HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Eureka

$304+ Cheap flights from Ontario (ONT) to Eureka, CA

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ACV
Aug 14 — Aug 211
Fri 8/14
Fri 8/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Eureka with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Eureka

Cheapest flights from Ontario to Eureka
Explore the most affordable flight options available from Ontario to Eureka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 15, 2026.

This United Airlines deal was found by Cheapflights users on 7/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:56 pm
ONT
-
ACV
1 stop6h 11m
United Airlines
Wed 8/197:09 am
ACV
-
ONT
1 stop5h 03m
United Airlines
Deal found 7/15$304
This United Airlines deal was found by Cheapflights users on 7/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:00 am
ONT
-
ACV
1 stop6h 08m
United Airlines
Sun 10/117:45 am
ACV
-
ONT
1 stop4h 33m
United Airlines
Deal found 7/15$367
This United Airlines deal was found by Cheapflights users on 7/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:08 am
ONT
-
ACV
1 stop5h 28m
United Airlines
Sat 9/198:00 am
ACV
-
ONT
1 stop4h 12m
United Airlines
Deal found 7/13$384
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Sat 8/16:00 am
ONT
-
ACV
1 stop5h 44m
United Airlines
Thu 8/66:44 pm
ACV
-
ONT
1 stop3h 53m
United Airlines
Deal found 7/14$399
This United Airlines deal was found by Cheapflights users on 7/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:39 pm
ONT
-
ACV
1 stop4h 12m
United Airlines
Sat 8/16:00 am
ACV
-
ONT
1 stop6h 12m
United Airlines
Deal found 7/13$414
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/31:49 pm
ONT
-
ACV
1 stop4h 14m
United Airlines
Fri 8/76:44 pm
ACV
-
ONT
1 stop17h 28m
United Airlines
Deal found 7/10$432
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Fri 7/246:39 pm
ONT
-
ACV
1 stop5h 20m
United Airlines
Tue 7/286:00 am
ACV
-
ONT
1 stop6h 12m
United Airlines
Deal found 7/14$444
This Alaska Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 9/1510:47 am
ONT
-
ACV
2 stops27h 55m
Alaska Airlines
Tue 9/223:19 pm
ACV
-
ONT
1 stop27h 44m
Alaska Airlines
Deal found 7/12$448
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:00 am
ONT
-
ACV
1 stop5h 42m
United Airlines
Sat 8/86:00 am
ACV
-
ONT
1 stop6h 12m
United Airlines
Deal found 7/10$449
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:07 am
ONT
-
ACV
1 stop6h 01m
United Airlines
Fri 10/164:00 pm
ACV
-
ONT
1 stop25h 46m
United Airlines
Deal found 7/10$454

Find flight deals from Ontario to Eureka

Keep the following information in mind while searching for Ontario to Eureka flight deals. Data was last updated July 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$304
(United Airlines)

Popular in

February

Cheapest in

August

Average price

$561
Provider with most accurate pricing for Los Angeles-Arcata Eureka flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Arcata Eureka flights.
Search Deals
From Ontario to Eureka
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Eureka 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 July 15, 2026.
Use the filters below to find and compare flights from Ontario to Eureka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 8/13

1:56 pm-8:07 pm

1 stop6h 11m

Arcata Eureka

Wed 8/19

7:09 am-12:12 pm

1 stop5h 03m

$304

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 9/16

6:08 am-11:36 am

1 stop5h 28m

Arcata Eureka

Sat 9/19

8:00 am-12:12 pm

1 stop4h 12m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 8/6

6:00 am-11:42 am

1 stop5h 42m

Arcata Eureka

Mon 8/10

7:40 am-12:12 pm

1 stop4h 32m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sat 8/22

1:56 pm-5:50 pm

1 stop3h 54m

Arcata Eureka

Sun 9/6

2:08 pm-8:01 pm

1 stop5h 53m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 9/4

1:56 pm-8:07 pm

1 stop6h 11m

Arcata Eureka

Mon 9/7

8:00 am-12:12 pm

1 stop4h 12m

$384
Quickest round-trip

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sat 10/24

8:03 am-12:08 pm

1 stop4h 05m

Arcata Eureka

Sun 10/25

8:00 am-12:01 pm

1 stop4h 01m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 9/18

1:56 pm-8:07 pm

1 stop6h 11m

Arcata Eureka

Fri 9/25

6:00 am-12:18 pm

1 stop6h 18m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 9/3

1:56 pm-5:46 pm

1 stop3h 50m

Arcata Eureka

Mon 9/7

7:09 am-12:12 pm

1 stop5h 03m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sun 8/9

6:00 am-11:42 am

1 stop5h 42m

Arcata Eureka

Wed 8/19

7:09 am-12:12 pm

1 stop5h 03m

$429

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 9/1

12:00 pm-2:35 pm

1 stop26h 35m

Arcata Eureka

Sat 9/5

3:12 pm-8:24 pm

2 stops29h 12m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Ontario to Eureka

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

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Eureka

Get insights into the airlines that provide service to Eureka. 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 Eureka. Reviews last updated July 15, 2026.
Read reviews from past customers who have flown United Airlines from Ontario to Eureka. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,988 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

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
9,988 reviews
United Airlines
7.4
Good
9,988 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

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 Ontario to Eureka. 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 from for flights from Ontario to Eureka?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Eureka. You should not have trouble finding flights to Eureka from Ontario; the airport handles an average of 0 outbound flights to Eureka per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Ontario airport to Eureka. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Eureka?

    Airlines like United Airlines fly from Ontario to Eureka in about 6h 11m. The time it takes to get you to your destination can typically vary by up to . Ontario and Eureka are separated by a distance of 595 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Eureka by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Eureka

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Las Vegas flights
San Francisco to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
Ontario to San Francisco flights
San Francisco to Ontario flights
San Francisco to Santa Ana flights
Santa Ana to San Francisco flights
Santa Ana to Las Vegas flights
San Jose to Las Vegas flights
San Francisco to San Diego flights
Ontario to Las Vegas flights
Los Angeles to San Jose flights
San Jose to Los Angeles flights
Burbank to San Francisco flights
San Diego to Las Vegas flights
Burbank to Las Vegas flights
San Diego to San Francisco flights
San Francisco to Burbank flights
Los Angeles to Sacramento flights
Oakland to Las Vegas flights
Sacramento to Los Angeles flights
Sacramento to Las Vegas flights
Las Vegas to Los Angeles flights
Oakland to San Diego flights
San Jose to San Diego flights
Los Angeles to Reno flights
San Jose to Santa Ana flights
Reno to Las Vegas flights
Ontario to San Jose flights
Ontario to Sacramento flights
Fresno to Las Vegas flights
San Jose to Ontario flights
Las Vegas to Reno flights
Sacramento to Ontario flights
Santa Ana to San Jose flights
Sacramento to San Diego flights
San Francisco to Palm Springs flights
Stockton to Las Vegas flights
San Diego to San Jose flights
Las Vegas to San Francisco flights
Las Vegas to San Diego flights
Las Vegas to Santa Ana flights
Long Beach to Las Vegas flights
Ontario to Reno flights
Santa Rosa to Las Vegas flights
Las Vegas to Ontario flights
Santa Ana to Sacramento flights
Burbank to Sacramento flights
Sacramento to Burbank flights

Top airline flying from Ontario to Eureka

Discover the top airline that operate flights from Ontario to Eureka. 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 July 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$376FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights