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Eureka

$274+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — RDD
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from Ontario to Eureka

Keep the following information in mind while searching for Ontario to Eureka flight deals. Data was last updated septiembre 16, 2025.

Round-trip from

$314
(United Airlines)

One-way from

$274
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$414
From Ontario to Eureka
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One-way flight from Ontario to Eureka
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Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 septiembre 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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.
mié. 10/221:53 pmONT - ACV
1 stop4h 00mUnited Airlines
mié. 10/296:45 pmACV - ONT
1 stop4h 06mUnited Airlines
Deal found 9/15$314
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mié. 10/16:36 pmONT - ACV
1 stop3h 39mUnited Airlines
mié. 10/86:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/15$319
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 11/201:40 pmONT - ACV
1 stop4h 12mUnited Airlines
dom. 11/236:45 pmACV - ONT
1 stop4h 06mUnited Airlines
Deal found 9/15$344
This United Airlines deal was found by Cheapflights users on 9/14. 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.
sáb. 10/116:51 pmONT - ACV
1 stop16h 01mUnited Airlines
mié. 10/156:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/14$348
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 9/251:53 pmONT - ACV
1 stop4h 00mUnited Airlines
lun. 9/296:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/15$349
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 9/251:53 pmONT - ACV
1 stop4h 00mUnited Airlines
sáb. 9/276:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/15$374
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 10/146:36 pmONT - ACV
1 stop3h 39mUnited Airlines
vie. 10/174:00 pmACV - ONT
1 stop25h 40mUnited Airlines
Deal found 9/15$378
This United Airlines deal was found by Cheapflights users on 9/14. 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.
sáb. 9/276:51 pmONT - ACV
1 stop23h 02mUnited Airlines
mar. 9/306:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/14$388
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 12/116:00 amONT - ACV
1 stop4h 55mUnited Airlines
sáb. 12/132:15 pmACV - ONT
1 stop3h 22mUnited Airlines
Deal found 9/15$410
This United Airlines deal was found by Cheapflights users on 9/15. 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.
mié. 10/295:05 amONT - ACV
2 stops12h 47mUnited Airlines
sáb. 11/16:45 pmACV - ONT
1 stop4h 06mUnited Airlines
Deal found 9/15$414
This United Airlines deal was found by Cheapflights users on 9/15. 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.
vie. 9/261:53 pmONT - ACV
1 stop4h 00mUnited Airlines
mar. 9/306:45 pmACV - ONT
1 stop4h 07mUnited Airlines
Deal found 9/15$415

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 septiembre 16, 2025.
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

mié. 10/22

1:53 pm-5:53 pm

1 stop4h 00m

Arcata Eureka

mié. 10/29

6:45 pm-10:51 pm

1 stop4h 06m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

mié. 10/29

1:40 pm-5:52 pm

1 stop4h 12m

Arcata Eureka

sáb. 11/1

6:45 pm-10:51 pm

1 stop4h 06m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

mié. 10/1

6:36 pm-10:15 pm

1 stop3h 39m

Arcata Eureka

mié. 10/8

6:45 pm-10:52 pm

1 stop4h 07m

$319

OntarioArcata

ONT - ACV

ONTACV

Ontario

jue. 11/20

1:40 pm-5:52 pm

1 stop4h 12m

Arcata Eureka

dom. 11/23

6:45 pm-10:51 pm

1 stop4h 06m

$344

OntarioArcata

ONT - ACV

ONTACV

Ontario

sáb. 10/11

6:51 pm-10:52 am

1 stop16h 01m

Arcata Eureka

mié. 10/15

6:45 pm-10:52 pm

1 stop4h 07m

$348

OntarioArcata

ONT - ACV

ONTACV

Ontario

sáb. 11/8

6:00 am-10:55 am

1 stop4h 55m

Arcata Eureka

mar. 11/11

8:20 am-12:37 pm

1 stop4h 17m

$374

OntarioArcata

ONT - ACV

ONTACV

Ontario

mar. 10/14

6:36 pm-10:15 pm

1 stop3h 39m

Arcata Eureka

vie. 10/17

4:00 pm-5:40 pm

1 stop25h 40m

$378

OntarioArcata

ONT - ACV

ONTACV

Ontario

sáb. 9/27

6:51 pm-5:53 pm

1 stop23h 02m

Arcata Eureka

mar. 9/30

6:45 pm-10:52 pm

1 stop4h 07m

$388

OntarioArcata

ONT - ACV

ONTACV

Ontario

dom. 10/12

9:36 am-2:38 pm

1 stop5h 02m

$274

OntarioArcata

ONT - ACV

ONTACV

Ontario

mié. 10/8

1:53 pm-5:53 pm

1 stop4h 00m

$274

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 15 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, February is the cheapest month in which you can book a flight from Ontario to Eureka (average of $340). Flying from Ontario to Eureka in June is currently the most expensive (average of $498). 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 ONT to EU9?

Find hourly flight availability from Ontario to Eureka. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 16, 2025.

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

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 septiembre 16, 2025.
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
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

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 4h. 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.

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

    Currently, February is the cheapest month in which you can book a flight from Ontario to Eureka (average of $340). Flying from Ontario to Eureka in June is currently the most expensive (average of $498). 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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Alternative routes for Ontario to Eureka

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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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$279Average$402FlexibilityNo cancel feeOn-time69%

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