Last minute flights from Ontario International to San Francisco

5 Feb - 5 Feb
$156pp
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
 
1 STOP
ONT
Ontario
4 Feb - 7 Feb
$183pp
ONT
Ontario
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
ONT
Ontario
5 Feb - 8 Feb
$224pp
ONT
Ontario
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario

One-way flights to San Francisco from Ontario International

10:45 am - 12:20 pm
United Airlines
Nonstop
1h 35m
ONT - SFO
United Airlines
$29
United
4:30 am - 2:29 pm
Multiple Airlines
3 Stops
33h 59m
ONT - SFO
Multiple Airlines
$103
Gotogate
10:15 am - 3:46 am
Frontier
2 Stops
17h 31m
ONT - SFO
Frontier
$104
Gotogate

Related info for your journey

Flight FAQs

From Ontario International 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.

What safety measures are being taken by airlines flying from Ontario to San Francisco to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Alaska Airlines and Delta are some airlines that have done so. Some of the new policies that have been implemented to accommodate travelers flying from Ontario to San Francisco are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

Which airlines flying from Ontario to San Francisco have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, American Airlines, and Alaska Airlines flying from Ontario to San Francisco have implemented new flexible cancellation policies.

Can I find flights from Ontario International to San Francisco for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario International to San Francisco for under $100. The cheapest flight booked recently is on United Airlines for just $57, but on average you can expect to pay $111.

Are there nonstop flights from Ontario International to San Francisco for under $100 on Cheapflights?

Cheapflights has at least 20 direct flights from Ontario International to San Francisco under $100. A good price for a nonstop flight from Ontario International to San Francisco is less than $543.

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

There are currently 20+ open flights from Ontario International 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: Tuesday, Wednesday.

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 International 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 less rainfall in Ontario compared to San Francisco over the next 8 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.

How long is the flight from Ontario International to San Francisco?

A quick flight from Ontario International to San Francisco can take about 1h 27m. United Airlines provides one of the quickest options available for as low as $97. The distance from Ontario International to San Francisco is about 364 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from Ontario International to San Francisco round-trip?

According to our current data, United Airlines ($57), and Frontier ($72) offers the cheapest pricing from Ontario International to San Francisco. United Airlines is currently priced 70% below the average price you’ll pay for this route.

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

The cheapest airlines for a one-way flight from Ontario International to San Francisco are United Airlines ($29) and Frontier ($41).

Alternative routes for Ontario International to San Francisco

Destination information for San Francisco

Flight duration
1h 27m
Average temperature for January in San Francisco
59.0 °F
Avg rainfall for January in San Francisco
2.2 ″

Airports servicing Ontario

Airports servicing San Francisco

Top 9 airlines flying from Ontario International to San Francisco

Airline Cheapest Average Flexibility On-time COVID-19 safety
Delta
$52 $119 No cancel fee N/A
Alaska Airlines
$48 $139 No cancel fee 75%
Spirit Airlines
$91 $142 No cancel fee 65%
Southwest
$154 $200 No cancel fee 63%
JetBlue
$49 $218 No cancel fee 62%
United Airlines
$97 $223 No cancel fee 69%
American Airlines
$71 $224 No cancel fee 71%
JSX
$208 $313 No cancel fee N/A

We couldn't confirm the COVID-19 safety measures taken by JSX. Please check directly on their website for additional information.

Linear Air Taxi
$3,843 $6,801 No cancel fee N/A

We couldn't confirm the COVID-19 safety measures taken by Linear Air Taxi. Please check directly on their website for additional information.

Hourly flight availability from Ontario International to San Francisco

Afternoon Noon to 6 PM 53% of ONT to SFO departures
Early morning Midnight to 6 AM 27% of ONT to SFO departures
Morning 6 AM to noon 20% 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 International to San Francisco
Sunday
6 daily flights
Monday
7 daily flights
Tuesday
4 daily flights
Wednesday
4 daily flights
Thursday
5 daily flights
Friday
6 daily flights
Saturday
7 daily flights
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