ONT - SEL

$400 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 4/9. 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, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$812
China Airlines
Fri 5/8Tue 5/19
ONT - ICN • 1 stop
Cheapest one-way
$400
Multiple Airlines
Thu 4/9
ONT - ICN • 2 stops
Top airlines
China Airlines
Cheapest • from $812 (round-trip)
China Airlines
Best reviews • 8.3 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Seoul. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Hong Kong (HKG)
Cheapest • Avg $733 (round-trip)
San Francisco (SFO)
Shortest trip • 17h 24m (one-way)
Insights
Insights
Insights
Insights
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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 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

Fri, May 8 - Tue, May 19
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$812China Airlines
Mon, Apr 13 - Tue, Apr 28
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$815China Airlines
Mon, Apr 13 - Thu, Apr 23
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$837China Airlines
Tue, Apr 21 - Sun, May 31
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$841China Airlines
Mon, May 18 - Wed, May 27
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$844China Airlines
Tue, Mar 17 - Thu, Jun 4
China Airlines Logo
11:50 pm - 7:15 pm
ONT
-
ICN
27h 25m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$854China Airlines
Sun, Mar 15 - Thu, Mar 26
China Airlines Logo
11:50 pm - 11:20 am
ONT
-
ICN
19h 30m
1 stop
China Airlines Logo
12:30 pm - 5:50 pm
ICN
-
ONT
21h 20m
1 stop
$855China Airlines
Thu, Apr 30 - Sun, May 10
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$856China Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
11:59 pm - 9:15 pm
ONT
-
GMP
29h 16m
2 stops
Multiple Airlines Logo
8:00 am - 6:37 pm
GMP
-
ONT
26h 37m
2 stops
$1,416Multiple Airlines
Mon, Jun 1 - Sat, Jul 25
Multiple Airlines Logo
11:59 pm - 9:15 pm
ONT
-
GMP
29h 16m
2 stops
Multiple Airlines Logo
12:05 pm - 7:52 pm
GMP
-
ONT
23h 47m
2 stops
$1,985Multiple Airlines
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.

Which airlines provide the cheapest flights from Ontario to Seoul?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Seoul were found on China Airlines ($812) and American Airlines ($1,017).

Find deals

Good to know

Cheapest flight$400
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 $400 for a one-way ticket and $812 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.

  • 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 airline 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.
8.3
China AirlinesOverall score based on 807 reviews
8.0Comfort
8.0Entertainment
7.8Food
8.3Boarding
8.5Crew
Airline reviews

Well, we upgraded and on a 14 hour flight not sure how we would tolerate it otherwise. The upgrades are ridiculously expensive and even with empty seats even in first class it was difficult to upgrade. Probably won’t fly China Air again due to this. The attendants tho were much better than the airlines in the states and there attentiveness and care for your comfort far exceeds other airlines in the states.

10.0 ExcellentEileen, Jan 2026
HAN - TPE
Read more China Airlines reviews

Well, we upgraded and on a 14 hour flight not sure how we would tolerate it otherwise. The upgrades are ridiculously expensive and even with empty seats even in first class it was difficult to upgrade. Probably won’t fly China Air again due to this. The attendants tho were much better than the airlines in the states and there attentiveness and care for your comfort far exceeds other airlines in the states.

Flight attendants. Food, entertainment and most of all, be on time.

Delayed. Not a full flight and whole rows left open with the paid seating. Food was ok. My beef meal only had one cube of beef the rest carrot cubes. Entertainment on personal device but didn’t know about it until the flight was almost done.

We are glad to have used China Airlines for our trip. Continue the good service! Thank you!

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.

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

Information on your arrival and departure airports

Ontario (ONT)