ONT - SEL

$445 Find Cheap Flights from Ontario to Seoul

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 Seoul departing on 2/24. 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 Seoul

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Seoul, 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 Seoul, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$864
Typical prices: $1,379-$1,573
Multiple Airlines
Thu 11/27Thu 12/4
ONT - ICN • 1 stop
Cheapest one-way
$445
Multiple Airlines
Tue 2/24
ONT - ICN • 2 stops
Top airlines
China Airlines
Cheapest • from $919 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Seoul!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Seoul (ONT-SEL)

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

Thu, Nov 27 - Thu, Dec 4
Multiple Airlines Logo
9:59 pm - 8:30 pmONT-ICN
29h 31m1 stop
Multiple Airlines Logo
9:20 pm - 9:04 pmICN-ONT
40h 44m2 stops
$864Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
Multiple Airlines Logo
9:59 pm - 8:30 pmONT-ICN
29h 31m1 stop
Multiple Airlines Logo
9:20 pm - 9:04 pmICN-ONT
40h 44m2 stops
$871Multiple Airlines
Find Deal
Sat, Nov 29 - Fri, Dec 12
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 4:50 pmICN-ONT
37h 35m1 stop
$919China Airlines
Find Deal
Mon, Mar 2 - Mon, Mar 30
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:35 pm - 6:00 pmICN-ONT
21h 25m1 stop
$932China Airlines
Find Deal
Wed, Jan 7 - Fri, Feb 6
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
$945China Airlines
Find Deal
Fri, Nov 28 - Mon, Dec 1
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 4:50 pmICN-ONT
37h 35m1 stop
$951China Airlines
Find Deal
Fri, Jan 9 - Fri, Feb 6
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
$953China Airlines
Find Deal
Sun, Dec 7 - Sun, Dec 14
Multiple Airlines Logo
6:00 am - 5:20 amONT-ICN
30h 20m1 stop
Multiple Airlines Logo
9:00 pm - 11:29 pmICN-ONT
19h 29m1 stop
$1,041Multiple Airlines
Find Deal
Wed, Mar 25 - Fri, Apr 10
Alaska Airlines Logo
7:00 am - 6:35 pmONT-ICN
19h 35m2 stops
Alaska Airlines Logo
8:35 pm - 10:03 amICN-ONT
29h 28m2 stops
$1,078Alaska Airlines
Find Deal
Wed, Mar 25 - Fri, Apr 10
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
20h 35m1 stop
Alaska Airlines Logo
8:35 pm - 10:03 amICN-ONT
29h 28m2 stops
$1,114Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to Seoul flights

Get data-powered insights and trends into flights from Ontario to Seoul 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?

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

If your flying dates are flexible, you should consider flying to Seoul on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Ontario to Seoul. For your return ticket, we recommend flying on a Friday and avoiding Wednesdays for the best deals.

Good to know

Cheapest flight$445
Flight from Ontario to Seoul Incheon Airport

When to book flights from Ontario to Seoul

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

  • What is the cheapest flight from Ontario to Seoul?

    In the last 3 days, the lowest price for a flight from Ontario to Seoul was $445 for a one-way ticket and $864 for a round-trip.

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

    Yes, you’ll need a passport to travel to Seoul from Ontario.

  • Which airports will I be using when flying from Ontario to Seoul?

    When flying out of Ontario you will be using Ontario. You will be landing at one of these airports: Seoul Gimpo Intl or Incheon Intl.

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

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

  • Which airline alliances offer flights from Ontario to Seoul?

    SkyTeam is the only airline alliance operating flights between Ontario and Seoul.

  • Which is the best airline for flights from Ontario to Seoul, China Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Seoul are China Airlines and United Airlines. With an average price for the route of $1,098 and an overall rating of 8.3, China Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,393 and an overall rating of 7.4.

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

    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.

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

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

    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 with an airline and back to Ontario with another airline.

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

    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 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 Seoul

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Seoul. 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 Seoul? 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 1148 reviews
8.7Crew
8.5Boarding
8.3Comfort
8.2Entertainment
8.1Food
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.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

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

They need to improve on how the plane lands cause it was not smooth at all.

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. :)

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!

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

Information on your arrival and departure airports

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