ONT - SEL

$397 Find Cheap Flights from Ontario to Seoul - Compare and Save

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 8/29. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$934
Typical prices: $907-$1,626
Multiple Airlines
Wed 8/5Thu 8/27
ONT - ICN • 1 stop
Cheapest one-way
$397
Multiple Airlines
Sat 8/29
ONT - ICN • 1 stop
Top airlines
China Airlines
Cheapest • from $1,089 (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 14m (one-way)
Insights
Insights
Insights
Insights
Start a new search
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

Wed, Aug 5 - Thu, Aug 27
Multiple Airlines Logo
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
8:30 pm - 11:02 am
ICN
-
ONT
54h 32m
2 stops
$934Multiple Airlines
Sat, Aug 1 - Tue, Aug 25
Multiple Airlines Logo
8:58 am - 8:10 pm
ONT
-
ICN
19h 12m
1 stop
Multiple Airlines Logo
7:20 am - 2:03 pm
ICN
-
ONT
46h 43m
2 stops
$935Multiple Airlines
Mon, Aug 24 - Mon, Sep 7
Multiple Airlines Logo
8:48 am - 9:40 pm
ONT
-
ICN
20h 52m
1 stop
Multiple Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$974Multiple Airlines
Tue, Sep 1 - Mon, Sep 7
Multiple Airlines Logo
3:13 pm - 9:40 pm
ONT
-
ICN
38h 27m
1 stop
Multiple Airlines Logo
7:15 pm - 2:03 pm
ICN
-
ONT
34h 48m
1 stop
$989Multiple Airlines
Mon, Oct 5 - Mon, Oct 19
Multiple Airlines Logo
11:38 am - 9:40 pm
ONT
-
ICN
18h 02m
1 stop
Multiple Airlines Logo
8:35 pm - 6:00 pm
ICN
-
ONT
37h 25m
1 stop
$993Multiple Airlines
Mon, Aug 31 - Mon, Sep 7
Multiple Airlines Logo
8:48 am - 9:40 pm
ONT
-
ICN
20h 52m
1 stop
Multiple Airlines Logo
7:15 pm - 2:03 pm
ICN
-
ONT
34h 48m
1 stop
$996Multiple Airlines
Mon, Oct 5 - Mon, Nov 16
Multiple Airlines Logo
11:38 am - 9:40 pm
ONT
-
ICN
18h 02m
1 stop
Multiple Airlines Logo
8:15 pm - 4:50 pm
ICN
-
ONT
37h 35m
1 stop
$1,001Multiple Airlines
Wed, Aug 5 - Thu, Aug 27
Multiple Airlines Logo
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
1:50 pm - 10:10 pm
ICN
-
ONT
24h 20m
2 stops
$1,013Multiple Airlines
Wed, Aug 12 - Wed, Aug 19
Multiple Airlines Logo
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
8:30 pm - 2:45 pm
ICN
-
ONT
58h 15m
2 stops
$1,015Multiple Airlines
Sat, Dec 5 - Sun, Dec 20
Japan Airlines Logo
6:00 am - 10:05 pm
ONT
-
GMP
23h 05m
2 stops
Japan Airlines Logo
8:00 am - 11:53 am
GMP
-
ONT
20h 53m
2 stops
$2,073Japan 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 cheapest month to fly from Ontario to Seoul?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Seoul, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Seoul is July, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $1,805 and $1,446 respectively.

Find deals

Good to know

Cheapest flight$397
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 5 days, the lowest price for a flight from Ontario to Seoul was $397 for a one-way ticket and $934 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 833 reviews
8.0Entertainment
8.3Boarding
7.8Food
8.0Comfort
8.5Crew
Airline reviews

We were not sat together for the longeset duration of our travel very uncomfortable didnt enjoy that they fed us at 2 am

2.0 MediocreAnonymous, Jul 2026
SFO - TPE
Read more China Airlines reviews

We were not sat together for the longeset duration of our travel very uncomfortable didnt enjoy that they fed us at 2 am

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

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

I did not take the flight, tried to cancel it right after I booked it, but was unable to reach anyone. I blame Kayak for this situation because they sent the booking through another company and I was unable to get anyone to talk to me about the situation. I had to just take the hit and pay for another flight through Cathay Pacific, which was wonderful. I will never use Kayak again. (I bet they don’t post this review!) I’ll just post about them on social media sites. I don’t want anyone to have to go through the hassle and expense I dealt with.

Unable to set seat assignment. Got a call from presumably “China airlines representative” but was asking for an exorbitant amount for the seat assignment. Was traveling as a family end up being assigned to different seats as a result. Will never use underpricer again.

Not many selections for entertainment. Bulk head seats are no longer available with out fee at the counter. That’s pretty lame.

I would have liked to know how to order a special meal (for medical purposes) before the flight.

Ask flight attendant for water during flight and she was a little rude get the water.

For a long-haul flight, the crew did a very good job of keeping the lavatories clean and the aisles clear.

The check-in crew at SF did not put on breakable glass stickers on check-in baggages which caused my antique whisky bottle to break during transportation.

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

Information on your arrival and departure airports

Ontario (ONT)