ONT - ICN

$525 Find Cheap Flights from Ontario to Seoul Incheon Airport

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 Incheon departing on 2/4. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Incheon Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Incheon, 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 Incheon, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ontario to Incheon Intl (ONT-ICN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Incheon Intl 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 Incheon

Sun, Oct 5 - Mon, Oct 13
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10:28 pm - 3:45 pmONT-ICN
49h 17m2 stops
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6:20 pm - 12:12 amICN-ONT
21h 52m1 stop
Mon, Sep 29 - Sun, Oct 12
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9:46 pm - 2:35 pmONT-ICN
48h 49m2 stops
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6:20 pm - 12:07 amICN-ONT
21h 47m1 stop
Mon, Sep 29 - Thu, Oct 9
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9:46 pm - 2:35 pmONT-ICN
48h 49m2 stops
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8:35 pm - 12:03 amICN-ONT
19h 28m1 stop
Mon, Nov 3 - Sun, Nov 16
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10:40 pm - 4:10 pmONT-ICN
48h 30m2 stops
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6:55 pm - 11:40 pmICN-ONT
21h 45m1 stop
Fri, Nov 7 - Mon, Nov 17
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10:40 pm - 4:10 pmONT-ICN
48h 30m2 stops
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6:55 pm - 11:50 pmICN-ONT
21h 55m1 stop
Fri, Oct 31 - Mon, Nov 10
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10:40 pm - 4:10 pmONT-ICN
49h 30m2 stops
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6:55 pm - 11:50 pmICN-ONT
21h 55m1 stop
Tue, Nov 4 - Mon, Nov 10
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8:00 am - 4:10 pmONT-ICN
39h 10m2 stops
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6:55 pm - 11:50 pmICN-ONT
21h 55m1 stop
Mon, Oct 13 - Mon, Oct 20
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6:05 am - 3:45 pmONT-ICN
41h 40m2 stops
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6:20 pm - 12:12 amICN-ONT
21h 52m1 stop
Fri, Mar 13 - Sat, Mar 21
China Airlines Logo
11:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$900China Airlines
Find Deal
Wed, Jan 14 - Fri, Jan 30
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$918China Airlines
Find Deal

Everything you should know

Cheapest round-trip
$671
Multiple Airlines
Sun 10/5Mon 10/13
ONT - ICN • 2 stops
Cheapest one-way
$525
China Airlines
Wed 2/4
ONT - ICN • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Incheon!
Booking Insights

KAYAK's insights & trends for Ontario to Incheon flights

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

What’s the cheapest day of the week to fly from Ontario to Seoul Incheon Airport?

The average price of all round-trip flights from Ontario to Incheon Intl Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seoul Incheon Airport on a Friday and more expensive on a Saturday. On your return trip to Ontario, you should consider flying back on a Friday, and avoid Wednesdays for better deals.

Good to know

Low seasonSeptember
Cheapest flight$525
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Ontario to Seoul Incheon Airport

When to book flights from Ontario to Incheon

Are your dates flexible? Find out the best times to travel from Ontario to Incheon 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 Ontario to Seoul Incheon Airport flights

  • What is the cheapest flight from Ontario to Incheon Intl Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Incheon Intl Airport was $525 for a one-way ticket and $671 for a round-trip.

  • Do I need a passport to fly between Ontario and Seoul Incheon Airport?

    A passport is required to fly from Ontario to Seoul Incheon Airport.

  • Which aircraft models fly most regularly from Ontario to Seoul Incheon Airport?

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

  • Which airline alliances offer flights from Ontario to Seoul Incheon Airport?

    SkyTeam, and oneworld are the airline alliances operating flights between Ontario and Seoul Incheon Airport, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Incheon, Korean Air or China Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Incheon are Korean Air and China Airlines. With an average price for the route of $1,257 and an overall rating of 8.4, Korean Air is the most popular choice. China Airlines is also a great choice for the route, with an average price of $1,062 and an overall rating of 8.3.

  • How does KAYAK find such low prices on flights from Ontario to Seoul Incheon Airport?

    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 Seoul Incheon Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul Incheon Airport 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 Seoul Incheon Airport?

    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 Seoul Incheon Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and ICN 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 Seoul Incheon Airport?

    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 Seoul Incheon Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Incheon

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Incheon. 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 Incheon? 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.
8.4
Korean AirOverall score based on 1139 reviews
8.1Food
8.3Comfort
8.5Boarding
8.2Entertainment
8.7Crew
Airline reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

8.0 ExcellentMatt, Aug 2025ATL - ICN
Read more Korean Air reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I normally love Korean Air, but this trip was not great. We boarded the plan and were settling into our seats. My son and I use these leg swings and we used it on the trip over to Cambodia, but on the way back the flight attendant very rudely told us we could not use it and that it was against regulations. I asked to see the regulation, but never saw it. The food on this trip was horrible as well, Even my son's kids meal was disgusting so we didn't eat anything on the flight. Thankfully we brought snacks. Entertainment - what happened to the games?

This was an amazing flight. The crew was great. The service was great. The food provided was great.

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

Not many people, so you can lay down on two seats

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Not great, will likely try to fly another or maybe I should have upgraded my ticket? Needed Air…

I don’t think I’ll be flying them again. Tight seats, no flowing air or air nozzles that you can turn air on you, for those who could have motion sickness this would be your worst nightmare. The pilot was great and experienced (which is what you want when flying 12 hours) overall I’m thankful knowledgeable pilots!

My ticket did not indication which group I was in for boarding; the gate attended help me

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

Information on your arrival and departure airports

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