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770 € Cheap Flights from Ontario International to Seoul

Compare Ontario International to Seoul flight deals

Find the cheapest month or even day of the year to fly to Seoul

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Flight deals from Ontario International Airport to Seoul

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Seoul? If you want to travel next month, return fares start from 787 €. Find the lowest prices on one-way and return tickets right here.
Seoul.770 € per passenger.Departing Tue, 21 Apr, returning Tue, 2 Jun.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 21 Apr, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Tue, 2 Jun, arriving in Ontario International.Price includes taxes and charges.From 770 €, select.
Seoul.787 € per passenger.Departing Mon, 13 Apr, returning Wed, 22 Apr.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 13 Apr, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Wed, 22 Apr, arriving in Ontario International.Price includes taxes and charges.From 787 €, select.
Seoul.800 € per passenger.Departing Tue, 14 Apr, returning Thu, 21 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 14 Apr, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Thu, 21 May, arriving in Ontario International.Price includes taxes and charges.From 800 €, select.
Seoul.800 € per passenger.Departing Fri, 15 May, returning Wed, 20 May.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Fri, 15 May, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Wed, 20 May, arriving in Ontario International.Price includes taxes and charges.From 800 €, select.
Seoul.800 € per passenger.Departing Thu, 3 Sep, returning Thu, 17 Sep.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Thu, 3 Sep, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Thu, 17 Sep, arriving in Ontario International.Price includes taxes and charges.From 800 €, select.
Seoul.802 € per passenger.Departing Sun, 14 Feb, returning Sat, 20 Feb.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Sun, 14 Feb, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Sat, 20 Feb, arriving in Ontario International.Price includes taxes and charges.From 802 €, select.
Seoul.803 € per passenger.Departing Mon, 9 Nov, returning Tue, 8 Dec.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 9 Nov, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Tue, 8 Dec, arriving in Ontario International.Price includes taxes and charges.From 803 €, select.
Seoul.803 € per passenger.Departing Mon, 3 Aug, returning Fri, 4 Sep.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 3 Aug, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Fri, 4 Sep, arriving in Ontario International.Price includes taxes and charges.From 803 €, select.
Seoul.804 € per passenger.Departing Tue, 1 Dec, returning Tue, 8 Dec.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Tue, 1 Dec, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Tue, 8 Dec, arriving in Ontario International.Price includes taxes and charges.From 804 €, select.
Seoul.807 € per passenger.Departing Mon, 2 Nov, returning Thu, 19 Nov.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 2 Nov, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Thu, 19 Nov, arriving in Ontario International.Price includes taxes and charges.From 807 €, select.
Seoul.807 € per passenger.Departing Wed, 14 Oct, returning Thu, 19 Nov.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Wed, 14 Oct, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Thu, 19 Nov, arriving in Ontario International.Price includes taxes and charges.From 807 €, select.
Seoul.809 € per passenger.Departing Mon, 10 Aug, returning Thu, 27 Aug.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 10 Aug, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Thu, 27 Aug, arriving in Ontario International.Price includes taxes and charges.From 809 €, select.
Seoul.809 € per passenger.Departing Mon, 28 Sep, returning Wed, 14 Oct.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Mon, 28 Sep, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Wed, 14 Oct, arriving in Ontario International.Price includes taxes and charges.From 809 €, select.
Seoul.809 € per passenger.Departing Fri, 2 Oct, returning Fri, 16 Oct.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Fri, 2 Oct, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Fri, 16 Oct, arriving in Ontario International.Price includes taxes and charges.From 809 €, select.
Seoul.810 € per passenger.Departing Wed, 13 May, returning Wed, 3 Jun.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Wed, 13 May, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Wed, 3 Jun, arriving in Ontario International.Price includes taxes and charges.From 810 €, select.
Seoul.812 € per passenger.Departing Thu, 10 Sep, returning Tue, 10 Nov.Return flight with China Airlines.Outbound indirect flight with China Airlines, departs from Ontario International on Thu, 10 Sep, arriving in Incheon International.Inbound indirect flight with China Airlines, departs from Incheon International on Tue, 10 Nov, arriving in Ontario International.Price includes taxes and charges.From 812 €, select.

Find the cheapest month to fly from Ontario International to Seoul

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Seoul flights are currently cheapest in April.
Mar
from 1.486 €
Apr
from 787 €
May
from 800 €
Jun
from 1.025 €
Jul
from 995 €
Aug
from 809 €
Sep
from 800 €
Oct
from 809 €
Nov
from 807 €
Dec
from 804 €
Jan
from 853 €
Feb
from 802 €

Alternative Ontario International to Seoul routes

Looking for the cheapest, fastest or easiest route from Ontario International to Seoul? You could fly into the following airports instead.

Gimpo International

17km from central Seoul
Closest
from 957 €
Search flights

Incheon International

48km from central Seoul
Cheapest
from 770 €
Search flights

Ontario to Seoul: Flight information

The things to know before you go.
Cheapest flight found770 €
Cheapest month to flyApril

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

There are 2 airports in Seoul: Gimpo International and Incheon International.
The best price we found for a return flight from Ontario International to Seoul is 770 €. 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 Ontario International to Seoul. But we found flights with one or more stops from 770 €.
As of March 2026, there are no flights flying from Ontario International to Seoul.
The cheapest month to fly from Ontario International to Seoul is usually April.
If you're flying from Ontario International Airport, the cheapest airport near Seoul is Incheon International – which is 47.8 km away from the centre of Seoul. We've found flights into this airport from 770 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Seoul on Tuesday, 21 April 2026.
No airlines currently offer direct flights between Ontario International Airport and Seoul. 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 Seoul 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 Seoul is around 40 days in advance, so don’t leave your flight to the last minute.
In March, the average temperature is usually around 3°C. August is typically the warmest month in Seoul, when it usually averages around 28°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is July.
Currently, China Airlines offers the cheapest flight tickets to Seoul.

Travelling from Ontario International Airport (ONT) to Seoul: what you need to know

  • Ontario International Airport is located in Ontario. Following the UTC+9 timezone, Seoul is 16 hours ahead of Ontario.

  • To avoid rushing for your ONT to Seoul flight, allow plenty of time to check in and drop off your luggage. Turning up two hours before international departures and one hour before domestic flights is the general rule.

  • Taking off during a peak time like public or school holidays? Expect longer lines at security and check-in. For peace of mind, arrive up to four hours before international flights and two hours ahead of domestic departures.

  • Consider adding a stopover to potentially save on your plane ticket from ONT to Seoul. Just uncheck 'Direct flights only' during your search. Break up your trip (and maybe save some cash) by stopping at one of these connecting airports:

    • San Francisco International Airport (SFO)

    • Harry Reid Airport (formerly McCarran Airport) (LAS)

    • Daniel K. Inouye International Airport (HNL)

  • ONT is about 5 kilometres from central Ontario. If you're driving, catching a cab or ride-sharing from the centre, it'll take 10 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the trip time to be around 1 hour 30 minutes.

  • Looking for a hotel near ONT? If you're boarding an early flight from Ontario International Airport to Seoul, these accommodation options set you up for a seamless send-off:

  • Ontario International Airport scores top marks for on-time performance. 83.6% of flights that take off from ONT reach their destination without delay.

  • The address for ONT is 2900 E. Airport Drive.

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

  • The lowest price we've seen for a one-way Ontario International Airport to Seoul flight is 422 €. The cheapest price for a return flight is 770 €. Keep in mind fares may change due to demand at the time of booking.

  • Booking early is often the key to scoring a cheap flight from ONT to Seoul. Flight prices rise as demand increases, so the closer you get to departure, the more you'll likely spend on your ticket.

  • If you have flexibility with your travel plans, use the 'Whole month' search tool. It'll show you the lowest price across every month when looking for your Ontario International Airport to Seoul ticket.

  • Cut down on the time spent looking for cheap flights from ONT to Seoul by creating a Price Alert. We'll send you an email or notification through the app when a lower fare pops up.

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

Airports in Seoul

Incheon International Airport (ICN)

  • From Incheon International Airport (ICN), central Seoul is roughly 48 kilometres away.

  • If you're taking public transport, expect a journey time of around 1 hour 45 minutes.

  • If you're arriving on a late flight from Ontario International Airport to Seoul, few things beat the convenience of staying near the terminal. Grab your suitcases from the carousel and then be showered and snoozing soon after at one of these hotels near ICN:

  • Pick up an Incheon International Airport rental car and explore Seoul and beyond with your own set of wheels. WECAR, Hi Rent A Car and Alamo are top outlets you can book with here.

  • Lock in the lowest price by reserving your vehicle from Incheon International Airport about four weeks before your flight from ONT to Seoul.

Gimpo International Airport (GMP)

  • If you're staying in central Seoul (or just want to see the sights straight away), the city is around 16 kilometres from Gimpo International Airport (GMP). Keep an eye out for any visitor information kiosks to get directions after hopping off your flight from Ontario International Airport to Seoul.

  • You can expect the trip to take about 1 hour 5 minutes on public transport.

  • Following your ONT to Seoul flight, tuck yourself in at a hotel near GMP. These are some comfortable accommodation options that'll help you slip into relaxation mode:

  • Forget about public transport schedules or long cab queues. Grab a Gimpo International Airport rental car and let the journey unfold your way. Compare rates and availability from GOGO Rent a Car, Gogo Rental Car Seoul and Hi Rent A Car.

  • Avoid paying more than you need to. Reserving your ride one week before your arrival at GMP can land you a better rate.

Best time to go to Seoul

  • Travel to Seoul in peak season if you want a lively atmosphere, but remember that hotel prices tend to be higher. Alternatively, book flights from Ontario International Airport to Seoul in the off-season when prices are cheaper and crowds are smaller.

  • Before locking in your Ontario International Airport to Seoul plane ticket, think about the kind of weather forecast you're hoping for. August is the warmest month in Seoul, with temperatures ranging from 19ºC (66ºF) to 32ºC (90ºF).

  • Look for cheap tickets from ONT to Seoul in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -12ºC (10ºF) and 4ºC (39ºF) on average.

More about Seoul

  • After booking your flight from Ontario International Airport to Seoul, find a hotel that offers both comfort and a great location. Make one of these accommodation options your base for exploring Seoul:

  • There are so many things to see and do in this city it can be hard to work out where to begin. Bukchon Hanok Village, Gyeongbokgung Palace and N Seoul Tower are major attractions which should feature on any good Seoul itinerary.

Explore more of South Korea

  • Busan is just one of the many cities in South Korea waiting to be discovered after you've experienced Seoul. Around 322 kilometres away to the south-east, its top attractions include Haeundae Beach, Gamcheon Culture Village and Beomeosa Temple.

  • Around 241 kilometres south-east of Seoul, Daegu is another favourite stop in South Korea. Get a taste of what this destination has to offer at Duryu Park People's Garden, E-World and Apsan Park.

Plan the rest of your trip from Ontario to Seoul

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