$78 Cheap Flights from Ontario (ONT) to Eugene (EUG)

View $78 flight on Tue, Sep 2, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Ontario to Eugene (ONT-EUG)

Prices were available within the past 7 days and start at $78 for one-way flights and $171 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Mon, Aug 4 - Tue, Aug 5
ONT
Ontario
EUG
Eugene
$171 Roundtrip, found 1 hour ago
$171
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Aug 4 from Ontario to Eugene, returning Tue, Aug 5, priced at $171 found 1 hour ago
Southwest Airlines
Mon, Aug 4 - Tue, Aug 5
ONT
Ontario
EUG
Eugene
$181 Roundtrip, found 1 hour ago
$181
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Aug 4 from Ontario to Eugene, returning Tue, Aug 5, priced at $181 found 1 hour ago
Southwest Airlines
Mon, Aug 4 - Tue, Aug 5
ONT
Ontario
EUG
Eugene
$206 Roundtrip, found 1 hour ago
$206
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Aug 4 from Ontario to Eugene, returning Tue, Aug 5, priced at $206 found 1 hour ago
Southwest Airlines
Thu, Sep 25 - Sun, Sep 28
ONT
Ontario
EUG
Eugene
$210 Roundtrip, found 1 hour ago
$210
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Thu, Sep 25 from Ontario to Eugene, returning Sun, Sep 28, priced at $210 found 1 hour ago
Southwest Airlines
Mon, Aug 4 - Tue, Aug 5
ONT
Ontario
EUG
Eugene
$216 Roundtrip, found 1 hour ago
$216
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Aug 4 from Ontario to Eugene, returning Tue, Aug 5, priced at $216 found 1 hour ago
Delta
Wed, Oct 1 - Fri, Oct 31
ONT
Ontario
EUG
Eugene
$219 Roundtrip, found 6 days ago
$219
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Oct 1 from Ontario to Eugene, returning Fri, Oct 31, priced at $219 found 6 days ago
Delta
Fri, Oct 31 - Tue, Nov 4
ONT
Ontario
EUG
Eugene
$223 Roundtrip, found 5 days ago
$223
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Oct 31 from Ontario to Eugene, returning Tue, Nov 4, priced at $223 found 5 days ago
United
Wed, Aug 20 - Tue, Aug 26
ONT
Ontario
EUG
Eugene
$232 Roundtrip, found 17 hours ago
$232
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Aug 20 from Ontario to Eugene, returning Tue, Aug 26, priced at $232 found 17 hours ago
American Airlines
Wed, Aug 20 - Tue, Aug 26
ONT
Ontario
EUG
Eugene
$237 Roundtrip, found 17 hours ago
$237
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Wed, Aug 20 from Ontario to Eugene, returning Tue, Aug 26, priced at $237 found 17 hours ago
Alaska Airlines
Sat, Aug 2 - Tue, Aug 5
ONT
Ontario
EUG
Eugene
$245 Roundtrip, found 4 days ago
$245
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Aug 2 from Ontario to Eugene, returning Tue, Aug 5, priced at $245 found 4 days ago

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

September is typically the cheapest month to fly

From $178 - $491 per traveler.

Graph displaying average flight prices per month

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
$170
Distance
757 mi

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 August. 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 $78 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?
Discover the latest flight deals from ONT to EUG by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ONT to EUG?
The cheapest flights from ONT to EUG are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
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 ONT to EUG?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ONT to EUG. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.

Explore a world of travel with Expedia

*Available to One Key members.