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Cheap flights from Ontario to Seoul from $473

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 10/13. 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
10:47 pm - 3:45 pmONT-ICN
48h 58m2 stops
Multiple Airlines Logo
6:55 pm - 11:50 pmICN-ONT
20h 55m1 stop
$820Multiple Airlines
Find Deal
Sun, Oct 19 - Fri, Oct 31
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
$938China Airlines
Find Deal
Sun, Mar 1 - Wed, Mar 18
Multiple Airlines Logo
8:02 am - 5:20 amONT-ICN
28h 18m1 stop
Multiple Airlines Logo
9:20 pm - 7:17 amICN-ONT
26h 57m2 stops
$944Multiple Airlines
Find Deal
Sun, Nov 2 - Thu, Nov 13
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$947China Airlines
Find Deal
Sun, Nov 16 - Wed, Nov 19
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
8:15 pm - 4:50 pmICN-ONT
37h 35m1 stop
$948China Airlines
Find Deal
Sun, Nov 2 - Thu, Nov 13
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
8:15 pm - 4:50 pmICN-ONT
37h 35m1 stop
$951China Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 13
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$956China Airlines
Find Deal
Mon, Feb 9 - Mon, Mar 2
Alaska Airlines Logo
6:00 am - 6:35 pmONT-ICN
19h 35m1 stop
Alaska Airlines Logo
8:35 pm - 6:17 pmICN-ONT
14h 42m1 stop
$1,051Alaska Airlines
Find Deal
Sun, Feb 8 - Fri, Mar 6
Alaska Airlines Logo
4:03 pm - 6:35 pmONT-ICN
33h 32m1 stop
Alaska Airlines Logo
8:35 pm - 6:17 pmICN-ONT
14h 42m1 stop
$1,059Alaska Airlines
Find Deal
Sat, Feb 7 - Sun, Feb 22
Alaska Airlines Logo
4:03 pm - 6:35 pmONT-ICN
33h 32m1 stop
Alaska Airlines Logo
8:35 pm - 7:47 pmICN-ONT
16h 12m2 stops
$1,094Alaska Airlines
Find Deal
Wed, Feb 11 - Sat, Feb 28

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
27h 25m
1 stop
ICN7:15 pmIncheon Intl
Mar 18
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT5:50 pmOntario
$938
Find similar
China Airlines
Nov 16
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Nov 19
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT4:50 pmOntario
$947
Find similar
China Airlines
Nov 2
ONT10:50 pmOntario
27h 25m
1 stop
ICN7:15 pmIncheon Intl
Nov 13
ICN8:15 pmIncheon Intl
37h 35m
1 stop
ONT4:50 pmOntario
$948
Find similar

Alaska Airlines flights from Ontario to Incheon Intl Airport

Our best Alaska Airlines deals on Ontario to Incheon Intl Airport flight tickets
Alaska Airlines
Feb 8
ONT6:00 amOntario
19h 35m
1 stop
ICN6:35 pmIncheon Intl
Mar 6
ICN8:35 pmIncheon Intl
14h 42m
1 stop
ONT6:17 pmOntario
$1,051
Find similar
Alaska Airlines
Feb 7
ONT4:03 pmOntario
33h 32m
1 stop
ICN6:35 pmIncheon Intl
Feb 22
ICN8:35 pmIncheon Intl
14h 42m
1 stop
ONT6:17 pmOntario
$1,059
Find similar
Alaska Airlines
Feb 11
ONT4:03 pmOntario
33h 32m
1 stop
ICN6:35 pmIncheon Intl
Feb 28
ICN8:35 pmIncheon Intl
16h 12m
2 stops
ONT7:47 pmOntario
$1,094
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 October 6, 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

Sun 10/19

10:47 pm-3:45 pm

2 stops48h 58m

Incheon Intl

Fri 10/31

6:55 pm-11:50 pm

1 stop20h 55m

$820

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/1

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Wed 3/18

12:30 pm-5:50 pm

1 stop21h 20m

$938

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/2

8:02 am-5:20 am

1 stop28h 18m

Incheon Intl

Thu 11/13

9:20 pm-7:17 am

2 stops26h 57m

$944

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/16

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 11/19

12:30 pm-4:50 pm

1 stop21h 20m

$947

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/2

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Thu 11/13

8:15 pm-4:50 pm

1 stop37h 35m

$948

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 11/10

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Thu 11/13

8:15 pm-4:50 pm

1 stop37h 35m

$951

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 2/9

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Mon 3/2

12:30 pm-4:50 pm

1 stop21h 20m

$956

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 2/8

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Fri 3/6

8:35 pm-6:17 pm

1 stop14h 42m

$1,051

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 2/7

4:03 pm-6:35 pm

1 stop33h 32m

Incheon Intl

Sun 2/22

8:35 pm-6:17 pm

1 stop14h 42m

$1,059

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 2/11

4:03 pm-6:35 pm

1 stop33h 32m

Incheon Intl

Sat 2/28

8:35 pm-7:47 pm

2 stops16h 12m

$1,094

Flights are sorted by cheapest round-trip flights 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 Tuesday when prices can be found for as low as $792. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $949. 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 $814. 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 10% 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.
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  • 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 16h 55m, 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 $961Free CancellationRating
8.3
767 reviews
Search China Airlines flights
Korean AirPriceFrom $1,111Free CancellationRating
8.4
1,145 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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