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$269+ Cheap flights from Eureka, CA to Ontario (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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.
RDD — ONT
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheap flight deals from Eureka to Ontario

Keep the following information in mind while searching for Eureka to Ontario flight deals. Data was last updated June 30, 2025.

Round-trip from

$316
(United Airlines)

One-way from

$269
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$459
From Eureka to Ontario
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One-way flight from Eureka to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 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 Eureka to Ontario

Cheapest flights from Eureka to Ontario
Explore the most affordable flight options available from Eureka to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

This United Airlines deal was found by Cheapflights users on 6/28. 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.
Thu 8/214:10 pmACV - ONT
1 stop4h 23mUnited Airlines
Mon 8/256:00 amONT - ACV
1 stop4h 49mUnited Airlines
Deal found 6/28$316

Cheapflights Fare Finder

Customize your flight search to find flights from Eureka 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 30, 2025.
Use the filters below to find and compare flights from Eureka to Ontario that are best for you.

Fly from

Eureka

Fly to

Ontario

Route

Depart

Return

Price

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 8/21

4:10 pm-8:33 pm

1 stop4h 23m

Ontario

Mon 8/25

6:00 am-10:49 am

1 stop4h 49m

$316

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Wed 7/23

2:19 pm-5:43 pm

1 stop3h 24m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Best time to book a flight from Eureka to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Eureka 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 Eureka to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Eureka to Ontario (average of $246). Flying from Eureka 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 EU9 to ONT?

Find hourly flight availability from Eureka 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 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Eureka to Ontario as you normally would.

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 30, 2025.
Get a feel of what it's like to fly with United Airlines from Eureka to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Overall

7.4

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
United Airlines
7.4
Good
8,852 reviews
United Airlines
7.4
Good
8,852 reviews

Entertainment

7.0

Overall

7.4

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.

Related info for your journey

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

  • What airport do you fly into for flights to Ontario from Eureka?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Eureka. On average, Ontario has 0 inbound flights from Eureka per day from 1 airline. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Eureka 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 Eureka to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Eureka to Ontario (average of $246). Flying from Eureka 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.

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Top airline flying from Eureka to Ontario

Discover the top airline that operate flights from Eureka 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$480FlexibilityNo cancel feeOn-time69%

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