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$154+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
FAT — ONT
Apr 1 — Apr 81
Tue 4/1
Tue 4/8
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 March 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$255
(Southwest)

One-way from

$154
(United Airlines)

Popular in

September

Cheapest in

July

Average price

$357
Provider with most accurate pricing for Fresno Airterminal-Ontario flight deals.
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Provider most trusted by Cheapflights users for Fresno Airterminal-Ontario flights.
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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. 17% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 27, 2025.

This Southwest deal was found by Cheapflights users on 3/25. 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.
Mon 5/52:50 pmFAT - ONT
1 stop4h 00mSouthwest
Thu 5/88:10 amONT - FAT
1 stop5h 50mSouthwest
Deal found 3/25$255
This United Airlines deal was found by Cheapflights users on 3/25. 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 5/202:27 pmFAT - ONT
1 stop6h 07mUnited Airlines
Sun 5/256:00 amONT - FAT
1 stop4h 05mUnited Airlines
Deal found 3/25$311
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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.
Tue 4/228:56 amFAT - ONT
1 stop15h 02mAlaska Airlines
Tue 4/296:00 amONT - FAT
2 stops14h 16mAlaska Airlines
Deal found 3/25$328

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 27, 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

Mon 5/5

2:50 pm-6:50 pm

1 stop4h 00m

Ontario

Thu 5/8

8:10 am-2:00 pm

1 stop5h 50m

$255

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 5/20

2:27 pm-8:34 pm

1 stop6h 07m

Ontario

Sun 5/25

6:00 am-10:05 am

1 stop4h 05m

$311

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 4/22

8:56 am-11:58 pm

1 stop15h 02m

Ontario

Tue 4/29

6:00 am-8:16 pm

2 stops14h 16m

$328

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sun 6/22

6:05 pm-10:45 pm

1 stop4h 40m

$154

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Tue 4/22

8:56 am-8:29 pm

2 stops11h 33m

$187

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sat 4/12

4:05 pm-9:00 pm

1 stop4h 55m

$224

FresnoOntario

FAT - ONT

FATONT

Fresno Airterminal

Sun 5/11

5:30 am-3:32 pm

2 stops10h 02m

$555

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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, 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 $326). 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 March 27, 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 March 27, 2025.
To help decide which airline to fly from Fresno to Ontario, see what other customers have to say about Southwest, Alaska Airlines and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Food

7.1

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Food

7.1

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,795 reviews
Southwest
8.1
Very good
4,273 reviews

Food

7.1

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Food

7.1

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,273 reviews

Food

7.1

Overall

8.1

Crew

8.6

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 American Airlines. Southwest is priced at 22% 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 ($154), Alaska Airlines ($187), and Southwest ($224).

  • 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 $326). 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.

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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 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$231Average$321FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$286Average$357FlexibilityNo cancel feeOn-time69%
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