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Ontario

$244+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ACV — ONT
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
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 January 31, 2026.

This United Airlines deal was found by Cheapflights users on 1/30. 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 3/27:16 am
ACV
-
ONT
1 stop5h 22m
United Airlines
Sat 3/76:15 am
ONT
-
ACV
1 stop5h 39m
United Airlines
Deal found 1/30$334
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/17:16 am
ACV
-
ONT
1 stop5h 22m
United Airlines
Sat 3/76:15 am
ONT
-
ACV
1 stop5h 39m
United Airlines
Deal found 1/30$369
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 2/183:59 pm
ACV
-
ONT
1 stop6h 58m
United Airlines
Wed 2/256:09 am
ONT
-
ACV
1 stop6h 10m
United Airlines
Deal found 1/28$393
This Alaska Airlines deal was found by Cheapflights users on 1/29. 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 4/252:47 pm
ACV
-
ONT
1 stop18h 58m
Alaska Airlines
Sun 5/37:59 pm
ONT
-
ACV
1 stop18h 11m
Alaska Airlines
Deal found 1/29$398
This United Airlines deal was found by Cheapflights users on 1/29. 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 2/52:09 pm
ACV
-
ONT
1 stop3h 34m
United Airlines
Sun 2/86:00 am
ONT
-
ACV
1 stop5h 24m
United Airlines
Deal found 1/29$404
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 2/207:16 am
ACV
-
ONT
1 stop5h 22m
United Airlines
Mon 2/231:50 pm
ONT
-
ACV
1 stop8h 55m
United Airlines
Deal found 1/28$416
This United Airlines deal was found by Cheapflights users on 1/29. 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 1/307:15 am
ACV
-
ONT
1 stop4h 03m
United Airlines
Fri 2/65:05 am
ONT
-
ACV
1 stop8h 21m
United Airlines
Deal found 1/29$419
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 2/183:59 pm
ACV
-
ONT
1 stop6h 58m
United Airlines
Mon 2/235:00 am
ONT
-
ACV
1 stop8h 31m
United Airlines
Deal found 1/28$428
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/33:59 pm
ACV
-
ONT
2 stops28h 51m
United Airlines
Mon 3/96:15 am
ONT
-
ACV
1 stop4h 39m
United Airlines
Deal found 1/30$432
This United Airlines deal was found by Cheapflights users on 1/30. 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 1/3112:30 pm
ACV
-
ONT
1 stop8h 28m
United Airlines
Sun 2/15:05 am
ONT
-
ACV
1 stop8h 21m
United Airlines
Deal found 1/30$434
This United Airlines deal was found by Cheapflights users on 1/30. 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 3/52:14 pm
ACV
-
ONT
1 stop3h 27m
United Airlines
Mon 3/96:15 am
ONT
-
ACV
1 stop4h 39m
United Airlines
Deal found 1/30$435

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 January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$334
(United Airlines)

One-way from

$244
(United Airlines)

Popular in

November

Cheapest in

July

Average price

$349
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. 12% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 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 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 January 31, 2026.
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

Wed 3/4

2:13 pm-5:41 pm

1 stop3h 28m

Ontario

Sat 3/7

6:15 am-11:54 am

1 stop5h 39m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 3/17

7:16 am-12:18 pm

1 stop5h 02m

Ontario

Tue 3/24

6:15 am-10:54 am

1 stop4h 39m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 3/3

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Mon 3/9

6:15 am-10:54 am

1 stop4h 39m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 3/3

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Sat 3/7

6:15 am-11:54 am

1 stop5h 39m

$334

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 2/19

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Wed 2/25

6:09 am-12:19 pm

1 stop6h 10m

$369

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sun 2/22

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Mon 3/2

6:37 pm-10:45 pm

1 stop4h 08m

$369

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sun 3/1

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Sat 3/7

6:15 am-11:54 am

1 stop5h 39m

$369

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sun 3/1

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Mon 3/9

6:15 am-10:54 am

1 stop4h 39m

$369

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Fri 2/20

7:16 am-12:38 pm

1 stop5h 22m

Ontario

Tue 2/24

1:50 pm-2:39 pm

1 stop24h 49m

$393

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sat 4/25

2:47 pm-9:45 am

1 stop18h 58m

Ontario

Sun 5/3

7:59 pm-2:10 pm

1 stop18h 11m

$398

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 20 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 December is currently the most expensive (average of $239). 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 January 31, 2026.
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
9,219 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

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
9,219 reviews
United Airlines
7.4
Good
9,219 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

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 3h 28m. 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 December is currently the most expensive (average of $239). 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 Eureka to Ontario

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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 January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$281Average$557FlexibilityNo cancel feeOn-time69%

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