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Cheap flights from Ontario to Seoul from $428

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 3/30. 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
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$854China Airlines
Tue, Apr 7 - Wed, Apr 22
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$855China Airlines
Thu, Apr 30 - Sun, May 10
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$868China Airlines
Wed, Apr 15 - Wed, Apr 29
China Airlines Logo
12:10 am - 7:05 pm
ONT
-
ICN
26h 55m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$870China Airlines
Sun, Apr 12 - Wed, Apr 15
China Airlines Logo
12:45 am - 11:30 am
ONT
-
ICN
18h 45m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$889China Airlines
Mon, Aug 17 - Mon, Aug 31
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$890China Airlines
Sun, May 3 - Wed, May 6
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$891China Airlines
Fri, May 8 - Sat, May 16
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$895China Airlines
Tue, Apr 14 - Tue, Apr 21
China Airlines Logo
11:50 pm - 7:15 pm
ONT
-
ICN
27h 25m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$899China Airlines
Wed, Mar 11 - Wed, Apr 15
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$901China Airlines
Sat, May 2 - Sat, May 9

Alaska Airlines flights from Ontario to Incheon Intl Airport

Our best Alaska Airlines deals on Ontario to Incheon Intl Airport flight tickets
Alaska Airlines
Apr 29
ONT6:00 amOntario
19h 30m
1 stop
ICN5:30 pmIncheon Intl
May 10
ICN7:35 pmIncheon Intl
20h 24m
1 stop
ONT11:59 pmOntario
$964
Alaska Airlines
Apr 30
ONT6:00 amOntario
19h 30m
1 stop
ICN5:30 pmIncheon Intl
May 16
ICN7:35 pmIncheon Intl
31h 35m
1 stop
ONT11:10 amOntario
$971
Alaska Airlines
May 2
ONT3:26 pmOntario
34h 04m
1 stop
ICN5:30 pmIncheon Intl
May 16
ICN7:35 pmIncheon Intl
31h 35m
1 stop
ONT11:10 amOntario
$979

China Airlines flights from Ontario to Incheon Intl Airport

Our best China Airlines deals on Ontario to Incheon Intl Airport flight tickets
China Airlines
Apr 7
ONT12:10 amOntario
26h 55m
1 stop
ICN7:05 pmIncheon Intl
Apr 22
ICN8:05 pmIncheon Intl
37h 55m
1 stop
ONT6:00 pmOntario
$854
China Airlines
Apr 30
ONT12:10 amOntario
26h 55m
1 stop
ICN7:05 pmIncheon Intl
May 10
ICN8:05 pmIncheon Intl
37h 55m
1 stop
ONT6:00 pmOntario
$855
China Airlines
Apr 15
ONT12:10 amOntario
26h 55m
1 stop
ICN7:05 pmIncheon Intl
Apr 29
ICN12:45 pmIncheon Intl
21h 15m
1 stop
ONT6:00 pmOntario
$868

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 February 28, 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

Tue 4/7

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Wed 4/22

8:05 pm-6:00 pm

1 stop37h 55m

$854

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 4/30

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Sun 5/10

8:05 pm-6:00 pm

1 stop37h 55m

$855

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/15

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Wed 4/29

12:45 pm-6:00 pm

1 stop21h 15m

$868

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 4/12

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Wed 4/15

8:05 pm-6:00 pm

1 stop37h 55m

$870

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/17

12:45 am-11:30 am

1 stop18h 45m

Incheon Intl

Mon 8/31

12:45 pm-6:40 pm

1 stop21h 55m

$889

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 5/3

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Wed 5/6

12:45 pm-6:00 pm

1 stop21h 15m

$890

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 5/8

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Sat 5/16

12:45 pm-6:00 pm

1 stop21h 15m

$891

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 4/14

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 4/21

12:45 pm-6:00 pm

1 stop21h 15m

$895

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 3/11

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Wed 4/15

12:45 pm-6:00 pm

1 stop21h 15m

$899

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 5/2

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Sat 5/9

12:45 pm-6:00 pm

1 stop21h 15m

$901

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 $749. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $897. 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 $780. 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 $896 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 20% 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

16h 02m

Direct flights

None
The fastest flight from Ontario to Incheon Intl Airport takes 16h 02m
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 16h 02m, 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
809 reviews
Search China Airlines 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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