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Eureka

$141+ Cheap flights from Ontario (ONT) to Eureka, CA

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ACV
Jul 29 — Aug 51
Wed 7/29
Wed 8/5
1 adult, Economy
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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 June 29, 2026.

This United Airlines deal was found by Cheapflights users on 6/27. 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
Mon 8/177:09 am
ACV
-
ONT
1 stop5h 03m
United Airlines
Deal found 6/27$304
This United Airlines deal was found by Cheapflights users on 6/27. 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 7/116:00 am
ONT
-
ACV
1 stop5h 44m
United Airlines
Wed 7/156:00 am
ACV
-
ONT
1 stop6h 12m
United Airlines
Deal found 6/27$334
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:40 pm
ONT
-
ACV
1 stop19h 59m
Multiple Airlines
Sat 7/2512:19 pm
ACV
-
ONT
1 stop27h 35m
Multiple Airlines
Deal found 6/27$336
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 8/206:08 am
ONT
-
ACV
1 stop5h 28m
United Airlines
Thu 8/277:09 am
ACV
-
ONT
1 stop5h 03m
United Airlines
Deal found 6/28$358
This United Airlines deal was found by Cheapflights users on 6/26. 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 7/96:39 pm
ONT
-
ACV
1 stop5h 20m
United Airlines
Thu 7/166:44 pm
ACV
-
ONT
1 stop3h 53m
United Airlines
Deal found 6/26$364
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Wed 9/161:56 pm
ONT
-
ACV
1 stop6h 11m
United Airlines
Sat 9/198:00 am
ACV
-
ONT
1 stop4h 12m
United Airlines
Deal found 6/25$384
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Fri 8/71:50 pm
ONT
-
ACV
1 stop4h 13m
United Airlines
Mon 8/106:44 pm
ACV
-
ONT
1 stop3h 53m
United Airlines
Deal found 6/25$389
This United Airlines deal was found by Cheapflights users on 6/27. 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 7/21:50 pm
ONT
-
ACV
1 stop4h 13m
United Airlines
Sun 7/57:40 am
ACV
-
ONT
1 stop4h 32m
United Airlines
Deal found 6/27$409
This United Airlines deal was found by Cheapflights users on 6/26. 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 8/206:08 am
ONT
-
ACV
1 stop5h 28m
United Airlines
Sun 8/237:09 am
ACV
-
ONT
1 stop5h 03m
United Airlines
Deal found 6/26$429
This United Airlines deal was found by Cheapflights users on 6/25. 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.
Sat 7/186:00 am
ONT
-
ACV
1 stop5h 44m
United Airlines
Mon 7/207:40 am
ACV
-
ONT
1 stop4h 32m
United Airlines
Deal found 6/25$430

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 June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$304
(United Airlines)

One-way from

$141
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$473
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
One-way flight 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 June 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 June 29, 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

Fri 7/10

6:39 pm-11:59 pm

1 stop5h 20m

Arcata Eureka

Tue 7/14

7:40 am-12:12 pm

1 stop4h 32m

$364

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sat 11/14

1:52 pm-7:58 pm

1 stop6h 06m

Arcata Eureka

Tue 11/17

2:13 pm-8:06 pm

1 stop5h 53m

$384

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 8/20

6:08 am-11:36 am

1 stop5h 28m

Arcata Eureka

Sun 8/23

7:09 am-12:12 pm

1 stop5h 03m

$429

OntarioArcata

ONT - ACV

ONTACV

Ontario

Mon 8/10

6:00 am-11:42 am

1 stop5h 42m

Arcata Eureka

Wed 8/19

8:00 am-12:12 pm

1 stop4h 12m

$429

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 8/13

1:56 pm-8:07 pm

1 stop6h 11m

Arcata Eureka

Sun 8/16

8:00 am-12:12 pm

1 stop4h 12m

$429

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 8/20

6:08 am-11:36 am

1 stop5h 28m

Arcata Eureka

Sat 8/22

8:00 am-12:12 pm

1 stop4h 12m

$429

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 8/28

1:56 pm-8:07 pm

1 stop6h 11m

Arcata Eureka

Sun 9/6

7:09 am-12:12 pm

1 stop5h 03m

$444

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 10/1

6:00 am-12:08 pm

1 stop6h 08m

Arcata Eureka

Thu 10/8

4:00 pm-10:59 pm

1 stop6h 59m

$444

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sat 11/14

6:00 am-2:45 pm

1 stop8h 45m

Arcata Eureka

Tue 11/17

3:22 pm-4:58 pm

2 stops25h 36m

$468
Quickest round-trip

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 7/10

6:39 pm-11:59 pm

1 stop5h 20m

Arcata Eureka

Mon 7/13

2:05 pm-5:54 pm

1 stop3h 49m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 23 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 June 29, 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
9,894 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

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
9,894 reviews
United Airlines
7.4
Good
9,894 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Crew

8.1

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 5h 20m. 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

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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 June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$376FlexibilityNo cancel feeOn-time69%

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