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$264+ Cheap flights from Eureka, CA to Ontario (ONT)

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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
ACV — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Eureka to Ontario

Cheapest flights from Eureka to Ontario
Explore the most affordable flight options available from Eureka to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/16. 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 12/184:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Sat 1/176:32 pmONT - ACV
1 stop3h 57mUnited Airlines
Deal found 12/16$314
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/314:10 pmACV - ONT
1 stop6h 23mUnited Airlines
Mon 1/56:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Deal found 12/16$374
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/206:41 pmACV - ONT
1 stop4h 00mUnited Airlines
Sat 1/176:00 amONT - ACV
1 stop4h 52mUnited Airlines
Deal found 12/16$392
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/314:10 pmACV - ONT
1 stop6h 23mUnited Airlines
Sun 1/46:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Deal found 12/16$470
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/206:41 pmACV - ONT
1 stop4h 00mUnited Airlines
Mon 12/225:05 amONT - ACV
1 stop8h 23mUnited Airlines
Deal found 12/16$515
This United Airlines deal was found by Cheapflights users on 12/15. 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.
Tue 12/236:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Sat 12/275:05 amONT - ACV
1 stop8h 23mUnited Airlines
Deal found 12/15$540
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/2412:29 pmACV - ONT
1 stop8h 38mUnited Airlines
Fri 1/210:42 amONT - ACV
1 stop7h 05mUnited Airlines
Deal found 12/16$565
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/194:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Tue 12/235:05 amONT - ACV
1 stop8h 23mUnited Airlines
Deal found 12/16$615
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/214:10 pmACV - ONT
1 stop6h 31mUnited Airlines
Fri 1/210:42 amONT - ACV
1 stop7h 05mUnited Airlines
Deal found 12/16$635

Find flight deals from Eureka to Ontario

Keep the following information in mind while searching for Eureka to Ontario flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$334
(United Airlines)

One-way from

$264
(United Airlines)

Popular in

February

Cheapest in

July

Average price

$568
Provider with most accurate pricing for Arcata Eureka-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Arcata Eureka-Los Angeles flights.
Search Deals
From Eureka to Ontario
Search Deals
One-way flight from Eureka to Ontario
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($124 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 December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Eureka to Ontario 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 18, 2025.
Use the filters below to find and compare flights from Eureka to Ontario that are best for you.

Fly from

Eureka

Fly to

Ontario

Route

Depart

Return

Price

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sun 1/11

7:15 am-11:18 am

1 stop4h 03m

Ontario

Sun 2/1

6:00 am-11:24 am

1 stop5h 24m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 1/13

12:30 pm-8:58 pm

1 stop8h 28m

Ontario

Tue 1/20

6:00 am-10:52 am

1 stop4h 52m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sat 1/31

12:30 pm-8:58 pm

1 stop8h 28m

Ontario

Tue 2/3

5:05 am-1:26 pm

1 stop8h 21m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 1/8

2:09 pm-5:43 pm

1 stop3h 34m

Ontario

Thu 1/22

6:00 am-10:52 am

1 stop4h 52m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 1/6

7:15 am-12:17 pm

1 stop5h 02m

Ontario

Thu 1/15

6:00 am-10:52 am

1 stop4h 52m

$339

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 1/1

6:30 pm-10:41 pm

1 stop4h 11m

Ontario

Mon 1/5

6:39 pm-10:28 pm

1 stop3h 49m

$344

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sat 2/21

7:18 am-12:47 pm

1 stop5h 29m

Ontario

Sat 2/28

5:00 am-1:26 pm

1 stop8h 26m

$369

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Fri 2/6

12:30 pm-8:58 pm

1 stop8h 28m

Ontario

Sun 2/8

6:00 am-11:24 am

1 stop5h 24m

$384

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Fri 2/27

3:59 pm-12:47 pm

1 stop20h 48m

Ontario

Sun 3/1

6:09 am-12:19 pm

1 stop6h 10m

$431

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Fri 1/30

12:30 pm-12:47 pm

1 stop24h 17m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 19 results
1
2

Best time to book a flight from Eureka to Ontario

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

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

Currently, September is the cheapest month in which you can book a flight from Eureka to Ontario (average of $76). Flying from Eureka to Ontario in February is currently the most expensive (average of $199). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 18, 2025.
Get a feel of what it's like to fly with United Airlines from Eureka to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 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
9,091 reviews
United Airlines
7.4
Good
9,091 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 Eureka to Ontario. 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 into for flights to Ontario from Eureka?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Eureka. On average, Ontario has 0 inbound flights from Eureka per day from 1 airline. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • How long is the flight from Eureka to Ontario?

    There are many flights that can get you from Eureka to Ontario in 4h 03m. Fly via United Airlines to get the fastest option. There are 595 mi between Eureka and Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Eureka to Ontario 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 Eureka to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Eureka to Ontario (average of $76). Flying from Eureka to Ontario in February is currently the most expensive (average of $199). 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 Eureka to Ontario

Discover the top airline that operate flights from Eureka to Ontario. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$281Average$578FlexibilityNo cancel feeOn-time69%

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