How popular is this Ontario to Fremont flight route?

Within the past month, 98 users have taken a look at flights from Ontario to Fremont.

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

$29 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $58 and $58, respectively.

Weekly flight availability from Ontario to Fremont

The most flights from ONT to FR8 are scheduled on a Friday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

In terms of precipitation, rainfall in Fremont ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit Fremont when rainfall is around 0.0 in.

If weather is an important factor for your trip to Fremont, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What are the cheapest flights from Ontario to Fremont?

Looking for the cheapest flight from Ontario to Fremont? While on average our users pay $1,529, our data indicates the cheapest price to be $31. The most popular route (Ontario - San Francisco), is priced around $58.

What are the most reliable airlines from Ontario to Fremont?

No one likes to see their flight delayed. When booking a flight from Ontario to Fremont consider choosing Emirates (75%), Air Canada (62%) or United Airlines (62%) as they are the most reliable in getting you off to your destination on time.

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

Before booking your flight from Ontario to Fremont check out the most popular airlines for this route: United Airlines, Frontier or Alaska Airlines.

What airport do you fly from for flights from Ontario to Fremont?

Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Fremont from Ontario. Booking flights from Ontario (ONT) to Fremont should be relatively easy as there are 6 daily outbound flights to Fremont from 5 different airlines.

Can I find deals for flights from Ontario to Fremont that include hotel bookings?

Yes. In addition to deals on Ontario to Fremont flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Fremont?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Fremont.

Can I find deals for business class flights from Ontario to Fremont?

Yes. Cheapflights offers flight deals from Ontario to Fremont by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Find Cheap Flights from Ontario to Fremont

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Cheapflights Tip: The best prices from Ontario to Fremont are usually found in October or August, booked 73 days in advance, depart on a Friday or Saturday and return on a Monday

Find flight deals from Ontario to Fremont

Most accurate provider	FlightHub 3 stars
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Popular in	February
Cheapest in	October
Average price	$185

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Highest demand for flights based on searches. 20% potential increase in price ($56 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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Everything you need to know about your flight from Ontario to Fremont

Prices

Airlines

What is the cheapest time of day to fly from ONT to FR8?

When flying from Ontario to Fremont, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight in the afternoon.

What is the cheapest day to fly from Ontario to Fremont?

Travelers seeking maximum savings on their Ontario to Fremont flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Fremont

Get a feel of what it's like to fly with Southwest,Alaska Airlines, andUnited Airlines from Ontario to Fremont by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,202 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Alaska Airlines

7.9

Good

12,977 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

10,245 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

JetBlue

7.1

Good

3,041 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.6

Fair

2,575 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

What airport do you fly from for flights from Ontario to Fremont?
Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Fremont from Ontario. Booking flights from Ontario (ONT) to Fremont should be relatively easy as there are 6 daily outbound flights to Fremont from 5 different airlines.
How popular is this Ontario to Fremont flight route?
Within the past month, 98 users have taken a look at flights from Ontario to Fremont.
What are the cheapest airlines to fly from Ontario to Fremont one-way?
$29 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $58 and $58, respectively.
What are the most reliable airlines from Ontario to Fremont?
No one likes to see their flight delayed. When booking a flight from Ontario to Fremont consider choosing Emirates (75%), Air Canada (62%) or United Airlines (62%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Ontario to Fremont?
Looking for the cheapest flight from Ontario to Fremont? While on average our users pay $1,529, our data indicates the cheapest price to be $31. The most popular route (Ontario - San Francisco), is priced around $58.
Can I find deals for flights from Ontario to Fremont that include hotel bookings?
Yes. In addition to deals on Ontario to Fremont flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Fremont?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Fremont.
Can I find deals for business class flights from Ontario to Fremont?
Yes. Cheapflights offers flight deals from Ontario to Fremont by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Top 5 airlines flying from Ontario to Fremont

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$29	Average$137	FlexibilityNo cancel fee	On-time62%
Alaska Airlines	Cheapest$91	Average$192	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$115	Average$256	FlexibilityNo cancel fee	On-time69%
JetBlue	Cheapest$120	Average$188	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$146	Average$336	FlexibilityNo cancel fee	On-time63%

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Cheap flights from Ontario (ONT) to Fremont, CA

Find cheap flights from Ontario to Fremont with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Ontario to Fremont

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Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from ONT to FR8?

When flying from Ontario to Fremont, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight in the afternoon.

What is the cheapest day to fly from Ontario to Fremont?

Travelers seeking maximum savings on their Ontario to Fremont flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ontario to Fremont

The most flights from ONT to FR8 are scheduled on a Friday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Fremont

Get a feel of what it's like to fly with Southwest,Alaska Airlines, andUnited Airlines from Ontario to Fremont by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Ontario to Fremont?

How popular is this Ontario to Fremont flight route?

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

What are the most reliable airlines from Ontario to Fremont?

What are the cheapest flights from Ontario to Fremont?

Can I find deals for flights from Ontario to Fremont that include hotel bookings?

How can I find direct flights from Ontario to Fremont?

Can I find deals for business class flights from Ontario to Fremont?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Fremont

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

Complete your trip

Complete your trip to Fremont by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Ontario to Fremont by cabin class

Find flights from Ontario to Fremont, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Ontario and Fremont flights

Browse other Ontario and Fremont flight options. Last updated on September 26, 2026.

Other flights from Ontario

Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 26, 2026.

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