ONT - EUG

$99 Find Cheap Flights from Ontario to Eugene

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Eugene departing on 3/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Eugene

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Eugene, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Eugene, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$197
Overall average: $365
United Airlines
Sat 3/7Tue 3/10
ONT - EUG • 1 stop
Cheapest one-way
$99
Typical prices: $187-$230
Alaska Airlines
Tue 3/3
ONT - EUG • 1 stop
Top airlines
United Airlines
Cheapest • from $197 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
May
Cheapest • 21% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Eugene!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Eugene (ONT-EUG)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Eugene that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Eugene

Sat, Mar 7 - Tue, Mar 10
United Airlines Logo
6:37 pm - 11:08 pm
ONT
-
EUG
4h 31m
1 stop
United Airlines Logo
6:00 am - 12:18 pm
EUG
-
ONT
6h 18m
1 stop
$197United Airlines
Sat, Mar 7 - Tue, Mar 10
Delta Logo
6:00 am - 11:50 am
ONT
-
EUG
5h 50m
1 stop
Delta Logo
6:10 am - 4:28 pm
EUG
-
ONT
10h 18m
2 stops
$202Delta
Fri, May 1 - Tue, May 5
Delta Logo
2:20 pm - 5:04 pm
ONT
-
EUG
26h 44m
1 stop
Delta Logo
6:30 am - 11:13 am
EUG
-
ONT
4h 43m
1 stop
$220Delta
Sat, Mar 7 - Tue, Mar 10
Alaska Airlines Logo
7:00 am - 11:52 am
ONT
-
EUG
4h 52m
1 stop
Alaska Airlines Logo
9:01 am - 7:14 pm
EUG
-
ONT
10h 13m
2 stops
$225Alaska Airlines
Wed, Mar 4 - Sat, Mar 7
Alaska Airlines Logo
4:02 pm - 9:31 pm
ONT
-
EUG
5h 29m
1 stop
Alaska Airlines Logo
9:01 am - 3:08 pm
EUG
-
ONT
6h 07m
1 stop
$228Alaska Airlines
Sat, May 2 - Mon, May 4
Delta Logo
11:53 am - 5:04 pm
ONT
-
EUG
5h 11m
1 stop
Delta Logo
6:30 am - 5:15 pm
EUG
-
ONT
10h 45m
1 stop
$230Delta
Wed, Apr 29 - Tue, May 5
Delta Logo
1:29 pm - 11:10 pm
ONT
-
EUG
9h 41m
2 stops
Delta Logo
6:30 am - 11:13 am
EUG
-
ONT
4h 43m
1 stop
$233Delta
Wed, Mar 4 - Sat, Mar 7
Alaska Airlines Logo
12:02 pm - 6:21 pm
ONT
-
EUG
6h 19m
1 stop
Alaska Airlines Logo
5:20 am - 11:32 pm
EUG
-
ONT
18h 12m
2 stops
$235Alaska Airlines
Sat, Feb 28 - Mon, Mar 2
United Airlines Logo
5:00 am - 1:06 pm
ONT
-
EUG
8h 06m
1 stop
United Airlines Logo
2:08 pm - 7:54 pm
EUG
-
ONT
5h 46m
1 stop
$240United Airlines
Sat, Feb 28 - Mon, Mar 2
Delta Logo
6:00 am - 11:50 am
ONT
-
EUG
5h 50m
1 stop
Delta Logo
11:25 am - 11:49 pm
EUG
-
ONT
12h 24m
2 stops
$245Delta
Booking Insights

KAYAK's insights & trends for Ontario to Eugene flights

Get data-powered insights and trends into flights from Ontario to Eugene to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Eugene?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Eugene, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Eugene is May, where tickets cost $262 (return) on average. On the other hand, the most expensive months are June and February, where the average cost of round-trip tickets is $405 and $379 respectively.

Good to know

Low seasonJune
Cheapest flight$99
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Ontario to Eugene

When to book flights from Ontario to Eugene

Are your dates flexible? Find out the best times to travel from Ontario to Eugene based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Eugene

  • What are some common layovers for flights from Ontario to Eugene?

    Flights from Ontario to Eugene typically have one or two stops in various cities which are dependent on the airline you opt for. Some of these layovers include Seattle (SEA), San Francisco (SFO), Salt Lake City (SLC), Phoenix (PHX), Las Vegas (LAS), and Oakland (OAK).

  • What is the luggage allowance on flights from Ontario to Eugene with Alaska Airlines?

    The luggage allowance on flights from Ontario to Eugene with Alaska Airlines varies depending on the fare type chosen by the passenger. For the saver fare, passengers are allowed to bring one personal item and one carry-on bag for free. Checked luggage will incur a fee. For the main fare, passengers are allowed to bring one personal item, one carry-on bag, and two checked bags for free. Any additional bags will incur a fee of $100 each.

  • Which airlines offer flights from Ontario to Eugene with lower carbon emissions?

    Delta is committed to reducing its carbon emissions and has implemented several measures to achieve this goal. The airline has made significant investments in modernizing its fleet by retiring older, less fuel-efficient aircraft and replacing them with newer, more environmentally-friendly planes including for flights from Ontario to Eugene.

  • Does United Airlines allow advanced seat selection for flights from Ontario to Eugene?

    United Airlines allows advanced seat selection for flights from Ontario to Eugene. Economy and Economy Plus fares both offer advanced seat selection options. Passengers in these fare classes can select their seats at the time of booking or during the check-in process free of charge.

  • What is the cheapest flight from Ontario to Eugene?

    In the last 3 days, the lowest price for a flight from Ontario to Eugene was $99 for a one-way ticket and $197 for a round-trip.

  • Do I need a passport to fly between Ontario and Eugene?

    No

  • Which aircraft models fly most regularly from Ontario to Eugene?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Eugene?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Ontario and Eugene, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Eugene, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Eugene are Southwest and Alaska Airlines. With an average price for the route of $365 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $324 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Ontario to Eugene?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Eugene.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Eugene?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Eugene from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Eugene?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Eugene with an airline and back to Ontario with another airline. Booking your flights between Ontario and EUG can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Eugene?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Eugene from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Eugene

  • Pet owners looking for pet-friendly flights from Ontario (ONT) to Eugene (EUG) can book with Southwest Airlines. Southwest accepts only dogs and cats, and the animals must be at least 8 weeks old. The combined weight of the pet and carrier must not exceed 20 lb.
  • Ontario International Airport (ONT) has two terminals. Terminal 2 serves all domestic flights operated by Southwest Airlines. It has 14 gates, numbered 201 to 214. Terminal 4 handles all international and some domestic flights, including those operated by Delta, American Airlines, Alaska Airlines, and United. It has 14 gates, numbered 401 to 414.
  • American Airlines offers priority boarding for families with children under two years of age on flights from Ontario (ONT) to Eugene (EUG). The airline offers a range of in-flight entertainment options and also offers child-friendly entertainment options with a dedicated Kids Zone category that includes animated movies and games.
  • Alaska Airlines provides wheelchair assistance for passengers with reduced mobility at the airport. Passengers can request a wheelchair when booking their ticket. The airline also offers special seating accommodations on flights from Ontario (ONT) to Eugene (EUG) and arrangements may include seats with additional leg space or bulkhead seating.
  • Eugene Airport (EUG) is located about 7 miles northwest of the city center. The Lane Transit District (LTD) bus service operates various routes around Eugene, including to and from the airport. Passengers can catch the bus outside of the terminal building. The Route 95 bus runs from the airport to the downtown Eugene bus station with stops at various locations. Taxis are also available outside the terminal.

Reviews of the top 4 airlines serving from Ontario to Eugene

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Eugene. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Eugene? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11848 reviews
8.1Boarding
7.0Entertainment
7.8Comfort
7.1Food
8.5Crew
Airline reviews

The Alaska Airlines app made it very difficult to find my boarding pass. It was very frustrating to use! The flight itself was flawless.

8.0 ExcellentMatt, Jan 2026
SFO - PDX
Read more Alaska Airlines reviews

The Alaska Airlines app made it very difficult to find my boarding pass. It was very frustrating to use! The flight itself was flawless.

You need categories to denote when food and entertainment are not available.

Alaska is a great airline. Unfortunately, our flight was canceled in a really late hour and it caused a lot of hardship in my travel process.

More comfortable than the flight to Los Angeles. But food was mediocre again. Attendants kind and courteous.

The snack pretzels have garlic. just use normal pretzels. Tomatoijuice instead of only bloody mary mix

I haven’t flown in over 20 years and had my grandkids, so I had lots of questions. They were very polite and helpful . Thank you.

No accommodation or credit offered for cancelled layover flight to Eugene from portland

I've never flied them before but liked them. Weather was bad so a little scarey but they did a great job landing.

If they actually let me fly. I was rerouted to United and there was no Alaska airlines reps at all. Then the lady who worked the delta counter told me to go away and figure things out myself. Horrible experience.

Kayak I had marked one carry on, one checked bag. Yet when it completed the purchase marked it as no carry on. Fail on kayaks side! Then extended flight delayed due to computer issues. Crew of the plane did awesome but fail on both kayak and alaskan

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

Everything you need to know for your flight from Ontario to Eugene

Information on your arrival and departure airports