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

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The best prices from San Francisco to Ontario are usually found in August or April, booked 26 days in advance, depart on a Monday or Friday and return on a Wednesday

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

All the information you need to plan the best SFO to ONT flight in 2022: compare San Francisco to Ontario flight prices with the expected peak season, weather and rainfall in Ontario.
SFO - ONT
Price
$166 - $292
ONT
Temperature
53.6 - 78.8 °F
ONT
Rainfall
0.1 - 3.4 inches

Popular in

November

High demand for flights, 23% potential price rise

Cheapest in

August

Best time to find cheap flights, 26% potential price drop

Round-trip from

$166

From San Francisco to Ontario

One-way from

$89

One-way flight from San Francisco to Ontario

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

Flights from San Francisco to Ontario lean towards being more expensive in November. Prices are generally better when you fly from San Francisco to Ontario in July, with the cheapest ticket starting at $96.

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

Monday flights are generally found to be more expensive for flights from San Francisco to Ontario. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Ontario.

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

Find a great deal and save up to 106% by booking at least 31 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to Ontario within the next two weeks, with the cheapest ticket starting at $180.

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

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from San Francisco to Ontario by exploring options for tickets in the morning.

Cheap flights from San Francisco to Ontario in May, June 2022

The best prices found for SFO to ONT flights for May, June
25 May - 29 May
$81pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
25 May - 28 May
$90pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
28 May - 31 May
$95pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco

San Francisco to Ontario 2022 flight deals

Cheap flights to Ontario from San Francisco found for this year
24 May - 25 May
$60pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
24 May - 31 May
$68pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
9 Aug - 18 Aug
$75pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco

Non-stop flights to Ontario from San Francisco

Save time with San Francisco to Ontario direct flight deals
9 Aug - 18 Aug
$75pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
22 Aug - 25 Aug
$95pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
9 Aug - 11 Aug
$96pp
SFO
San Francisco
Multiple Airlines
Non-Stop
ONT
Ontario
ONT
Ontario
United Airlines
Non-Stop
SFO
San Francisco

Last minute flights from San Francisco to Ontario

Late deals on round-trip flights to Ontario from San Francisco, departing today and this week
31 May - 31 May
$145pp
SFO
San Francisco
Multiple Airlines
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
31 May - 10 Jun
$155pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
SFO
San Francisco
31 May - 31 May
$179pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
 
1 STOP
SFO
San Francisco

One-way flights to Ontario from San Francisco

The cheapest one-way flights from San Francisco to Ontario
6:59 pm - 8:30 pm
United Airlines
Nonstop
1h 31m
SFO - ONT
United Airlines
$89
United
4:45 pm - 7:56 pm
Multiple Airlines
1 Stop
27h 11m
SFO - ONT
Multiple Airlines
$91
Kiwi.com
4:37 pm - 5:10 am
Frontier
1 Stop
12h 33m
SFO - ONT
Frontier
$97
Flights by SU

Related info for your journey

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

Flight FAQs

From San Francisco to Ontario

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

Ontario is the airport most travelers will use when flying to Ontario from San Francisco. Booking flights from San Francisco (SFO) to Ontario (ONT) should be relatively easy as there are 8 daily flights to Ontario from 12 different airlines. 1h 18m is how long a flight from San Francisco to Ontario will take if you book a nonstop flight.

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

Some of our airline partners flying from San Francisco to Ontario have new flexible policies in place due to COVID-19. Frontier, United Airlines, and Southwest are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Frontier with this kind of flexibility.

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

Yes, there are multiple flights from San Francisco to Ontario for under $100. The cheapest flight booked recently is on Frontier for just $75, but on average you can expect to pay $116.

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

Cheapflights has at least 20 direct flights from San Francisco to Ontario under $100. A good price for a nonstop flight from San Francisco to Ontario is less than $119.

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

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

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

Nonstop flights can be found on the following days: Sunday, Monday, Thursday, Friday, Saturday.

How popular is this San Francisco to Ontario flight route?

Within the past month, 36 users have taken a look at flights from San Francisco to Ontario.

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

Per day, 9 flights depart from San Francisco to Ontario on average.
Morning (6am - Noon) - 22% of flight departures
Afternoon (Noon - 6pm) - 33% of flight departures
Evening (6pm - Midnight) - 44% of flight departures

How long is the flight from San Francisco to Ontario?

A quick flight from San Francisco to Ontario can take about 1h 20m. Frontier provides one of the quickest options available for as low as $75. San Francisco and Ontario are separated by a distance of 364 mi. All flights are typically nonstop.

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

Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $75. Another option worth looking into is United Airlines, starting at $138 round trip. You may be able to fly from San Francisco to Ontario for 66% less than the average price by searching for these airlines.

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

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

What are the cheapest flights from San Francisco to Ontario?

On average you can expect to pay $259 for a flight from San Francisco to Ontario. The cheapest flight overall is $22 while the most popular route, (San Francisco - Ontario) is currently priced at $96.

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

No one likes to see their flight delayed. When booking a flight from San Francisco to Ontario consider choosing SkyWest Airlines (86%), Air Canada (86%) or United Airlines (81%) as they are the most reliable in getting you off to your destination on time.

COVID Restrictions

View COVID Travel Restrictions for Ontario, CA

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

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

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

COVID-19 testing requirements
Visitors from San Francisco must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Ontario.

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

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

Returning to San Francisco from Ontario

COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to San Francisco.

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

Hide COVID Travel Restrictions for Ontario, CA

Alternative routes for San Francisco to Ontario

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

Destination information for Ontario

Things to know before you go - useful duration and weather info for your trip from San Francisco to Ontario.
Flight duration from SFO to ONT
1h 27m

Airports servicing San Francisco

Airports servicing Ontario

Top 9 airlines flying from San Francisco to Ontario

The chart below displays the airlines Cheapflights users traveling from San Francisco to Ontario 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
Juneyao Airlines
$10 $16 No cancel fee 66%

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

Frontier
$33 $73 No cancel fee 62%
Alaska Airlines
$38 $142 No cancel fee 75%
JetBlue
$51 $97 No cancel fee 62%
Spirit Airlines
$60 $143 No cancel fee 65%
United Airlines
$78 $237 No cancel fee 69%
Delta
$93 $205 No cancel fee N/A
American Airlines
$120 $247 No cancel fee 71%
JSX
$147 $316 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.

Hourly flight availability from San Francisco to Ontario

See what time of day planes typically take off from San Francisco towards Ontario.
Afternoon Noon to 6 PM 57% of SFO to ONT departures
Evening 6 PM to midnight 35% of SFO to ONT departures
Morning 6 AM to noon 7% of SFO to ONT departures
Early morning Midnight to 6 AM 1% of SFO to ONT departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from San Francisco to Ontario
See how many times per day planes take to the skies headed from San Francisco to Ontario.
Sunday
7 daily flights
Monday
9 daily flights
Tuesday
9 daily flights
Wednesday
9 daily flights
Thursday
8 daily flights
Friday
8 daily flights
Saturday
6 daily flights
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