FAT - ONT

$145 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 6/3. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheap Flight Deals 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.

Recent round-trip flight deals from Fresno to Ontario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Fresno to Ontario.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
United Airlines Logo
2:27 pm - 8:34 pmFAT-ONT
6h 07m1 stop
United Airlines Logo
6:48 pm - 10:21 pmONT-FAT
3h 33m1 stop
$268United Airlines
Find Deal
Fri, May 2 - Mon, May 5
Southwest Logo
2:50 pm - 6:50 pmFAT-ONT
4h 00m1 stop
Southwest Logo
5:45 am - 10:10 amONT-FAT
4h 25m1 stop
$281Southwest
Find Deal
Mon, May 12 - Thu, May 15
Southwest Logo
4:05 pm - 10:40 pmFAT-ONT
6h 35m2 stops
Southwest Logo
8:05 pm - 11:15 pmONT-FAT
3h 10m1 stop
$286Southwest
Find Deal
Wed, Jun 11 - Thu, Jun 12
United Airlines Logo
8:40 am - 12:24 pmFAT-ONT
3h 44m1 stop
United Airlines Logo
1:45 pm - 5:59 pmONT-FAT
4h 14m1 stop
$289United Airlines
Find Deal
Tue, May 13 - Wed, May 14
United Airlines Logo
2:05 pm - 5:39 pmFAT-ONT
3h 34m1 stop
United Airlines Logo
6:00 am - 10:05 amONT-FAT
4h 05m1 stop
$302United Airlines
Find Deal
Thu, May 29 - Tue, Jun 3
Alaska Airlines Logo
12:00 pm - 11:58 pmFAT-ONT
11h 58m1 stop
Alaska Airlines Logo
7:20 pm - 11:11 amONT-FAT
15h 51m1 stop
$312Alaska Airlines
Find Deal
Wed, May 14 - Fri, May 16
United Airlines Logo
2:25 pm - 8:21 pmFAT-ONT
5h 56m1 stop
United Airlines Logo
6:00 am - 9:48 amONT-FAT
3h 48m1 stop
$315United Airlines
Find Deal
Tue, Apr 22 - Sat, Apr 26
Southwest Logo
5:45 am - 12:35 pmFAT-ONT
6h 50m2 stops
Southwest Logo
5:45 am - 10:10 amONT-FAT
4h 25m1 stop
$316Southwest
Find Deal
Mon, May 12 - Thu, May 15
Delta Logo
12:45 pm - 10:43 pmFAT-ONT
9h 58m2 stops
Delta Logo
11:45 am - 9:32 pmONT-FAT
9h 47m2 stops
$334Delta
Find Deal
Wed, Apr 23 - Fri, Apr 25
Alaska Airlines Logo
8:20 am - 8:29 pmFAT-ONT
12h 09m1 stop
Alaska Airlines Logo
8:59 pm - 8:16 pmONT-FAT
23h 17m1 stop
$382Alaska Airlines
Find Deal
Wed, Apr 23 - Fri, Apr 25

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 July, where tickets cost $248 (return) on average. On the other hand, the most expensive months are September and August, where the average cost of round-trip tickets is $441 and $382 respectively.

Good to know

Low season

July

High season

October

Cheapest flight

$145
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 12% increase in price.
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 $145 for a one-way ticket and $268 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 $321 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 $357 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.

See more FAQs

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 4277 reviews
7.6Entertainment
8.2Boarding
8.0Comfort
7.1Food
8.7Crew
Airline reviews

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

10.0 ExcellentAnonymous, Mar 2025SNA - OAK
Read more Southwest reviews

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.

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 hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

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

The plane arrived 25 minutes late, and the Wi-Fi was slower than it usually is.

Forget beverage, they didn't even have water for half the passangers?

Can not wait for seating change to reduce the amount of pre boards - it’s disheartening the abuse. And then then deplaning

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Awful. Worst airline I have ever been on. Crew were among the rudest people I have ever dealt with. United staff members were rude and disrespectful. My flight was delayed, causing me to miss a connecting flight. I understand things happen, but when staff start lying about what actually happened, that is when I have an issue. Just be honest, really it isn’t that hard. I’m being very honest with this review and I don’t find this difficult what so ever. In fact, because of United Airlines, my Christmas holiday was off to a really rocky start. As someone who has traveled across the world, it has only been United that I have had a truly awful experience.

Boarding always seems a bit chaotic. Seat spacing could leave more for leg room.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

We arrived early and finally made it to our gate almost an hour after.

We were delayed 3x and because I didn’t purchase my tickets directly from United Airlines I was told I Have to take care of it myself so I called Underpricer and they helped me but before I changed my flights I took the risk of sticking by what my tickets were and was lucky to have gotten on the original all flight with only 15 mins before take off. not sure if I will do this again

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.