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$155+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$255
(Southwest)

One-way from

$155
(United Airlines)

Popular in

May

Cheapest in

February

Average price

$315
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. 13% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/10. 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.
Tue 10/146:00 amFAT - ONT
1 stop4h 35mSouthwest
Wed 10/225:40 amONT - FAT
1 stop4h 00mSouthwest
Deal found 6/10$255
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:11 pmFAT - ONT
1 stop3h 41mUnited Airlines
Tue 7/221:19 pmONT - FAT
1 stop5h 11mUnited Airlines
Deal found 6/9$309
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:10 pmFAT - ONT
2 stops8h 46mAlaska Airlines
Fri 11/146:00 amONT - FAT
1 stop9h 41mAlaska Airlines
Deal found 6/12$368
This United deal was found by Cheapflights users on 6/11. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/156:45 amFAT - ONT
1 stop5h 29mMultiple Airlines
Tue 7/154:00 pmONT - FAT
1 stop6h 08mMultiple Airlines
Deal found 6/11$634
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/89:38 amFAT - ONT
2 stops12h 00mAmerican Airlines
Tue 7/226:15 amONT - FAT
2 stops17h 05mAmerican Airlines
Deal found 6/11$2,101

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 June 12, 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

Tue 10/14

6:00 am-10:35 am

1 stop4h 35m

Ontario

Wed 10/22

5:40 am-9:40 am

1 stop4h 00m

$255

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 7/8

7:11 pm-10:52 pm

1 stop3h 41m

Ontario

Tue 7/22

1:19 pm-6:30 pm

1 stop5h 11m

$309

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 11/10

3:10 pm-11:56 pm

2 stops8h 46m

Ontario

Fri 11/14

6:00 am-3:41 pm

1 stop9h 41m

$368

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 7/15

6:45 am-12:14 pm

1 stop5h 29m

Ontario

Tue 7/15

4:00 pm-10:08 pm

1 stop6h 08m

$634

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 7/8

9:38 am-9:38 pm

2 stops12h 00m

Ontario

Tue 7/22

6:15 am-11:20 pm

2 stops17h 05m

$2,101

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 7/29

2:17 pm-5:43 pm

1 stop3h 26m

$155

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Thu 6/26

8:41 am-4:18 pm

1 stop7h 37m

$165

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sun 8/24

11:53 am-9:26 am

1 stop21h 33m

$187

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Mon 6/23

3:35 pm-11:30 pm

2 stops7h 55m

$254

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 6/17

9:43 am-10:46 pm

2 stops13h 03m

$557

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
To help decide which airline to fly from Fresno to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 $255, was found to be the cheapest airline from Fresno to Ontario.Alternate airlines to your destination round-trip include United Airlines and Alaska Airlines. Southwest is priced at 28% lower than the current average price of a flight leaving 3 months from now.

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

    The cheapest airlines for a one-way flight from Fresno to Ontario are United Airlines ($155), Alaska Airlines ($187), and Southwest ($254).

  • 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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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$231Average$326FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$286Average$357FlexibilityNo cancel feeOn-time69%

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