ONT - SEL

$515 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 4/25. 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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Everything you should know

Cheapest round-trip
$895
Typical prices: $1,302-$860
China Airlines
Mon 8/31Wed 9/9
ONT - ICN • 1 stop
Cheapest one-way
$515
China Airlines
Sat 4/25
ONT - ICN • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Seoul. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Hong Kong (HKG)
Cheapest • Avg $733 (round-trip)
San Francisco (SFO)
Shortest trip • 17h 13m (one-way)
Insights
Insights
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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

Mon, Aug 31 - Wed, Sep 9
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$895China Airlines
Thu, Sep 3 - Fri, Sep 11
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$898China Airlines
Mon, Aug 31 - Fri, Sep 11
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$907China Airlines
Mon, Aug 31 - Thu, Sep 10
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$908China Airlines
Sun, Apr 26 - Wed, May 13
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
$909China Airlines
Mon, Aug 31 - Wed, Sep 16
China Airlines Logo
12:45 am - 11:30 am
ONT
-
ICN
18h 45m
1 stop
China Airlines Logo
8:35 pm - 6:00 pm
ICN
-
ONT
37h 25m
1 stop
$914China Airlines
Tue, Aug 18 - Fri, Sep 4
China Airlines Logo
12:45 am - 11:30 am
ONT
-
ICN
18h 45m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$917China Airlines
Tue, Apr 28 - Wed, May 6
Multiple Airlines Logo
12:10 am - 6:00 pm
ONT
-
GMP
25h 50m
2 stops
Multiple Airlines Logo
8:10 am - 6:00 pm
GMP
-
ONT
25h 50m
2 stops
$1,440Multiple Airlines
Thu, May 21 - Tue, Jun 2
Japan Airlines Logo
6:00 am - 10:40 am
ONT
-
GMP
36h 40m
2 stops
Japan Airlines Logo
8:00 am - 3:09 pm
GMP
-
ONT
23h 09m
2 stops
$2,151Japan Airlines
Thu, Jun 18 - Mon, Jun 22
Japan Airlines Logo
6:02 am - 10:40 am
ONT
-
GMP
36h 38m
2 stops
Japan Airlines Logo
8:00 am - 4:30 pm
GMP
-
ONT
24h 30m
2 stops
$2,207Japan 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.

What is the most popular layover airport when flying from Ontario to Seoul?

Percentage of 1-stop round-trip flights from Ontario to Seoul chosen by KAYAK users via each layover airport in the last 12 months (only includes trips with the same layover airport on both legs).

Taipei City (TPE) is the top choice – 72% of KAYAK users who clicked on 1-stop flights from Ontario to Seoul picked an itinerary connecting there.

What is the cheapest layover airport when flying from Ontario to Seoul?

Average round-trip price for 1-stop flights from Ontario to Seoul clicked by KAYAK users in the last 12 months (only includes trips with the same layover airport on both legs).

Flights via Hong Kong (HKG) offer the most affordable fares, with an average round-trip price of $733.

Which layover airport offers the shortest total travel time from Ontario to Seoul?

Shortest average total travel time for 1-stop one-way flights from Ontario to Seoul via different layover airports, based on KAYAK user data from the last 12 months.

Consider flying via San Francisco (SFO) for the shortest journey. The average one-way travel time for flights connecting there is 17h 13m.

Which layover airport has the quickest connection when flying from Ontario to Seoul?

Average layover duration at different layover airports for 1-stop one-way flights from Ontario to Seoul, based on KAYAK user data from the last 12 months.

If you prefer a quick connection, Hong Kong (HKG) often has the shortest layovers from Ontario to Seoul, with an average of 1h 30m.

Find deals

Good to know

Cheapest flight$515
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 $515 for a one-way ticket and $895 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 816 reviews
8.0Comfort
7.8Food
8.5Crew
8.0Entertainment
8.3Boarding
Airline reviews

We really enjoyed our flight to Seattle. The food was great and service was attentive.

10.0 ExcellentA, Apr 2026
TPE - SEA
Read more China Airlines reviews

We really enjoyed our flight to Seattle. The food was great and service was attentive.

Everything was fine except the seats were quite compressed and hard for the 12 hour flight

The crew are amazing. Very professional, polite, kind, and accommodating.

The crew was very professional and friendly. Although there was a water leak from panel above, the crew was trying to mitigate the consequence. We are happy with its service and the value offered. We will definitely take China Airlines again.

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.

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

Information on your arrival and departure airports

Ontario (ONT)