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Cheap flights from Ontario to Seoul from $413

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Seoul departing on 2/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:17 am - 5:10 am
ONT
-
ICN
25h 53m2 stops
Multiple Airlines Logo
6:55 pm - 10:22 am
ICN
-
ONT
31h 27m1 stop
$899Multiple Airlines
Mon, Mar 16 - Sun, Mar 22
Multiple Airlines Logo
9:06 am - 8:30 pm
ONT
-
ICN
19h 24m1 stop
Multiple Airlines Logo
6:55 pm - 10:22 am
ICN
-
ONT
31h 27m1 stop
$920Multiple Airlines
Mon, Mar 16 - Sun, Mar 22
China Airlines Logo
10:50 pm - 11:20 am
ONT
-
ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 5:50 pm
ICN
-
ONT
37h 35m1 stop
$954China Airlines
Sun, Mar 1 - Thu, Mar 19
China Airlines Logo
10:50 pm - 11:20 am
ONT
-
ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 5:50 pm
ICN
-
ONT
37h 35m1 stop
$959China Airlines
Mon, Mar 2 - Tue, Mar 17
American Airlines Logo
7:59 pm - 3:45 pm
ONT
-
ICN
27h 46m2 stops
American Airlines Logo
5:40 pm - 10:35 pm
ICN
-
ONT
20h 55m1 stop
$960American Airlines
Mon, Mar 30 - Mon, Apr 13
American Airlines Logo
11:58 pm - 4:45 pm
ONT
-
ICN
23h 47m1 stop
American Airlines Logo
5:55 pm - 10:30 pm
ICN
-
ONT
20h 35m1 stop
$962American Airlines
Wed, Feb 25 - Thu, Mar 12
China Airlines Logo
11:50 pm - 11:20 am
ONT
-
ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 5:50 pm
ICN
-
ONT
37h 35m1 stop
$967China Airlines
Fri, Mar 13 - Sun, Mar 15
American Airlines Logo
5:02 pm - 4:45 pm
ONT
-
ICN
30h 43m2 stops
American Airlines Logo
5:55 pm - 11:28 am
ICN
-
ONT
33h 33m2 stops
$971American Airlines
Mon, Mar 2 - Tue, Mar 17
China Airlines Logo
10:50 pm - 7:15 pm
ONT
-
ICN
27h 25m1 stop
China Airlines Logo
8:15 pm - 5:50 pm
ICN
-
ONT
37h 35m1 stop
$972China Airlines
Thu, Mar 5 - Sun, Mar 15
American Airlines Logo
3:09 pm - 4:45 pm
ONT
-
ICN
32h 36m1 stop
American Airlines Logo
7:15 pm - 10:48 pm
ICN
-
ONT
20h 33m1 stop
$974American Airlines
Tue, Jan 20 - Thu, Feb 5

China Airlines flights from Ontario to Incheon Intl Airport

Our best China Airlines deals on Ontario to Incheon Intl Airport flight tickets
China Airlines
Mar 1
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Mar 19
ICN8:15 pmIncheon Intl
37h 35m
1 stop
ONT5:50 pmOntario
$954
Find similar
China Airlines
Apr 6
ONT12:10 amOntario
26h 55m
1 stop
ICN7:05 pmIncheon Intl
Apr 22
ICN12:45 pmIncheon Intl
21h 15m
1 stop
ONT6:00 pmOntario
$959
Find similar
China Airlines
Mar 13
ONT11:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Mar 15
ICN8:15 pmIncheon Intl
37h 35m
1 stop
ONT5:50 pmOntario
$967
Find similar

Korean Air flights from Ontario to Incheon Intl Airport

Our best Korean Air deals on Ontario to Incheon Intl Airport flight tickets
Korean Air
Jan 9
ONT7:30 amOntario
16h 00m
1 stop
ICN4:30 pmIncheon Intl
Jan 23
ICN8:05 pmIncheon Intl
19h 46m
1 stop
ONT10:51 pmOntario
$1,305
Find similar
Korean Air
Jan 9
ONT7:30 amOntario
16h 00m
1 stop
ICN4:30 pmIncheon Intl
Jan 23
ICN8:05 pmIncheon Intl
19h 46m
1 stop
ONT10:51 pmOntario
$1,349
Find similar
Korean Air
Jan 9
ONT7:30 amOntario
16h 00m
1 stop
ICN4:30 pmIncheon Intl
Jan 23
ICN4:10 pmIncheon Intl
14h 46m
1 stop
ONT1:56 pmOntario
$1,495
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Incheon Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 6, 2026.
Use the filters below to find and compare flights from Ontario to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 3/16

11:17 am-5:10 am

2 stops25h 53m

Incheon Intl

Sun 3/22

6:55 pm-10:22 am

1 stop31h 27m

$899

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 3/16

9:06 am-8:30 pm

1 stop19h 24m

Incheon Intl

Sun 3/22

6:55 pm-10:22 am

1 stop31h 27m

$920

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/1

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 3/19

8:15 pm-5:50 pm

1 stop37h 35m

$954

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 3/2

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Tue 3/17

8:15 pm-5:50 pm

1 stop37h 35m

$959

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 3/30

7:59 pm-3:45 pm

2 stops27h 46m

Incheon Intl

Mon 4/13

5:40 pm-10:35 pm

1 stop20h 55m

$960

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 2/25

11:58 pm-4:45 pm

1 stop23h 47m

Incheon Intl

Thu 3/12

5:55 pm-10:30 pm

1 stop20h 35m

$962

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 3/13

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 3/15

8:15 pm-5:50 pm

1 stop37h 35m

$967

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 3/2

5:02 pm-4:45 pm

2 stops30h 43m

Incheon Intl

Tue 3/17

5:55 pm-11:28 am

2 stops33h 33m

$971

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 3/5

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Sun 3/15

8:15 pm-5:50 pm

1 stop37h 35m

$972

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 1/20

3:09 pm-4:45 pm

1 stop32h 36m

Incheon Intl

Thu 2/5

7:15 pm-10:48 pm

1 stop20h 33m

$974

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

How to get the cheapest flight ticket from Ontario to Incheon Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from Ontario to Incheon Intl Airport is on a Sunday when prices can be found for as low as $769. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $917. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

In the evening is the cheapest time of day to fly from Ontario to Incheon Intl Airport when you can find flight prices for as low as $806. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $876 on average. Flights to Incheon Intl Airport from Ontario at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Ontario to Incheon Intl Airport flights?

You could potentially save up to 19% on your flight if you consider stops on a Ontario to Incheon Intl Airport flight.

When to book flights from Ontario to Incheon Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Incheon Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Incheon Intl Airport (ONT to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Incheon Intl Airport

Fastest flight time

17h 40m

Direct flights

None
The fastest flight from Ontario to Incheon Intl Airport takes 17h 40m
There are no direct flights from Ontario to Incheon Intl Airport. There are no popular flight routes from Ontario to Incheon Intl Airport.
Search flight deals

  • How far is Ontario to Incheon Intl by plane?

    The distance between Ontario and Incheon Intl is about 6003.0 mi. Flights usually cover this in 17h 40m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Ontario Airport to Incheon Intl Airport?

    Prices for flights from Ontario Airport to Incheon Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Incheon Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Incheon Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Incheon Intl Airport.

  • What documentation or ID do you need to fly to Incheon Intl Airport?

    The necessary travel and health documents for your Incheon Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Incheon Intl Airport?

Best airlines flying from Ontario to Incheon Intl Airport

Compare and see reviews for airlines that fly from Ontario to Incheon Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
China AirlinesPriceFrom $892Free CancellationRating
8.3
798 reviews
Search China Airlines flights
Korean AirPriceFrom $1,111Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Suwon
Daejeon
Seongnam
Anyang

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Seoul?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seoul from Ontario.

Can I find flights from Ontario to Seoul with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seoul from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Seoul?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Seoul.

I’m not ready to book a flight from Ontario to Seoul right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Seoul flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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