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Cheap flights from Ontario to Seoul from $375

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 8/22. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:07 pm - 9:40 pm
ONT
-
ICN
17h 33m
1 stop
Multiple Airlines Logo
7:15 pm - 7:36 pm
ICN
-
ONT
16h 21m
1 stop
$808Multiple Airlines
Mon, Sep 21 - Mon, Oct 5
Multiple Airlines Logo
12:07 pm - 9:40 pm
ONT
-
ICN
17h 33m
1 stop
Multiple Airlines Logo
7:15 pm - 2:00 pm
ICN
-
ONT
34h 45m
1 stop
$832Multiple Airlines
Mon, Sep 21 - Wed, Oct 7
Multiple Airlines Logo
8:48 am - 8:10 pm
ONT
-
ICN
19h 22m
1 stop
Multiple Airlines Logo
6:00 pm - 8:03 am
ICN
-
ONT
30h 03m
2 stops
$853Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
8:48 am - 8:10 pm
ONT
-
ICN
19h 22m
1 stop
Multiple Airlines Logo
6:00 pm - 10:29 am
ICN
-
ONT
32h 29m
1 stop
$857Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
2:30 pm - 5:30 am
ONT
-
ICN
47h 00m
2 stops
Multiple Airlines Logo
7:15 pm - 7:36 pm
ICN
-
ONT
16h 21m
1 stop
$866Multiple Airlines
Wed, Sep 23 - Mon, Oct 5
Multiple Airlines Logo
5:44 pm - 9:40 pm
ONT
-
ICN
35h 56m
2 stops
Multiple Airlines Logo
7:15 pm - 7:36 pm
ICN
-
ONT
16h 21m
1 stop
$874Multiple Airlines
Tue, Sep 22 - Mon, Oct 5
Multiple Airlines Logo
2:30 pm - 9:40 pm
ONT
-
ICN
39h 10m
2 stops
Multiple Airlines Logo
7:15 pm - 7:36 pm
ICN
-
ONT
16h 21m
1 stop
$875Multiple Airlines
Thu, Sep 17 - Mon, Oct 5
Multiple Airlines Logo
2:30 pm - 5:30 am
ONT
-
ICN
47h 00m
2 stops
Multiple Airlines Logo
7:15 pm - 2:00 pm
ICN
-
ONT
34h 45m
1 stop
$890Multiple Airlines
Wed, Sep 23 - Wed, Oct 7
Multiple Airlines Logo
12:07 pm - 9:40 pm
ONT
-
ICN
17h 33m
1 stop
Multiple Airlines Logo
7:15 pm - 9:09 am
ICN
-
ONT
29h 54m
2 stops
$891Multiple Airlines
Mon, Sep 21 - Mon, Oct 5
Multiple Airlines Logo
11:38 am - 9:20 pm
ONT
-
ICN
17h 42m
1 stop
Multiple Airlines Logo
7:45 pm - 4:10 pm
ICN
-
ONT
37h 25m
2 stops
$892Multiple Airlines
Fri, Oct 30 - Mon, Nov 2

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China Airlines flights from Ontario to Incheon Intl Airport

Our best China Airlines deals on Ontario to Incheon Intl Airport flight tickets
China Airlines
Aug 9
ONT12:45 amOntario
26h 20m
1 stop
ICN7:05 pmIncheon Intl
Aug 27
ICN12:45 pmIncheon Intl
21h 55m
1 stop
ONT6:40 pmOntario
$972
China Airlines
Oct 13
ONT12:10 amOntario
27h 25m
1 stop
ICN7:35 pmIncheon Intl
Oct 28
ICN12:30 pmIncheon Intl
21h 35m
1 stop
ONT6:05 pmOntario
$974
China Airlines
Oct 18
ONT12:10 amOntario
19h 05m
1 stop
ICN11:15 amIncheon Intl
Nov 2
ICN12:30 pmIncheon Intl
21h 35m
1 stop
ONT5:05 pmOntario
$975

Delta flights from Ontario to Incheon Intl Airport

Our best Delta deals on Ontario to Incheon Intl Airport flight tickets
Delta
Aug 3
ONT6:00 amOntario
17h 20m
1 stop
ICN3:20 pmIncheon Intl
Aug 11
ICN7:00 pmIncheon Intl
19h 45m
1 stop
ONT10:45 pmOntario
$1,257
Delta
Jul 31
ONT6:00 amOntario
17h 20m
1 stop
ICN3:20 pmIncheon Intl
Aug 3
ICN7:00 pmIncheon Intl
19h 45m
1 stop
ONT10:45 pmOntario
$1,307
Delta
Jul 27
ONT6:20 amOntario
18h 20m
1 stop
ICN4:40 pmIncheon Intl
Aug 4
ICN7:00 pmIncheon Intl
19h 45m
1 stop
ONT10:45 pmOntario
$1,382

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 July 26, 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

Cheapest round-trip
Quickest round-trip

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/21

12:07 pm-9:40 pm

1 stop17h 33m

Incheon Intl

Mon 10/5

7:15 pm-7:36 pm

1 stop16h 21m

$808

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/21

12:07 pm-9:40 pm

1 stop17h 33m

Incheon Intl

Wed 10/7

7:15 pm-2:00 pm

1 stop34h 45m

$832

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/22

8:48 am-8:10 pm

1 stop19h 22m

Incheon Intl

Sat 8/29

6:00 pm-8:03 am

2 stops30h 03m

$853

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/22

8:48 am-8:10 pm

1 stop19h 22m

Incheon Intl

Sat 8/29

6:00 pm-10:29 am

1 stop32h 29m

$857

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 9/23

2:30 pm-5:30 am

2 stops47h 00m

Incheon Intl

Mon 10/5

7:15 pm-7:36 pm

1 stop16h 21m

$866

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 9/22

5:44 pm-9:40 pm

2 stops35h 56m

Incheon Intl

Mon 10/5

7:15 pm-7:36 pm

1 stop16h 21m

$874

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 9/17

2:30 pm-9:40 pm

2 stops39h 10m

Incheon Intl

Mon 10/5

7:15 pm-7:36 pm

1 stop16h 21m

$875

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 9/23

2:30 pm-5:30 am

2 stops47h 00m

Incheon Intl

Wed 10/7

7:15 pm-2:00 pm

1 stop34h 45m

$890

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/21

12:07 pm-9:40 pm

1 stop17h 33m

Incheon Intl

Mon 10/5

7:15 pm-9:09 am

2 stops29h 54m

$891

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 10/30

11:38 am-9:20 pm

1 stop17h 42m

Incheon Intl

Mon 11/2

7:45 pm-4:10 pm

2 stops37h 25m

$892

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 month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Ontario is in July. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of July, then departing from Ontario during the month January is also very affordable. Most momondo users find prices during this month for around $0.

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 $754. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $915. 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 $788. 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 $978 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.

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

14h 57m

Direct flights

None
The fastest flight from Ontario to Incheon Intl Airport takes 14h 57m
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

Frequently asked questions about flying from Ontario to Incheon Intl Airport

  • 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 14h 57m, 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 $860Free CancellationRating
8.3
838 reviews
Search China Airlines flights

Traveling to a place near Seoul?

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