Cheap flights from Ontario International to Fremont (ONT - SFO)

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The best prices from Ontario International to Fremont 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 Fremont (SFO)

ONT - SFO
Price
$148 - $289
SFO
Temperature
59 - 77 °F

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 Fremont

One-way from

$112

One-way flight from Ontario International to Fremont

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 Fremont?

Flights from Ontario International to Fremont are found to be more expensive on Sunday. 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 Fremont.

How far in advance should I book a flight from Ontario International to Fremont?

Travelers have found it’s best to book a flight 35 days in advance to save up to 7% 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 35 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 International to Fremont 1-2 weeks in advance for as low as $99, or $105 for flights within the next 24 hours.

What is the cheapest month to fly from Ontario International to Fremont?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, August can be a great choice for travel to Fremont. Flights to Fremont from Ontario International in August are about $108 on average during August, but can be found for as low as $48.

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

It’s typically best to fly out from Ontario International to Fremont 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 Fremont in February, March 2021

18 Mar - 21 Mar
$32pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
25 Mar - 1 Apr
$37pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
18 Mar - 21 Mar
$47pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

Ontario International to Fremont 2021 flight deals

18 Mar - 21 Mar
$32pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
25 Mar - 1 Apr
$37pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
4 Apr - 8 Apr
$41pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

Non-stop flights to Fremont from Ontario International

18 Mar - 21 Mar
$32pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
25 Mar - 1 Apr
$37pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
4 Apr - 8 Apr
$41pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario

Last minute flights from Ontario International to Fremont

7 Mar - 14 Mar
$37pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
Non-Stop
ONT
Ontario
7 Mar - 8 Mar
$55pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario
7 Mar - 10 Mar
$65pp
ONT
Ontario
Frontier
Non-Stop
SFO
San Francisco
SFO
San Francisco
Frontier
 
1 STOP
ONT
Ontario

One-way flights to Fremont from Ontario International

3:37 pm - 8:07 pm
Multiple Airlines
3 Stops
28h 30m
ONT - SFO
Multiple Airlines
$112
Gotogate
6:44 am - 7:44 pm
American Airlines
2 Stops
13h 00m
ONT - SFO
American Airlines
12:40 pm - 8:04 am
Frontier
2 Stops
19h 24m
ONT - SFO
Frontier
$114
Gotogate

Related info for your journey

Flight FAQs

From Ontario International to Fremont

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 Fremont for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario International to Fremont for under $100. The cheapest flight booked recently is on Frontier for just $32, but on average you can expect to pay $64.

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

Cheapflights has at least 20 direct flights from Ontario International to Fremont under $100. A good price for a nonstop flight from Ontario International to Fremont is less than $129.

Are there last-minute flights available from Ontario International to Fremont for under $100?

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

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

Nonstop flights are available for this route on the following days: Sunday, Monday, Tuesday, 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 International to Fremont on average per day?

2 flight departures from Ontario to San Francisco per day on average.
Afternoon (Noon - 6pm) - 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 10 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 Fremont?

For as low as $32, Frontier can have you in Fremont from Ontario International in 1h 22m. Airlines will cover a distance of 364 mi. Generally, flights for this route are nonstop.

What is the cheapest airline to fly from Ontario International to Fremont round-trip?

Currently priced at $32, Frontier will fly you from Ontario International to Fremont and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. You may be able to fly from Ontario International to Fremont for 83% less than the average price by searching for this airline.

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

$16 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines, with prices from $113.

Alternative routes for Ontario International to Fremont

Destination information for Fremont

Flight duration
1h 24m
Average temperature for February in Fremont
60.8 °F

Airports servicing Ontario

Airports servicing San Francisco

Top 9 airlines flying from Ontario International to Fremont

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 Fremont

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 Fremont
Sunday
6 daily flights
Monday
5 daily flights
Tuesday
4 daily flights
Wednesday
4 daily flights
Thursday
6 daily flights
Friday
6 daily flights
Saturday
5 daily flights
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