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Cheap flights from Ontario to Seoul from $478

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 12/10. 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.
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$879China Airlines
Find Deal
Mon, Mar 2 - Tue, Mar 17
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$880China Airlines
Find Deal
Sun, Mar 1 - Fri, Mar 20
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
8:15 pm - 5:50 pmICN-ONT
37h 35m1 stop
$891China Airlines
Find Deal
Sun, Mar 1 - Sun, Mar 8
China Airlines Logo
11:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$892China Airlines
Find Deal
Sun, Mar 15 - Sun, Mar 22
China Airlines Logo
11:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:35 pm - 6:00 pmICN-ONT
21h 25m1 stop
$896China Airlines
Find Deal
Thu, Mar 19 - Tue, Mar 31
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
$899China Airlines
Find Deal
Wed, Feb 11 - Wed, Mar 4
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
$903China Airlines
Find Deal
Wed, Jan 14 - Wed, Jan 28
China Airlines Logo
11:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:35 pm - 6:00 pmICN-ONT
21h 25m1 stop
$904China Airlines
Find Deal
Sat, Mar 21 - Sun, Mar 29
China Airlines Logo
12:10 am - 7:35 pmONT-ICN
27h 25m1 stop
China Airlines Logo
8:35 pm - 6:00 pmICN-ONT
37h 25m1 stop
$908China Airlines
Find Deal
Tue, Apr 21 - Thu, May 14
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:35 pm - 6:00 pmICN-ONT
21h 25m1 stop
$910China Airlines
Find Deal
Sun, Jan 11 - Sun, Apr 12

Alaska Airlines flights from Ontario to Incheon Intl Airport

Our best Alaska Airlines deals on Ontario to Incheon Intl Airport flight tickets
Alaska Airlines
Jan 13
ONT5:59 pmOntario
31h 36m
2 stops
ICN6:35 pmIncheon Intl
Jan 31
ICN8:35 pmIncheon Intl
16h 35m
2 stops
ONT8:10 pmOntario
$1,002
Find similar
Alaska Airlines
Nov 27
ONT6:00 amOntario
19h 35m
1 stop
ICN6:35 pmIncheon Intl
Dec 7
ICN8:35 pmIncheon Intl
31h 44m
1 stop
ONT11:19 amOntario
$1,231
Find similar
Alaska Airlines
Nov 25
ONT7:21 pmOntario
30h 14m
1 stop
ICN6:35 pmIncheon Intl
Dec 8
ICN8:35 pmIncheon Intl
19h 54m
1 stop
ONT11:29 pmOntario
$1,406
Find similar

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 2
ONT10:50 pmOntario
27h 25m
1 stop
ICN7:15 pmIncheon Intl
Mar 17
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT5:50 pmOntario
$879
Find similar
China Airlines
Mar 1
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Mar 20
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT5:50 pmOntario
$880
Find similar
China Airlines
Mar 1
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Mar 8
ICN8:15 pmIncheon Intl
37h 35m
1 stop
ONT5:50 pmOntario
$891
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 November 21, 2025.
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 3/2

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Tue 3/17

12:30 pm-5:50 pm

1 stop21h 20m

$879

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/1

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Fri 3/20

12:30 pm-5:50 pm

1 stop21h 20m

$880

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/1

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 3/8

8:15 pm-5:50 pm

1 stop37h 35m

$891

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/15

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Sun 3/22

12:30 pm-5:50 pm

1 stop21h 20m

$892

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 3/19

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Tue 3/31

12:35 pm-6:00 pm

1 stop21h 25m

$896

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 2/11

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 3/4

8:15 pm-4:50 pm

1 stop37h 35m

$899

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 1/14

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 1/28

8:15 pm-4:50 pm

1 stop37h 35m

$903

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 3/21

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 3/29

12:35 pm-6:00 pm

1 stop21h 25m

$904

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 4/21

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Thu 5/14

8:35 pm-6:00 pm

1 stop37h 25m

$908

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 1/11

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 4/12

12:35 pm-6:00 pm

1 stop21h 25m

$910

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 typical price of a round-trip flight between Ontario and Incheon Intl Airport?

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 Tuesday when prices can be found for as low as $787. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $932. 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 morning is the cheapest time of day to fly from Ontario to Incheon Intl Airport when you can find flight prices for as low as $811. Flying to Incheon Intl Airport in the morning 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 7% 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

Direct flights

None
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 19h 05m, 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 $896Free CancellationRating
8.3
782 reviews
Search China Airlines flights
Korean AirPriceFrom $1,111Free CancellationRating
8.4
1,170 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
Seongnam
Daejeon
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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