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 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 (ONT) to San Francisco (SFO)

All the information you need to plan the best ONT to SFO flight in 2021: compare Ontario to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.
ONT - SFO
Price
$148 - $289
SFO
Temperature
51.8 - 62.6 °F
SFO
Precipitation
0 - 4.4 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 to San Francisco

One-way from

$79

One-way flight 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.
How far in advance should I book a flight from Ontario to San Francisco?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 30 days in advance, which can save you up to 118% on flights from Ontario to San Francisco compared to booking the week you need them. Waiting 30 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $176. For sooner than that we have options available in the next 3 days from $271.

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

Users have found that flying from Ontario to San Francisco on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

July can be a great time to fly to San Francisco from Ontario with a flight ticket averaging about $134. Cheapflights users have found deals in the month of July for as cheap as $96. The most expensive prices can be found in the month of March.

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

One of the essential ways to save on airfare from Ontario to San Francisco is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 23% on airfare.

Cheap flights from Ontario to San Francisco in October, November 2021

The best prices found for ONT to SFO flights for October, November
12 Nov - 15 Nov
$46pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
10 Nov - 12 Nov
$47pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
8 Nov - 15 Nov
$50pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

Ontario to San Francisco 2021 flight deals

Cheap flights to San Francisco from Ontario found for this year
10 Dec - 13 Dec
$46pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
6 Dec - 15 Dec
$47pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
8 Nov - 15 Nov
$50pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

Non-stop flights to San Francisco from Ontario

Save time with Ontario to San Francisco direct flight deals
10 Dec - 13 Dec
$46pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
6 Dec - 15 Dec
$47pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
12 Nov - 15 Nov
$50pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
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
5 Nov - 8 Nov
$55pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
4 Nov - 10 Nov
$59pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
1 Nov - 6 Nov
$64pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

One-way flights to San Francisco from Ontario

The cheapest one-way flights from Ontario to San Francisco
1:00 am - 2:29 am
United Airlines
Nonstop
1h 29m
ONT - SFO
United Airlines
$79
United
1:15 am - 2:09 pm
American Airlines
2 Stops
12h 54m
ONT - SFO
American Airlines
10:35 am - 4:14 am
Frontier
2 Stops
17h 39m
ONT - SFO
Frontier
$85
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Ontario</span> to <span class="emphasized">San Francisco</span> flights.

Flight FAQs

From Ontario to San Francisco

What airports do I use to fly from Ontario to San Francisco?

To fly from Ontario to San Francisco, you need to book a flight from Ontario (ONT) to San Francisco (SFO). Nonstop flights to San Francisco from Ontario take 1h 18m on average. When it comes time to book airfare, you have a few options: there are 9 outbound flights from Ontario to San Francisco offered by 10 different airlines.

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 to San Francisco for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario to San Francisco for under $100. The cheapest flight booked recently is on Frontier for just $46, but on average you can expect to pay $69.

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

Cheapflights has at least 20 direct flights from Ontario to San Francisco under $100. A good price for a nonstop flight from Ontario to San Francisco is less than $69.

Are there last-minute flights available from Ontario to San Francisco for under $100?

There are currently 20+ open flights from Ontario to San Francisco within the next 7 days for less than $100.

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

You can find nonstop flights on the following days: Wednesday, Thursday, Friday, Saturday.

How popular is this Ontario to San Francisco flight route?

This flight path from Ontario to San Francisco was viewed by 111 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?

7 flight departures from Ontario to San Francisco per day on average.
Early Morning (Midnight to 6am) - 29% of flight departures
Morning (6am - Noon) - 43% of flight departures
Afternoon (Noon - 6pm) - 14% of flight departures
Evening (6pm - Midnight) - 14% of flight departures

How long is the flight from Ontario to San Francisco?

A quick flight from Ontario to San Francisco can take about 1h 25m. Frontier provides one of the quickest options available for as low as $46. The distance from Ontario to San Francisco is about 364 mi. All flights are typically nonstop.

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

Flying on Frontier is currently your cheapest option to San Francisco, with prices starting at $46. You may be able to fly from Ontario to San Francisco for 76% less than the average price by searching for this airline.

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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $24. However, be on the lookout for offers from United Airlines and American Airlines, as they are both options that can get you from Ontario to San Francisco for a low price.

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

Before booking your flight from Ontario to San Francisco check out the most popular airlines for this route: Major Airline, American Airlines or Alaska Airlines.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ontario to San Francisco on time: Copa Airlines (100%), Frontier (92%), Air Canada (82%).

What are the cheapest flights from Ontario to San Francisco?

On average you can expect to pay $365 for a flight from Ontario to San Francisco. The cheapest flight overall is $58 while the most popular route, (Ontario - San Francisco) is currently priced at $83.

COVID Restrictions

View COVID Travel Restrictions for San Francisco, CA

Do I need a COVID test to fly to San Francisco from Ontario?

Information is based on travel restrictions for travel to San Francisco within the United States

Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter San Francisco.

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to San Francisco.

Quarantine requirements
Visitors from Ontario are not required to quarantine after entering San Francisco.

Do I need a test to fly back to Ontario from San Francisco?

Returning to Ontario from San Francisco

COVID-19 testing requirements
Visitors from San Francisco must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Ontario.

Quarantine requirements
Visitors from San Francisco are not required to quarantine after entering Ontario.

Hide COVID Travel Restrictions for San Francisco, CA

Alternative routes for Ontario to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for San Francisco

Things to know before you go - useful duration and weather info for your trip from Ontario to San Francisco.
Flight duration from ONT to SFO
1h 28m
Average temperature for October in San Francisco
71.6 °F
Avg rainfall for October in San Francisco
1.2 ″

Airports servicing Ontario

Airports servicing San Francisco

Top 9 airlines flying from Ontario to San Francisco

The chart below displays the airlines Cheapflights users traveling from Ontario to San Francisco choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Alaska Airlines
$48 $139 No cancel fee 75%
JetBlue
$49 $218 No cancel fee 62%
Delta
$52 $119 No cancel fee N/A
American Airlines
$71 $224 No cancel fee 71%
Spirit Airlines
$91 $142 No cancel fee 65%
United Airlines
$97 $223 No cancel fee 69%
Southwest
$154 $200 No cancel fee 63%
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 to San Francisco

See what time of day planes typically take off from Ontario towards San Francisco.
Afternoon Noon to 6 PM 56% of ONT to SFO departures
Morning 6 AM to noon 25% of ONT to SFO departures
Early morning Midnight to 6 AM 19% 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
See how many times per day planes take to the skies headed from Ontario to San Francisco.
Sunday
11 daily flights
Monday
11 daily flights
Tuesday
8 daily flights
Wednesday
10 daily flights
Thursday
8 daily flights
Friday
11 daily flights
Saturday
9 daily flights
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