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$78+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 September 16, 2025.

Round-trip from

$171
(Kiwi.com)

One-way from

$78
(Trip.com)

Popular in

August

Cheapest in

February

Average price

$436
From Fresno Airterminal to Ontario
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One-way flight from Fresno Airterminal to Ontario
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Highest demand for flights based on searches. 18% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/136:26 pmFAT - ONT
1 stop26h 16mMultiple Airlines
Mon 10/205:15 pmONT - FAT
1 stop17h 02mMultiple Airlines
Deal found 9/13$171
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Sun 9/219:58 pmFAT - ONT
1 stop9h 19mMultiple Airlines
Sun 10/2610:47 pmONT - FAT
1 stop8h 30mMultiple Airlines
Deal found 9/13$199
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 9/3011:09 amFAT - ONT
1 stop10h 47mMultiple Airlines
Sat 10/48:00 amONT - FAT
1 stop6h 29mMultiple Airlines
Deal found 9/15$213
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/208:07 amFAT - ONT
1 stop13h 58mMultiple Airlines
Thu 10/236:05 amONT - FAT
1 stop25h 11mMultiple Airlines
Deal found 9/15$217
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/12:32 pmFAT - ONT
1 stop21h 06mMultiple Airlines
Sat 10/48:00 amONT - FAT
1 stop6h 29mMultiple Airlines
Deal found 9/13$219
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/2910:39 amFAT - ONT
1 stop10h 17mMultiple Airlines
Fri 10/310:28 pmONT - FAT
1 stop11h 49mMultiple Airlines
Deal found 9/13$224
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/313:13 pmFAT - ONT
1 stop6h 42mMultiple Airlines
Sat 11/18:00 amONT - FAT
1 stop6h 29mMultiple Airlines
Deal found 9/13$225
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/12:32 pmFAT - ONT
1 stop7h 24mMultiple Airlines
Sat 10/111:37 pmONT - FAT
1 stop17h 55mMultiple Airlines
Deal found 9/12$228
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/108:01 amFAT - ONT
1 stop14h 04mMultiple Airlines
Mon 10/135:15 pmONT - FAT
1 stop17h 02mMultiple Airlines
Deal found 9/15$253

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 September 16, 2025.
Use the filters below to find and compare flights from Fresno to Ontario that are best for you.

Fly from

Fresno

Fly to

Ontario

Route

Depart

Return

Price

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sun 9/21

9:58 pm-7:17 am

1 stop9h 19m

Ontario

Sun 10/26

10:47 pm-7:17 am

1 stop8h 30m

$199

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 9/29

10:39 am-8:56 pm

1 stop10h 17m

Ontario

Fri 10/3

10:28 pm-10:17 am

1 stop11h 49m

$224

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 10/1

2:32 pm-9:56 pm

1 stop7h 24m

Ontario

Sat 10/11

1:37 pm-7:32 am

1 stop17h 55m

$228

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 11/24

7:15 pm-11:15 pm

1 stop4h 00m

Ontario

Fri 11/28

3:55 pm-11:10 pm

2 stops7h 15m

$283

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Wed 10/29

6:55 pm-10:51 pm

1 stop3h 56m

Ontario

Wed 12/3

6:00 am-10:14 am

1 stop4h 14m

$297

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 10/21

6:08 pm-10:52 pm

1 stop4h 44m

Ontario

Tue 11/11

6:00 am-10:14 am

1 stop4h 14m

$297

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 10/21

8:31 am-12:13 pm

1 stop3h 42m

Ontario

Wed 11/12

1:45 pm-5:58 pm

1 stop4h 13m

$297

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 10/6

6:08 pm-10:52 pm

1 stop4h 44m

Ontario

Tue 10/7

1:53 pm-5:51 pm

1 stop3h 58m

$302

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 11/25

6:55 pm-10:51 pm

1 stop3h 56m

Ontario

Fri 11/28

6:00 am-12:31 pm

1 stop6h 31m

$309

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 9/23

11:09 am-9:56 pm

1 stop10h 47m

$78

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 19 results
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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, August is the cheapest month in which you can book a flight from Fresno to Ontario (average of $246). Flying from Fresno to Ontario in March is currently the most expensive (average of $328). 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.

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

Find hourly flight availability from Fresno to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Fresno to Ontario in the afternoon. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight at noon.

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 September 16, 2025.
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
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

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.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

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.

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.

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

    Southwest, at $216, 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, August is the cheapest month in which you can book a flight from Fresno to Ontario (average of $246). Flying from Fresno to Ontario in March is currently the most expensive (average of $328). 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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Alternative routes for Fresno to Ontario

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$216Average$326FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$306Average$366FlexibilityNo cancel feeOn-time69%

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