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 Tuesday or Thursday and return on a Saturday

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 2021: 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
Precipitation
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

$79

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 27% on flights from San Francisco to Ontario by exploring options for tickets in the evening.

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

Saturday 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.

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.

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

The best prices found for SFO to ONT flights for October, November
8 Nov - 15 Nov
$46pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
15 Nov - 17 Nov
$50pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
15 Nov - 20 Nov
$53pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco

San Francisco to Ontario 2021 flight deals

Cheap flights to Ontario from San Francisco found for this year
10 Dec - 13 Dec
$46pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
15 Nov - 17 Nov
$50pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
15 Nov - 20 Nov
$53pp
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
8 Nov - 15 Nov
$46pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
3 Dec - 6 Dec
$50pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
15 Nov - 20 Nov
$53pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
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
5 Nov - 8 Nov
$55pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
4 Nov - 1 Dec
$59pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
5 Nov - 6 Nov
$64pp
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco

One-way flights to Ontario from San Francisco

The cheapest one-way flights from San Francisco to Ontario
5:49 pm - 7:15 pm
United Airlines
Nonstop
1h 26m
SFO - ONT
United Airlines
$79
United
10:33 am - 4:49 pm
American Airlines
2 Stops
6h 16m
SFO - ONT
American Airlines
4:26 am - 11:36 am
Frontier
1 Stop
7h 10m
SFO - ONT
Frontier
$84
Orbitz

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 6 daily flights to Ontario from 10 different airlines. 1h 22m 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. United Airlines, American Airlines, and Alaska Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like United Airlines 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 $46, but on average you can expect to pay $71.

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 $71.

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

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

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

Nonstop flights can be found on the following days: Tuesday, Wednesday, Thursday, Friday, Saturday.

How popular is this San Francisco to Ontario flight route?

Within the past month, 37 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, 8 flights depart from San Francisco to Ontario on average.
Morning (6am - Noon) - 38% of flight departures
Afternoon (Noon - 6pm) - 13% of flight departures
Evening (6pm - Midnight) - 50% 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 33m. Frontier provides one of the quickest options available for as low as $46. San Francisco and Ontario are separated by a distance of 364 mi. All flights are typically nonstop.

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

Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $46. You may be able to fly from San Francisco to Ontario for 79% less than the average price by searching for this airline.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $24. United Airlines flights start at $59 while deals on American Airlines start at $76 one-way.

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 Frontier (91%), United Airlines (89%) or Air Canada (87%) as they are the most reliable in getting you off to your destination on time.

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 $296 for a flight from San Francisco to Ontario. The cheapest flight overall is $53 while the most popular route, (San Francisco - Ontario) is currently priced at $83.

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 72 hours 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 72 hours 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 30m

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
Delta
$56 $154 No cancel fee N/A
JetBlue
$75 $232 No cancel fee 62%
Alaska Airlines
$76 $201 No cancel fee 75%
Spirit Airlines
$89 $153 No cancel fee 65%
United Airlines
$107 $253 No cancel fee 69%
American Airlines
$112 $270 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.

Southwest
$152 $223 No cancel fee 63%
Linear Air Taxi
$1,880 $5,192 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 San Francisco to Ontario

See what time of day planes typically take off from San Francisco towards Ontario.
Afternoon Noon to 6 PM 76% of SFO to ONT departures
Morning 6 AM to noon 23% of SFO to ONT departures
Early morning Midnight to 6 AM 1% of SFO to ONT departures
Evening 6 PM to midnight 0% 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
4 daily flights
Monday
9 daily flights
Tuesday
8 daily flights
Wednesday
6 daily flights
Thursday
7 daily flights
Friday
7 daily flights
Saturday
5 daily flights
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