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Eureka

$100+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ACV
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 January 21, 2026.

This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Fri 5/17:59 pm
ONT
-
ACV
1 stop18h 11m
Alaska Airlines
Thu 5/142:50 pm
ACV
-
ONT
1 stop9h 08m
Alaska Airlines
Deal found 1/20$270
This United Airlines deal was found by Cheapflights users on 1/18. 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 1/256:00 am
ONT
-
ACV
1 stop5h 24m
United Airlines
Sun 2/12:09 pm
ACV
-
ONT
1 stop3h 34m
United Airlines
Deal found 1/18$305
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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.
Sat 5/23:26 pm
ONT
-
ACV
1 stop22h 44m
Alaska Airlines
Sat 5/92:47 pm
ACV
-
ONT
1 stop7h 45m
Alaska Airlines
Deal found 1/20$309
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 4/146:00 am
ONT
-
ACV
1 stop8h 28m
Alaska Airlines
Sun 4/193:05 pm
ACV
-
ONT
1 stop8h 54m
Alaska Airlines
Deal found 1/20$315
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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 4/216:00 am
ONT
-
ACV
1 stop8h 28m
Alaska Airlines
Sat 4/252:47 pm
ACV
-
ONT
1 stop7h 45m
Alaska Airlines
Deal found 1/19$318
This United Airlines deal was found by Cheapflights users on 1/20. 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 2/176:10 am
ONT
-
ACV
1 stop6h 09m
United Airlines
Tue 2/242:13 pm
ACV
-
ONT
1 stop3h 28m
United Airlines
Deal found 1/20$335
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 4/146:00 am
ONT
-
ACV
1 stop8h 28m
Alaska Airlines
Sat 4/183:05 pm
ACV
-
ONT
1 stop8h 54m
Alaska Airlines
Deal found 1/20$338
This United Airlines deal was found by Cheapflights users on 1/19. 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 2/36:00 am
ONT
-
ACV
1 stop4h 52m
United Airlines
Sat 2/712:30 pm
ACV
-
ONT
1 stop8h 28m
United Airlines
Deal found 1/19$345
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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.
Sat 5/234:03 pm
ONT
-
ACV
1 stop22h 07m
Alaska Airlines
Wed 5/272:50 pm
ACV
-
ONT
1 stop9h 08m
Alaska Airlines
Deal found 1/21$355
This Alaska Airlines deal was found by Cheapflights users on 1/19. 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.
Fri 5/13:26 pm
ONT
-
ACV
1 stop22h 44m
Alaska Airlines
Sun 5/32:47 pm
ACV
-
ONT
1 stop18h 58m
Alaska Airlines
Deal found 1/19$358
This United Airlines deal was found by Cheapflights users on 1/18. 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 2/156:37 pm
ONT
-
ACV
1 stop4h 08m
United Airlines
Sun 2/227:16 am
ACV
-
ONT
1 stop5h 22m
United Airlines
Deal found 1/18$369

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 January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$305
(United Airlines)

One-way from

$100
(Kiwi.com)

Popular in

April

Cheapest in

August

Average price

$389
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. 8% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 21, 2026.
Use the filters below to find and compare flights from Ontario to Eureka that are best for you.

Fly from

Ontario

Fly to

Eureka

Route

Depart

Return

Price

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sun 1/25

6:00 am-11:24 am

1 stop5h 24m

Arcata Eureka

Sun 2/1

2:09 pm-5:43 pm

1 stop3h 34m

$305

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 4/14

6:00 am-2:28 pm

1 stop8h 28m

Arcata Eureka

Sun 4/19

3:05 pm-11:59 pm

1 stop8h 54m

$315

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 4/21

6:00 am-2:28 pm

1 stop8h 28m

Arcata Eureka

Sat 4/25

2:47 pm-10:32 pm

1 stop7h 45m

$318

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 4/14

6:00 am-2:28 pm

1 stop8h 28m

Arcata Eureka

Sat 4/18

3:05 pm-11:59 pm

1 stop8h 54m

$338

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 2/3

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Sat 2/7

12:30 pm-8:58 pm

1 stop8h 28m

$345

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 2/5

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Mon 2/9

6:00 am-11:18 am

1 stop5h 18m

$345

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sun 2/15

6:37 pm-10:45 pm

1 stop4h 08m

Arcata Eureka

Sun 2/22

7:16 am-12:38 pm

1 stop5h 22m

$369

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 3/13

6:15 am-10:54 am

1 stop4h 39m

Arcata Eureka

Mon 3/16

2:14 pm-5:41 pm

1 stop3h 27m

$370

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 1/30

5:05 am-1:26 pm

1 stop8h 21m

Arcata Eureka

Tue 2/3

2:09 pm-5:55 pm

1 stop3h 46m

$375

OntarioArcata

ONT - ACV

ONTACV

Ontario

Tue 3/24

4:49 pm-12:50 pm

1 stop20h 01m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 18 results
1
2

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

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

Currently, May is the cheapest month in which you can book a flight from Ontario to Eureka (average of $84). Flying from Ontario to Eureka in January is currently the most expensive (average of $214). 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.

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 January 21, 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
9,191 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

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
9,191 reviews
United Airlines
7.4
Good
9,191 reviews

Crew

8.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

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 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 and Alaska Airlines fly from Ontario to Eureka in about 5h 24m. The time it takes to get you to your destination can typically vary by up to 3h 04m. Ontario and Eureka are separated by a distance of 595 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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.

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

    Currently, May is the cheapest month in which you can book a flight from Ontario to Eureka (average of $84). Flying from Ontario to Eureka in January is currently the most expensive (average of $214). 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.

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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$249Average$372FlexibilityNo cancel feeOn-time69%

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