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Ontario

$129+ Cheap flights from Fresno to Ontario (FAT - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Fresno to Ontario

Cheapest flights from Fresno to Ontario
Explore the most affordable flight options available from Fresno to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:54 pm
FAT
-
ONT
1 stop4h 13m
Multiple Airlines
Tue 4/147:44 pm
ONT
-
FAT
1 stop16h 33m
Multiple Airlines
Deal found 3/19$172
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:54 pm
FAT
-
ONT
1 stop18h 50m
Multiple Airlines
Thu 4/167:49 pm
ONT
-
FAT
1 stop19h 15m
Multiple Airlines
Deal found 3/18$175
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:07 pm
FAT
-
ONT
1 stop5h 42m
Multiple Airlines
Wed 4/227:44 pm
ONT
-
FAT
1 stop25h 50m
Multiple Airlines
Deal found 3/18$183
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:54 pm
FAT
-
ONT
1 stop18h 50m
Multiple Airlines
Fri 4/179:12 am
ONT
-
FAT
2 stops26h 05m
Multiple Airlines
Deal found 3/19$242
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:54 pm
FAT
-
ONT
1 stop4h 10m
Multiple Airlines
Sun 4/199:09 pm
ONT
-
FAT
1 stop16h 42m
Multiple Airlines
Deal found 3/19$249
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:54 pm
FAT
-
ONT
1 stop4h 10m
Multiple Airlines
Fri 4/249:12 am
ONT
-
FAT
2 stops26h 05m
Multiple Airlines
Deal found 3/20$259
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:37 pm
FAT
-
ONT
1 stop3h 55m
Multiple Airlines
Sun 5/313:30 pm
ONT
-
FAT
1 stop23h 17m
Multiple Airlines
Deal found 3/19$274
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:05 pm
FAT
-
ONT
2 stops20h 00m
Multiple Airlines
Wed 6/103:34 pm
ONT
-
FAT
1 stop26h 26m
Multiple Airlines
Deal found 3/20$288
This Southwest deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:30 am
FAT
-
ONT
2 stops7h 15m
Southwest
Wed 4/223:45 pm
ONT
-
FAT
2 stops5h 55m
Southwest
Deal found 3/18$297

Find flight deals from Fresno to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Fresno (FAT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$172
(Kiwi.com)

One-way from

$129
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$357
Provider with most accurate pricing for Fresno Airterminal-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Fresno Airterminal-Ontario flights.
Search Deals
From Fresno Airterminal to Ontario
Search Deals
One-way flight from Fresno Airterminal to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fresno to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Fresno to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 6/2

6:30 am-1:45 pm

2 stops7h 15m

Ontario

Wed 6/10

4:35 pm-10:15 pm

2 stops5h 40m

$297

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 5/13

9:55 am-10:34 pm

2 stops12h 39m

Ontario

Sat 5/16

6:45 am-4:35 pm

2 stops9h 50m

$345

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 4/7

7:18 am-12:20 pm

1 stop5h 02m

Ontario

Wed 4/8

1:27 pm-8:04 pm

1 stop6h 37m

$347

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Fri 5/15

12:39 pm-10:34 pm

2 stops9h 55m

Ontario

Tue 5/19

6:45 am-9:15 pm

2 stops14h 30m

$355

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 4/15

7:18 am-12:20 pm

1 stop5h 02m

Ontario

Tue 4/28

1:27 pm-6:19 pm

1 stop4h 52m

$357
Quickest round-trip

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 5/16

6:05 am-9:41 am

1 stop3h 36m

Ontario

Tue 5/19

1:30 pm-6:02 pm

1 stop4h 32m

$359

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 5/18

2:15 pm-5:52 pm

1 stop3h 37m

Ontario

Tue 5/19

1:30 pm-6:02 pm

1 stop4h 32m

$359

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Thu 5/7

2:33 pm-9:45 am

1 stop19h 12m

Ontario

Mon 5/11

7:59 pm-1:39 pm

1 stop17h 40m

$375

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Thu 5/7

6:20 pm-10:59 pm

1 stop4h 39m

Ontario

Mon 5/11

1:30 pm-7:43 pm

1 stop6h 13m

$381

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 5/2

6:05 am-9:41 am

1 stop3h 36m

Ontario

Thu 5/7

1:30 pm-7:43 pm

1 stop6h 13m

$381

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 23 resultsSorted by cheapest first
1
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Compare providers for flights from Fresno to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Fresno to Ontario in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Fresno-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Fresno-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Fresno-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Fresno-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Fresno-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Fresno to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Fresno with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Fresno to Ontario?

Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in March is currently the most expensive (average of $191). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated March 23, 2026.
Peruse reviews from past customers who have flown with Southwest and United Airlines from Fresno to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,462 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Fresno to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Fresno to Ontario?

    Airlines like Southwest, Delta, and United Airlines fly from Fresno to Ontario in about 5h 02m. The time it takes to get you to your destination can typically vary by up to 7h 37m. Fresno and Ontario are separated by a distance of 222 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Fresno to Ontario round-trip?

    Southwest, at $209, was found to be the cheapest airline from Fresno to Ontario. An alternate airline flying to your destination would be United Airlines. Southwest is priced at 42% lower than the current average price of a flight leaving 3 months from now.

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

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

  • How can I find direct flights from Fresno to Ontario?

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

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

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

  • What is the cheapest month to book a flight from Fresno to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Fresno to Ontario (average of $81). Flying from Fresno to Ontario in March is currently the most expensive (average of $191). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Fresno to Ontario

Discover the top 2 airlines that operate flights from Fresno to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$209Average$330FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$250Average$411FlexibilityNo cancel feeOn-time69%

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