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Cheap flight tickets from Eugene to Ontario International

Compare Eugene to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

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Flight deals from Eugene to Ontario International

Looking for a cheap last-minute deal or the best return flight from Eugene to Ontario International? Find the lowest prices on one-way and return tickets right here.
Ontario.RM775 per passenger.Departing Sat, 28 Feb, returning Tue, 3 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Eugene on Sat, 28 Feb, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Tue, 3 Mar, arriving in Eugene.Price includes taxes and charges.From RM775, select.
Ontario.RM777 per passenger.Departing Wed, 8 Apr, returning Sat, 11 Apr.Return flight with United.Outbound indirect flight with United, departs from Eugene on Wed, 8 Apr, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sat, 11 Apr, arriving in Eugene.Price includes taxes and charges.From RM777, select.
Ontario.RM947 per passenger.Departing Sat, 16 May, returning Mon, 18 May.Return flight with United.Outbound indirect flight with United, departs from Eugene on Sat, 16 May, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Mon, 18 May, arriving in Eugene.Price includes taxes and charges.From RM947, select.
Ontario.RM982 per passenger.Departing Sun, 15 Feb, returning Thu, 19 Feb.Return flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departs from Eugene on Sun, 15 Feb, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Thu, 19 Feb, arriving in Eugene.Price includes taxes and charges.From RM982, select.
Ontario.RM987 per passenger.Departing Fri, 6 Mar, returning Tue, 10 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Eugene on Fri, 6 Mar, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Tue, 10 Mar, arriving in Eugene.Price includes taxes and charges.From RM987, select.
Ontario.RM1,352 per passenger.Departing Tue, 14 Jul, returning Thu, 16 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Eugene on Tue, 14 Jul, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 16 Jul, arriving in Eugene.Price includes taxes and charges.From RM1,352, select.
Ontario.RM1,354 per passenger.Departing Mon, 24 Aug, returning Fri, 28 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Eugene on Mon, 24 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 28 Aug, arriving in Eugene.Price includes taxes and charges.From RM1,354, select.
Ontario.RM1,355 per passenger.Departing Fri, 4 Sep, returning Mon, 7 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Eugene on Fri, 4 Sep, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Mon, 7 Sep, arriving in Eugene.Price includes taxes and charges.From RM1,355, select.

Find the cheapest month to fly from Eugene to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Eugene to Ontario International flights are currently cheapest in April.
Feb
from RM982
Mar
from RM987
Apr
from RM777
May
from RM947
Jun
from RM1,561
Jul
from RM1,352
Aug
from RM1,354
Sep
from RM1,355
Oct
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Nov
Find prices
Dec
Find prices
Jan
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Eugene to Ontario International: Alternative routes

Compare routes from Eugene to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Ontario International

4km from central Ontario
Closest
from RM775
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San Bernardino Norton AFB

39km from central Ontario
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Santa Ana John Wayne

48km from central Ontario
Cheapest
from RM466
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Long Beach Municipal

54km from central Ontario
from RM886
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Hawthorne

65km from central Ontario
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Burbank

67km from central Ontario
from RM640
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Los Angeles International

71km from central Ontario
from RM578
Search flights

Eugene to Ontario: Flight information

The things to know before you go.
Cheapest flight foundRM775
Cheapest month to flyFebruary

Finding cheap flights from Eugene to Ontario International: Frequently asked questions

The best price we found for a return flight from Eugene to Ontario International is RM775. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Eugene to Ontario International. But we found flights with one or more stops from RM775.
As of February 2026, there are no flights flying from Eugene to Ontario International.
The cheapest month to fly from Eugene to Ontario International is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Eugene Airport to Ontario International Airport on Saturday, 28 February 2026.
No airlines currently offer direct flights between Eugene Airport and Ontario International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to Ontario International.

Travelling from Mahlon Sweet Field Airport (EUG) to Ontario International Airport (ONT): what you need to know

  • Ontario's timezone is UTC-7, which is the same as Eugene.

  • Your EUG to ONT flight won't wait if you're late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • Be prepared for longer lines in popular months like July. Arriving up to four hours ahead of an international flight and two hours for domestic departures will give you ample time for security and boarding.

  • We make it a piece of cake to book a flight with a stopover. To see your options for tickets from Mahlon Sweet Field Airport to Ontario International Airport, deselect 'Direct flights only.' Then, pick a flight that has a stop long enough to explore your chosen city. Some great stopovers between EUG and ONT include:

    • Metropolitan Oakland International Airport

    • Seattle-Tacoma International Airport

    • Phoenix Sky Harbour International Airport

How to find the cheapest flights from Mahlon Sweet Field Airport (EUG) to Ontario International Airport (ONT)

  • The lowest price we've seen for a one-way Mahlon Sweet Field Airport to Ontario International Airport flight is RM389. A round-trip ticket right now is RM775. Depending on the availability and when you book, these fares could change.

  • Don't wait until the last moment. You're more likely to get cheap tickets from EUG to ONT if you book in advance. Airlines often have some terrific early bird rates.

  • If you can be flexible with your travel plans, use the 'Whole month' search function. It'll give you the cheapest price in every month when looking for a flight from Mahlon Sweet Field Airport to Ontario International Airport.

  • Spend less time searching for cheap flights from EUG to ONT by creating a Price Alert. You'll receive an email or notification on the app when a lower fare pops up.

  • Tailor your flights with filters. Choose your preferred arrival and departure times, total journey duration and airlines. You can also sort your results by 'Best,' 'Cheapest' or 'Fastest' flights from Mahlon Sweet Field Airport to Ontario International Airport.

Handy information about Mahlon Sweet Field Airport (EUG)

  • The address for EUG is 28801 Douglas Dr.

  • Mahlon Sweet Field Airport earns top marks for on-time performance. 80.31% of flights that take off from EUG reach their destination on time.

  • Mahlon Sweet Field Airport is around 18 kilometres from central Eugene. If you're catching a cab, ride-sharing or driving from the centre, it'll take 20 minutes or so to get there, depending on the traffic.

  • Get your flight from Mahlon Sweet Field Airport to Ontario International Airport off to a relaxed start. Only a short drive from EUG, stay at Hampton Inn Eugene and you'll be well-rested for the trip ahead.

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport to the centre of Ontario has a drive time of about 10 minutes. It's approximately 6 kilometres away.

  • It takes around 1 hour 30 minutes to get there using public transport.

When to fly to Ontario International Airport (ONT)

  • August is the busiest month for flights from Mahlon Sweet Field Airport to Ontario International Airport. To avoid the crowds, travel to Ontario in May.

  • Book your flight from Mahlon Sweet Field Airport to Ontario International Airport for August if you'd like to visit Ontario during its warmest month. You can expect temperatures of between 15ºC (59ºF) and 35ºC (95ºF).

  • If you like cooler conditions, search for a cheap ticket from EUG to ONT in January. Average temperatures are between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • Ontario has its own special appeal, but there are so many other corners of United States just waiting to be explored. About 56 kilometres west of Ontario, a visit to Los Angeles will keep your itinerary packed. Check out popular attractions like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 153 kilometres south of Ontario, San Diego is another favourite stop in United States. No visit is complete without checking out San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.