FAT - ONT

$100 Find Cheap Flights from Fresno to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Fresno to Ontario departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Fresno to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Fresno to Ontario, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Fresno to Ontario (FAT-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Fresno to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Fresno to Ontario

Wed, Oct 8 - Wed, Oct 15
 Logo
2:32 pm - 8:42 pmFAT-ONT
6h 10m1 stop
 Logo
8:00 am - 1:42 pmONT-FAT
5h 42m1 stop
Tue, Oct 7 - Wed, Oct 15
 Logo
11:07 am - 8:42 pmFAT-ONT
9h 35m1 stop
 Logo
8:00 am - 1:42 pmONT-FAT
5h 42m1 stop
Wed, Oct 8 - Mon, Oct 13
 Logo
2:32 pm - 8:42 pmFAT-ONT
6h 10m1 stop
 Logo
10:47 pm - 10:17 amONT-FAT
11h 30m1 stop
Tue, Oct 7 - Mon, Oct 13
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11:07 am - 8:42 pmFAT-ONT
9h 35m1 stop
 Logo
10:47 pm - 10:17 amONT-FAT
11h 30m1 stop
Mon, Oct 6 - Tue, Oct 14
United Airlines Logo
8:31 am - 12:13 pmFAT-ONT
3h 42m1 stop
United Airlines Logo
9:36 am - 1:56 pmONT-FAT
4h 20m1 stop
$242United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Southwest Logo
5:40 am - 10:10 amFAT-ONT
4h 30m1 stop
Southwest Logo
11:10 am - 8:10 pmONT-FAT
9h 00m2 stops
$259Southwest
Find Deal
Tue, Oct 7 - Tue, Oct 14
United Airlines Logo
8:31 am - 12:13 pmFAT-ONT
3h 42m1 stop
United Airlines Logo
9:36 am - 1:56 pmONT-FAT
4h 20m1 stop
$297United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Southwest Logo
5:40 am - 1:10 pmFAT-ONT
7h 30m2 stops
Southwest Logo
11:10 am - 8:10 pmONT-FAT
9h 00m2 stops
$299Southwest
Find Deal
Mon, Sep 22 - Mon, Sep 29
Alaska Airlines Logo
11:53 am - 9:26 amFAT-ONT
21h 33m1 stop
Alaska Airlines Logo
5:49 pm - 9:10 amONT-FAT
15h 21m1 stop
$342Alaska Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Alaska Airlines Logo
2:40 pm - 12:37 pmFAT-ONT
21h 57m2 stops
Alaska Airlines Logo
5:45 pm - 1:40 pmONT-FAT
19h 55m1 stop
$371Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Fresno to Ontario flights

Get data-powered insights and trends into flights from Fresno to Ontario to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Fresno to Ontario?

The average price of all round-trip flights from Fresno to Ontario clicked on KAYAK for each day over the last 12 months.

For Fresno to Ontario, Saturday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Ontario back to Fresno, the best deals are generally found on Saturday, with Sunday being the most expensive.

What is the cheapest month to fly from Fresno to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Fresno to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Fresno to Ontario is February, where tickets cost $266 (return) on average. On the other hand, the most expensive months are August and May, where the average cost of round-trip tickets is $656 and $579 respectively.

Good to know

Low seasonJune
Cheapest flight$100
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Fresno to Ontario

When to book flights from Fresno to Ontario

Are your dates flexible? Find out the best times to travel from Fresno to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Fresno to Ontario

  • What is the cheapest flight from Fresno to Ontario?

    In the last 3 days, the lowest price for a flight from Fresno to Ontario was $100 for a one-way ticket and $194 for a round-trip.

  • Do I need a passport to fly between Fresno and Ontario?

    A passport is not required to fly from Fresno to Ontario.

  • Which airports will I be using when flying from Fresno to Ontario?

    Fresno and Ontario are both served by 1 main airport. You will leave Fresno from Fresno Airterminal and will be arriving at Ontario.

  • Which aircraft models fly most regularly from Fresno to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Fresno to Ontario?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Fresno and Ontario, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Fresno to Ontario, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from Fresno to Ontario are Southwest and United Airlines. With an average price for the route of $326 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $366 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Fresno to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Fresno to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Fresno to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Fresno is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Fresno to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Fresno with another airline. Booking your flights between Fresno and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Fresno to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Fresno up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Fresno to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Fresno to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Fresno to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4242 reviews
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
Airline reviews

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

10.0 ExcellentGordon, Jul 2025GEG - OAK
Read more Southwest reviews

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

The flight was comfortable with the exit row and great service

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

Boarded plane and then delayed 1.5 hours while on the plane

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

We were given vouchers we couldn’t use with a 5.5 hour delay

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Everything you need to know for your flight from Fresno to Ontario

Information on your arrival and departure airports

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