$220 Cheap Flights from Ontario (ONT) to Eureka (ACV)

View $220 flight on Sun, Jun 22, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Ontario to Eureka (ONT-ACV)

Prices were available within the past 7 days and start at $220 for one-way flights and $244 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Aug 18 - Sat, Aug 23
ONT
Ontario
ACV
Eureka
$244 Roundtrip, found 9 hours ago
$244
Roundtrip
found 9 hours ago
Select United flight, departing Mon, Aug 18 from Ontario to Eureka, returning Sat, Aug 23, priced at $244 found 9 hours ago
United
Wed, May 7 - Wed, May 14
ONT
Ontario
ACV
Eureka
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 7 from Ontario to Eureka, returning Wed, May 14, priced at $249 found 1 day ago
United
Fri, Aug 22 - Mon, Aug 25
ONT
Ontario
ACV
Eureka
$256 Roundtrip, found 4 days ago
$256
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 22 from Ontario to Eureka, returning Mon, Aug 25, priced at $256 found 4 days ago
United
Wed, Jun 4 - Wed, Jun 11
ONT
Ontario
ACV
Eureka
$258 Roundtrip, just found
$258
Roundtrip
just found
Select United flight, departing Wed, Jun 4 from Ontario to Eureka, returning Wed, Jun 11, priced at $258 just found
United
Fri, May 30 - Mon, Jun 2
ONT
Ontario
ACV
Eureka
$262 Roundtrip, found 11 hours ago
$262
Roundtrip
found 11 hours ago
Select United flight, departing Fri, May 30 from Ontario to Eureka, returning Mon, Jun 2, priced at $262 found 11 hours ago
United
Tue, May 6 - Tue, May 13
ONT
Ontario
ACV
Eureka
$262 Roundtrip, found 1 day ago
$262
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 6 from Ontario to Eureka, returning Tue, May 13, priced at $262 found 1 day ago
United
Thu, May 29 - Sun, Jun 1
ONT
Ontario
ACV
Eureka
$268 Roundtrip, found 1 day ago
$268
Roundtrip
found 1 day ago
Select United flight, departing Thu, May 29 from Ontario to Eureka, returning Sun, Jun 1, priced at $268 found 1 day ago
United
Thu, Nov 13 - Tue, Nov 18
ONT
Ontario
ACV
Eureka
$269 Roundtrip, found 2 days ago
$269
Roundtrip
found 2 days ago
Select United flight, departing Thu, Nov 13 from Ontario to Eureka, returning Tue, Nov 18, priced at $269 found 2 days ago
United
Wed, Jun 4 - Wed, Jun 11
ONT
Ontario
ACV
Eureka
$272 Roundtrip, just found
$272
Roundtrip
just found
Select United flight, departing Wed, Jun 4 from Ontario to Eureka, returning Wed, Jun 11, priced at $272 just found
United
Thu, Aug 7 - Mon, Aug 11
ONT
Ontario
ACV
Eureka
$276 Roundtrip, found 1 day ago
$276
Roundtrip
found 1 day ago
Select United flight, departing Thu, Aug 7 from Ontario to Eureka, returning Mon, Aug 11, priced at $276 found 1 day ago
Flights from Ontario (ONT) to Eureka (ACV)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Arcata - Eureka
Airlines serving
United
Roundtrip price
$244
Distance
595 mi

Ontario to Eureka Flights

The cheapest times to fly from Ontario to Eureka

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Eureka are during the month of August. You can find some of the cheapest flights from Ontario to Eureka with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Ontario to Eureka

Sunday is one of the best days to book for cheap flights from Ontario to Eureka: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Ontario to Eureka

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Eureka in 2025. You can also book with separate airlines for your outbound and return journeys, from $220 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Eureka flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Eureka airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV) cost?
Discover the latest flight deals from ONT to ACV by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONT to ACV?
The cheapest flights from ONT to ACV are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV)?
There aren’t any direct flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Arcata - Eureka Airport (ACV). However, you’ll find other airports that have nonstop flights. Hop on your plane at Los Angeles Intl. Airport (LAX) and fly straight to Eureka without layovers.
What is the cheapest airline that flies from ONT to ACV?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ONT to ACV. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV)?
Nonstop flights from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel details and choose either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ONT to ACV?
You’ll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV)?
Opt for a flight from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV) last-minute?
Booking your ticket from ONT to ACV right before your journey is generally more expensive. But if you’re flexible with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an ONT to ACV flight and hotel package?
Compared with arranging hotels and flights separately, booking an ONT to ACV flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the stress out of travel planning. Simply secure your flights and select from our wide range of hotels, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Arcata - Eureka Airport (ACV)?
It’s usually possible to reschedule or cancel your ONT to ACV flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find further details on our Customer Service portal.

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*Available to One Key members.