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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
12:10 am - 11:15 amONT-ICN
19h 05m1 stop
China Airlines Logo
12:35 pm - 6:00 pmICN-ONT
21h 25m1 stop
$879China Airlines
Find Deal
Mon, Apr 6 - Tue, Apr 28
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
11:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$882China Airlines
Find Deal
Wed, Mar 11 - Mon, Mar 23
China Airlines Logo
11:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$891China Airlines
Find Deal
Fri, Mar 13 - Sun, Mar 22
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 - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 5:50 pmICN-ONT
21h 20m1 stop
$894China Airlines
Find Deal
Sun, Mar 8 - Fri, Mar 27
Multiple Airlines Logo
11:59 pm - 10:05 pmONT-GMP
29h 06m2 stops
Multiple Airlines Logo
8:00 am - 6:45 pmGMP-ONT
27h 45m2 stops
$1,436Multiple Airlines
Find Deal
Mon, Jan 12 - Mon, Jan 26
Japan Airlines Logo
6:00 am - 10:05 pmONT-GMP
23h 05m2 stops
Japan Airlines Logo
8:00 am - 3:08 pmGMP-ONT
24h 08m2 stops
$1,762Japan Airlines
Find Deal
Fri, Jan 2 - Sat, Jan 17
Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:20 pm - 3:50 pmGMP-ONT
36h 30m2 stops
$2,107Japan Airlines
Find Deal
Sat, May 16 - Fri, May 29
Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:20 pm - 6:19 pmGMP-ONT
38h 59m2 stops
$2,278Japan Airlines
Find Deal
Sat, Mar 28 - Sun, Apr 5

China Airlines flights from Ontario to Seoul

Our best China Airlines deals on Ontario to Seoul 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 11
ONT11:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Mar 23
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT5:50 pmOntario
$882
Find similar

Alaska Airlines flights from Ontario to Seoul

Our best Alaska Airlines deals on Ontario to Seoul flight tickets
Alaska Airlines
Nov 20
ONT4:11 pmOntario
33h 24m
1 stop
ICN6:35 pmIncheon Intl
Nov 22
ICN8:35 pmIncheon Intl
30h 20m
1 stop
ONT9:55 amOntario
$1,313
Find similar
Alaska Airlines
Nov 20
ONT6:00 amOntario
19h 35m
1 stop
ICN6:35 pmIncheon Intl
Dec 5
ICN8:35 pmIncheon Intl
19h 54m
1 stop
ONT11:29 pmOntario
$1,391
Find similar
Alaska Airlines
Nov 25
ONT4:48 pmOntario
32h 47m
1 stop
ICN6:35 pmIncheon Intl
Feb 27
ICN8:35 pmIncheon Intl
20h 17m
2 stops
ONT11:52 pmOntario
$1,415
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Seoul 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 19, 2025.
Use the filters below to find and compare flights from Ontario to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 4/6

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Tue 4/28

12:35 pm-6:00 pm

1 stop21h 25m

$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

Wed 3/11

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Mon 3/23

12:30 pm-5:50 pm

1 stop21h 20m

$882

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 3/13

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 3/22

12:30 pm-5:50 pm

1 stop21h 20m

$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

Sun 3/8

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Fri 3/27

12:30 pm-5:50 pm

1 stop21h 20m

$894

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Mon 1/12

11:59 pm-10:05 pm

2 stops29h 06m

Seoul Gimpo Intl

Mon 1/26

8:00 am-6:45 pm

2 stops27h 45m

$1,436

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Fri 1/2

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Sat 1/17

8:00 am-3:08 pm

2 stops24h 08m

$1,762

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sat 5/16

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Fri 5/29

7:20 pm-3:50 pm

2 stops36h 30m

$2,107

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sat 3/28

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Sun 4/5

7:20 pm-6:19 pm

2 stops38h 59m

$2,278

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 Seoul

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 Seoul?

According to our data, Tuesday is the cheapest day to fly to Seoul from Ontario. The lowest ticket price found for a Tuesday departure recently was $787. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Seoul is Friday, with ticket prices averaging around $932.

What is the cheapest time of day to depart on your flight to Seoul?

Flying to Seoul from Ontario in the morning is the least expensive time of day to depart. momondo users have found prices as low as $810 when looking at flights departing in the morning. At noon is when there is more demand to fly to Seoul, so prices are often more expensive at around $876 per ticket.

Can stopping save me money on Ontario to Seoul flights?

You could potentially save up to 7% on your flight if you consider stops on a Ontario to Seoul flight.

When to book flights from Ontario to Seoul

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

Cheap Ontario to Seoul (ONT to SEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Seoul

Direct flights

None
There are no direct flights from Ontario to Seoul. There are no popular flight routes from Ontario to Seoul.
Search flight deals

  • How far is Ontario to Seoul by plane?

    Seoul is 5976.3 mi away from Ontario. By plane, this route typically takes 19h 05m.

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

    Prices for flights from Ontario Airport to Seoul are updated daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Seoul.

  • What documentation or ID do you need to fly to Seoul?

    The necessary travel and health documents for your Seoul 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 Seoul?

Best airlines flying from Ontario to Seoul

Compare and see reviews for airlines that fly from Ontario to Seoul 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
1,167 reviews
Search Korean Air flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Seoul for you.

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?

Once you have performed a search for Ontario to Seoul flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Ontario to Seoul flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to South Korea

Fly into one of these airports located in Seoul

Airports listed have a maximum distance of 30.3 mi from Seoul
Seoul Gimpo Intl Airport
Incheon Intl Airport