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700 € Cheap Flights from Incheon International to Ontario International

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      Travellers and cabin class, 1 Adult, Economy

      Compare Incheon International to Ontario International flight deals

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

      Book the best Ontario International fare with no extra fees

      Flight deals from Incheon International to Ontario International

      Looking for a cheap last-minute deal or the best return flight from Incheon International Airport to Ontario International Airport? If you want to travel next month, return fares start from 839 €. Find the lowest prices on one-way and return tickets right here.
      Ontario.700 € per passenger.Departing Thu, 24 Dec, returning Sat, 2 Jan.Return flight with United.Outbound indirect flight with United, departs from Incheon International on Thu, 24 Dec, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sat, 2 Jan, arriving in Incheon International.Price includes taxes and charges.From 700 €, select.
      Ontario.709 € per passenger.Departing Wed, 23 Dec, returning Sun, 27 Dec.Return flight with United.Outbound indirect flight with United, departs from Incheon International on Wed, 23 Dec, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sun, 27 Dec, arriving in Incheon International.Price includes taxes and charges.From 709 €, select.
      Ontario.714 € per passenger.Departing Thu, 19 Nov, returning Sat, 10 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Incheon International on Thu, 19 Nov, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sat, 10 Apr, arriving in Incheon International.Price includes taxes and charges.From 714 €, select.
      Ontario.751 € per passenger.Departing Wed, 16 Dec, returning Fri, 19 Feb.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Wed, 16 Dec, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Fri, 19 Feb, arriving in Incheon International.Price includes taxes and charges.From 751 €, select.
      Ontario.752 € per passenger.Departing Wed, 16 Sep, returning Sun, 20 Sep.Return flight with United.Outbound indirect flight with United, departs from Incheon International on Wed, 16 Sep, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sun, 20 Sep, arriving in Incheon International.Price includes taxes and charges.From 752 €, select.
      Ontario.754 € per passenger.Departing Fri, 20 Nov, returning Sat, 20 Feb.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Fri, 20 Nov, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sat, 20 Feb, arriving in Incheon International.Price includes taxes and charges.From 754 €, select.
      Ontario.754 € per passenger.Departing Sat, 12 Dec, returning Thu, 11 Mar.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Sat, 12 Dec, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Thu, 11 Mar, arriving in Incheon International.Price includes taxes and charges.From 754 €, select.
      Ontario.757 € per passenger.Departing Tue, 24 Nov, returning Thu, 26 Nov.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Tue, 24 Nov, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Thu, 26 Nov, arriving in Incheon International.Price includes taxes and charges.From 757 €, select.
      Ontario.810 € per passenger.Departing Tue, 25 May, returning Wed, 26 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Tue, 25 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Wed, 26 May, arriving in Incheon International.Price includes taxes and charges.From 810 €, select.
      Ontario.810 € per passenger.Departing Sat, 12 Jun, returning Wed, 16 Jun.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Sat, 12 Jun, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Wed, 16 Jun, arriving in Incheon International.Price includes taxes and charges.From 810 €, select.
      Ontario.814 € per passenger.Departing Thu, 21 Jan, returning Thu, 8 Apr.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Thu, 21 Jan, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Thu, 8 Apr, arriving in Incheon International.Price includes taxes and charges.From 814 €, select.
      Ontario.814 € per passenger.Departing Wed, 24 Feb, returning Tue, 9 Mar.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Wed, 24 Feb, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Tue, 9 Mar, arriving in Incheon International.Price includes taxes and charges.From 814 €, select.
      Ontario.814 € per passenger.Departing Wed, 3 Mar, returning Sat, 13 Mar.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Wed, 3 Mar, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Sat, 13 Mar, arriving in Incheon International.Price includes taxes and charges.From 814 €, select.
      Ontario.818 € per passenger.Departing Tue, 27 Apr, returning Tue, 4 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Tue, 27 Apr, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Tue, 4 May, arriving in Incheon International.Price includes taxes and charges.From 818 €, select.
      Ontario.818 € per passenger.Departing Thu, 25 Mar, returning Tue, 6 Apr.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Thu, 25 Mar, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Tue, 6 Apr, arriving in Incheon International.Price includes taxes and charges.From 818 €, select.
      Ontario.818 € per passenger.Departing Sun, 23 May, returning Mon, 7 Jun.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Incheon International on Sun, 23 May, arriving in Ontario International.Inbound indirect flight with China Airlines, departs from Ontario International on Mon, 7 Jun, arriving in Incheon International.Price includes taxes and charges.From 818 €, select.

      Find the cheapest month to fly from Incheon International to Ontario International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Incheon International to Ontario International flights are currently cheapest in December.
      Sep
      from 752 €
      Oct
      from 839 €
      Nov
      from 757 €
      Dec
      from 709 €
      Jan
      from 933 €
      Feb
      from 820 €
      Mar
      from 814 €
      Apr
      from 871 €
      May
      from 810 €
      Jun
      from 810 €
      Jul
      from 931 €
      Aug
      from 929 €

      Incheon International to Ontario International: Alternative routes

      Compare routes from Incheon International 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 700 €
      Search flights

      San Bernardino Norton AFB

      39km from central Ontario
      Search flights

      Santa Ana John Wayne

      48km from central Ontario
      from 707 €
      Search flights

      Long Beach Municipal

      54km from central Ontario
      from 1.186 €
      Search flights

      Hawthorne

      65km from central Ontario
      Search flights

      Burbank

      67km from central Ontario
      from 619 €
      Search flights

      Los Angeles International

      71km from central Ontario
      Cheapest
      from 546 €
      Search flights

      Seoul to Ontario: Flight information

      The things to know before you go.
      Cheapest flight found700 €
      Cheapest month to flyDecember

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

      The best price we found for a return flight from Incheon International to Ontario International is 700 €. 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 Incheon International to Ontario International. But we found flights with one or more stops from 700 €.
      As of September 2026, there are no flights flying from Incheon International to Ontario International.
      The cheapest month to fly from Incheon International to Ontario International is usually December.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Incheon International Airport to Ontario International Airport on Thursday, 24 December 2026.
      No airlines currently offer direct flights between Incheon International 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, United offers the cheapest flight tickets to Ontario International.

      Flying from Incheon International Airport (ICN) to Ontario International Airport (ONT): what you need to know

      • Ontario is 17 hours behind Seoul and follows the UTC-8 timezone.

      • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to catch your ICN to ONT flight.

      • Flying during a peak time like August? Major public holidays and other popular periods can mean longer queues and delays at check-in and security. Play it safe and arrive up to four hours ahead of an international flight and two hours before domestic departures.

      • If you want to include a stop along the way, just deselect 'Direct flights only' when searching for your ticket from Incheon International Airport to Ontario International Airport. These are the top stopovers between ICN and ONT:

        • Seattle / Tacoma International Airport

        • Harry Reid International Airport

        • Honolulu International Airport

      How to find the cheapest flights from Incheon International Airport (ICN) to Ontario International Airport (ONT)

      • At the moment, 408 € is the cheapest price we've seen for a one-way Incheon International Airport to Ontario International Airport flight. The best price for a return ticket is 700 €. Keep in mind that fares can change due to availability when booking.

      • Don't wait until the last minute. You're more likely to find cheap tickets from ICN to ONT if you book ahead. Airlines often offer some excellent early bird discounts.

      • The 'Whole month' tool shows you the cheapest flights from Incheon International Airport to Ontario International Airport across each month. It's an easy way to find a bargain if your travel plans are flexible.

      • Save time searching for cheap flights from ICN to ONT by creating a Price Alert. We'll send you an email or notification on the app when a new discounted fare appears.

      • Select your ideal departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Incheon International Airport to Ontario International Airport.

      Handy information about Incheon International Airport (ICN)

      • Of all flights departing from Incheon International Airport, 74% arrive as scheduled at their destination.

      • Central Seoul to Incheon International Airport is around 48 kilometres. Depending on traffic, it'll take about 1 hour 5 minutes to get there if you're catching a taxi, ride-sharing or driving.

      • The trip when using public transport takes about 50 minutes.

      • Looking for a convenient hotel close to ICN? If you've booked an early flight from Incheon International Airport to Ontario International Airport, these accommodation options will have you moments from your departure gate:

      Arriving at Ontario International Airport (ONT)

      When to fly to Ontario International Airport (ONT)

      • It's time to pick your trip dates for your flight from Incheon International Airport to Ontario International Airport. July is the busiest month to head to Ontario. If you like a more laid-back vibe, go in March.

      • Book your flight from Incheon International Airport to Ontario International Airport for August if you want to go to Ontario during its warmest month. You can expect temperatures of between 16ºC (61ºF) and 36ºC (97ºF).

      • February has average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Search for cheap tickets from ICN to ONT around that time if you want to travel when it's cooler.

      Explore more of the United States

      • Ontario is easy to fall in love with, but there are so many other corners of the United States waiting to be discovered. About 56 kilometres west of Ontario, a trip to Los Angeles will keep you on the go. Start with leading attractions like Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

      • If there's time to check out another side of the United States, consider San Diego, about 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are among its highlights.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.