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Eureka

$244+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — RDD
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
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 December 8, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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 12/166:00 amONT - ACV
1 stop4h 55mUnited Airlines
Wed 12/314:10 pmACV - ONT
1 stop6h 23mUnited Airlines
Deal found 12/7$310
This United Airlines deal was found by Cheapflights users on 12/5. 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 12/255:05 amONT - ACV
1 stop8h 23mUnited Airlines
Thu 1/14:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Deal found 12/5$329
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/96:00 amONT - ACV
1 stop4h 55mUnited Airlines
Fri 1/92:09 pmACV - ONT
1 stop3h 34mUnited Airlines
Deal found 12/8$374
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/306:00 amONT - ACV
1 stop4h 51mUnited Airlines
Mon 1/56:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Deal found 12/8$425
This United Airlines deal was found by Cheapflights users on 12/6. 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 12/2510:42 amONT - ACV
1 stop7h 05mUnited Airlines
Mon 12/294:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Deal found 12/6$432
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/125:05 amONT - ACV
1 stop8h 25mUnited Airlines
Sun 12/144:10 pmACV - ONT
1 stop6h 39mUnited Airlines
Deal found 12/8$434
This United Airlines deal was found by Cheapflights users on 12/5. 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 12/255:05 amONT - ACV
1 stop8h 23mUnited Airlines
Sun 1/47:14 amACV - ONT
1 stop26h 47mUnited Airlines
Deal found 12/5$459
This United Airlines deal was found by Cheapflights users on 12/6. 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 12/296:39 pmONT - ACV
1 stop16h 12mUnited Airlines
Mon 1/56:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Deal found 12/6$468
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/186:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Mon 12/294:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Deal found 12/7$470
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/276:00 amONT - ACV
1 stop4h 51mUnited Airlines
Sun 1/412:29 pmACV - ONT
1 stop8h 38mUnited Airlines
Deal found 12/7$489
This United Airlines deal was found by Cheapflights users on 12/5. 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 12/255:05 amONT - ACV
1 stop8h 23mUnited Airlines
Mon 1/52:10 pmACV - ONT
2 stops22h 37mUnited Airlines
Deal found 12/5$492
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/196:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Fri 12/264:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Deal found 12/8$500

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 December 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$244
(United Airlines)

Popular in

January

Cheapest in

August

Average price

$379
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. 11% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 8, 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

Thu 1/29

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Sun 2/1

7:15 am-11:18 am

1 stop4h 03m

$244

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 1/7

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Sat 1/10

7:15 am-12:17 pm

1 stop5h 02m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

Sat 1/17

5:05 am-1:26 pm

1 stop8h 21m

Arcata Eureka

Wed 1/21

2:09 pm-5:43 pm

1 stop3h 34m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 1/7

5:05 am-1:26 pm

1 stop8h 21m

Arcata Eureka

Wed 1/14

2:09 pm-5:43 pm

1 stop3h 34m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 1/28

5:05 am-1:26 pm

1 stop8h 21m

Arcata Eureka

Sat 1/31

12:30 pm-8:58 pm

1 stop8h 28m

$314

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 12/25

5:05 am-1:28 pm

1 stop8h 23m

Arcata Eureka

Mon 1/5

4:10 pm-10:41 pm

1 stop6h 31m

$329

OntarioArcata

ONT - ACV

ONTACV

Ontario

Thu 1/22

5:05 am-1:26 pm

1 stop8h 21m

Arcata Eureka

Fri 1/30

12:30 pm-8:58 pm

1 stop8h 28m

$359

OntarioArcata

ONT - ACV

ONTACV

Ontario

Fri 1/23

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Fri 1/30

12:30 pm-8:58 pm

1 stop8h 28m

$359

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 2/11

6:00 am-10:52 am

1 stop4h 52m

Arcata Eureka

Sun 2/15

1:00 pm-8:50 pm

1 stop7h 50m

$374

OntarioArcata

ONT - ACV

ONTACV

Ontario

Wed 12/31

6:00 am-10:51 am

1 stop4h 51m

Arcata Eureka

Mon 1/5

2:10 pm-5:43 pm

1 stop3h 33m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 21 results
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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 $83). Flying from Ontario to Eureka in February is currently the most expensive (average of $171). 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 December 8, 2025.

When flying from Ontario to Eureka, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 27% versus a flight at noon.

How much does it cost to fly round-trip from Ontario to Eureka?

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 December 8, 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
9,076 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

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
9,076 reviews
United Airlines
7.4
Good
9,076 reviews

Crew

8.1

Comfort

7.3

Overall

7.4

Boarding

7.7

Food

6.6

Entertainment

7.1

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 52m. 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, May is the cheapest month in which you can book a flight from Ontario to Eureka (average of $83). Flying from Ontario to Eureka in February is currently the most expensive (average of $171). 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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$267Average$383FlexibilityNo cancel feeOn-time69%

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