HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$269+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
RDD — ONT
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Eureka to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 9, 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.
Wed 12/314:10 pmACV - ONT
1 stop6h 23mUnited Airlines
Sat 1/175:05 amONT - ACV
1 stop8h 21mUnited Airlines
Deal found 12/7$359
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.
Sun 12/148:15 amACV - ONT
1 stop4h 03mUnited Airlines
Sun 12/216:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Deal found 12/7$374
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/134:10 pmACV - ONT
1 stop6h 39mUnited Airlines
Fri 12/196:39 pmONT - ACV
1 stop3h 49mUnited Airlines
Deal found 12/9$419
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 12/126:45 pmACV - ONT
1 stop4h 04mUnited Airlines
Sun 12/145:05 amONT - ACV
1 stop8h 25mUnited Airlines
Deal found 12/8$434
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.
Sun 12/216:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Mon 1/196:00 amONT - ACV
1 stop5h 24mUnited Airlines
Deal found 12/7$464
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.
Sun 12/216:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Tue 1/66:32 pmONT - ACV
1 stop3h 57mUnited Airlines
Deal found 12/7$470
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/148:15 amACV - ONT
1 stop4h 03mUnited Airlines
Wed 12/315:05 amONT - ACV
1 stop8h 23mUnited Airlines
Deal found 12/9$485
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 12/236:30 pmACV - ONT
1 stop4h 11mUnited Airlines
Fri 1/165:05 amONT - ACV
1 stop8h 21mUnited Airlines
Deal found 12/7$486
This United Airlines deal was found by Cheapflights users on 12/9. 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 12/178:15 amACV - ONT
1 stop4h 02mUnited Airlines
Sat 1/176:00 amONT - ACV
1 stop4h 52mUnited Airlines
Deal found 12/9$495
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 12/134:10 pmACV - ONT
1 stop20h 08mUnited Airlines
Sat 1/175:05 amONT - ACV
1 stop8h 21mUnited Airlines
Deal found 12/7$528
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 12/2512:29 pmACV - ONT
1 stop8h 38mUnited Airlines
Sat 1/36:00 amONT - ACV
1 stop4h 51mUnited Airlines
Deal found 12/7$535
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 12/92:15 pmACV - ONT
1 stop3h 22mUnited Airlines
Sat 12/136:00 amONT - ACV
1 stop8h 44mUnited Airlines
Deal found 12/7$553

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 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$314
(United Airlines)

One-way from

$269
(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 9, 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

Tue 3/17

12:35 pm-8:50 pm

1 stop8h 15m

Ontario

Thu 3/26

6:00 am-10:54 am

1 stop4h 54m

$314

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Fri 1/9

2:09 pm-5:43 pm

1 stop3h 34m

Ontario

Mon 1/12

6:00 am-11:24 am

1 stop5h 24m

$314

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 3/17

12:35 pm-8:50 pm

1 stop8h 15m

Ontario

Tue 3/24

6:00 am-10:54 am

1 stop4h 54m

$314

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Sat 1/31

12:30 pm-8:58 pm

1 stop8h 28m

Ontario

Tue 2/3

6:00 am-10:52 am

1 stop4h 52m

$314

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Tue 3/17

12:35 pm-8:50 pm

1 stop8h 15m

Ontario

Wed 3/25

6:00 am-10:54 am

1 stop4h 54m

$314

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Mon 3/16

2:14 pm-5:41 pm

1 stop3h 27m

Ontario

Tue 3/24

6:00 am-10:54 am

1 stop4h 54m

$359

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Mon 3/16

2:14 pm-5:41 pm

1 stop3h 27m

Ontario

Thu 3/26

6:00 am-10:54 am

1 stop4h 54m

$359

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Wed 12/31

4:10 pm-10:33 pm

1 stop6h 23m

Ontario

Sat 1/17

5:05 am-1:26 pm

1 stop8h 21m

$359

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 3/12

12:35 pm-8:50 pm

1 stop8h 15m

Ontario

Wed 3/25

6:00 am-10:54 am

1 stop4h 54m

$425

ArcataOntario

ACV - ONT

ACVONT

Arcata Eureka

Thu 3/5

12:35 pm-8:50 pm

1 stop8h 15m

Ontario

Fri 3/13

6:00 am-10:54 am

1 stop4h 54m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

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 9, 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
9,089 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

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
9,089 reviews
United Airlines
7.4
Good
9,089 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Overall

7.4

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 8h 15m. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Eureka to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Las Vegas flights
Los Angeles to San Francisco flights
San Francisco to Los Angeles flights
San Francisco to Ontario flights
Ontario to San Francisco flights
Los Angeles to Las Vegas flights
San Jose to Las Vegas flights
Burbank to Las Vegas flights
Santa Ana to Las Vegas flights
Santa Ana to San Francisco flights
Los Angeles to San Jose flights
San Jose to Los Angeles flights
San Francisco to Santa Ana flights
Oakland to Las Vegas flights
Sacramento to Los Angeles flights
Ontario to Las Vegas flights
San Francisco to San Diego flights
San Diego to Las Vegas flights
Sacramento to Las Vegas flights
Burbank to San Francisco flights
Los Angeles to Sacramento flights
San Francisco to Palm Springs flights
San Francisco to Burbank flights
Los Angeles to Reno flights
San Jose to San Diego flights
Sacramento to Ontario flights
San Diego to San Francisco flights
Las Vegas to San Francisco flights
Las Vegas to Los Angeles flights
San Jose to Ontario flights
San Jose to Santa Ana flights
Las Vegas to Burbank flights
Stockton to Las Vegas flights
Fresno to Las Vegas flights
Ontario to Sacramento flights
Las Vegas to Santa Ana flights
Sacramento to Santa Ana flights
Oakland to Ontario flights
Ontario to San Jose flights
Santa Ana to San Jose flights
Oakland to San Diego flights
Reno to Las Vegas flights
Reno to Los Angeles flights
Sacramento to San Diego flights
Las Vegas to San Diego flights
San Diego to San Jose flights
Oakland to Los Angeles flights
San Diego to Sacramento flights
Las Vegas to Ontario flights
Santa Rosa to Las Vegas flights

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 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$281Average$660FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.