$125 Cheap Flights from Ontario (ONT) to Eugene (EUG)

View $125 flight on Thu, Nov 6, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)

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Cheap Flights from Ontario to Eugene (ONT-EUG)

Prices were available within the past 7 days and start at $125 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Mon, Jan 26 - Fri, Feb 6
ONT
Ontario
EUG
Eugene
$227 Roundtrip, found 3 hours ago
$227
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Mon, Jan 26 from Ontario to Eugene, returning Fri, Feb 6, priced at $227 found 3 hours ago
Delta
Thu, Jan 29 - Mon, Feb 9
ONT
Ontario
EUG
Eugene
$227 Roundtrip, found 3 hours ago
$227
Roundtrip
found 3 hours ago
Select Delta flight, departing Thu, Jan 29 from Ontario to Eugene, returning Mon, Feb 9, priced at $227 found 3 hours ago
Delta
Tue, Jan 27 - Wed, Feb 11
ONT
Ontario
EUG
Eugene
$232 Roundtrip, found 3 hours ago
$232
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Jan 27 from Ontario to Eugene, returning Wed, Feb 11, priced at $232 found 3 hours ago
Delta
Fri, Feb 13 - Wed, Feb 18
ONT
Ontario
EUG
Eugene
$238 Roundtrip, found 1 day ago
$238
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Feb 13 from Ontario to Eugene, returning Wed, Feb 18, priced at $238 found 1 day ago
Hawaiian Airlines
Sat, Feb 14 - Fri, Feb 27
ONT
Ontario
EUG
Eugene
$242 Roundtrip, found 1 day ago
$242
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Feb 14 from Ontario to Eugene, returning Fri, Feb 27, priced at $242 found 1 day ago
Delta
Tue, Jan 27 - Fri, Jan 30
ONT
Ontario
EUG
Eugene
$243 Roundtrip, found 3 hours ago
$243
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Jan 27 from Ontario to Eugene, returning Fri, Jan 30, priced at $243 found 3 hours ago
Alaska Airlines
Fri, Nov 14 - Sat, Nov 15
ONT
Ontario
EUG
Eugene
$246 Roundtrip, found 1 hour ago
$246
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Fri, Nov 14 from Ontario to Eugene, returning Sat, Nov 15, priced at $246 found 1 hour ago
Alaska Airlines
Thu, Nov 6 - Mon, Nov 10
ONT
Ontario
EUG
Eugene
$246 Roundtrip, just found
$246
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Nov 6 from Ontario to Eugene, returning Mon, Nov 10, priced at $246 just found
American Airlines
Thu, Oct 30 - Tue, Nov 4
ONT
Ontario
EUG
Eugene
$249 Roundtrip, found 5 hours ago
$249
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Thu, Oct 30 from Ontario to Eugene, returning Tue, Nov 4, priced at $249 found 5 hours ago
United
Thu, Nov 6 - Mon, Nov 10
ONT
Ontario
EUG
Eugene
$249 Roundtrip, just found
$249
Roundtrip
just found
Select United flight, departing Thu, Nov 6 from Ontario to Eugene, returning Mon, Nov 10, priced at $249 just found

Find the cheapest month to fly from Ontario (ONT) to Eugene (EUG)

August is typically the cheapest month to fly

From $167 - $394 per traveler.

Alternative airports near Eugene

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Mahlon Sweet Field EUG. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $348
EUG
Mahlon Sweet Field
CheapestClosest
Average driving time to city center14 min
Flights from $348
Flights from Ontario (ONT) to Eugene (EUG)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Eugene
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$224
Distance
757 mi
Average flight time
3 hours 55 mins

Ontario to Eugene Flights

The cheapest times to fly from Ontario to Eugene

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Eugene are during the month of January. You can find some of the cheapest flights from Ontario to Eugene with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Eugene

Sunday is one of the best days to book for cheap flights from Ontario to Eugene: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Eugene

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Eugene in 2025. You can also book with separate airlines for your outbound and return journeys, from $125 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Eugene flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Eugene airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG) cost?
Snag a cheap one-way flight from $125 or cheap return flight from $227 from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
The cheapest month to fly from ONT to EUG is January, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
While Ontario, CA (ONT-Los Angeles - Ontario Intl.) doesn't have any direct flights to Mahlon Sweet Field Airport (EUG), other airports have nonstop routes. Taking off from Los Angeles Intl. Airport (LAX) will get you to Eugene without any detours.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
To find the cheapest airline flying from ONT to EUG, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
Direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ONT to EUG?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
To arrive at Mahlon Sweet Field Airport (EUG) without delays, pick a flight that leaves Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG) last-minute?
Last-minute fares from ONT to EUG are generally more expensive. To lock in the best rates, start searching for flights well ahead of time. That said, if you're flexible with your travel plans, you may find a cheap fare right before you leave.
Is it cheaper to book an ONT to EUG flight and hotel package?
You can save money by booking an ONT to EUG flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your ideal flights and accommodations, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Mahlon Sweet Field Airport (EUG)?
Typically, you can modify or cancel your ONT to EUG flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you need more information, visit our Customer Service portal.

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*Available to One Key members.