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Cheap flights from Ontario to Seoul from $392

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 3/9. 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 - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
12:45 pm - 6:00 pm
ICN
-
ONT
21h 15m
1 stop
$812China Airlines
Fri, May 8 - Tue, May 19
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
$814China Airlines
Tue, May 5 - Mon, May 18
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
$815China Airlines
Sun, Apr 26 - Tue, May 19
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
$829China Airlines
Tue, Apr 14 - Wed, Apr 29
China Airlines Logo
12:10 am - 11:30 am
ONT
-
ICN
19h 20m
1 stop
China Airlines Logo
8:05 pm - 6:00 pm
ICN
-
ONT
37h 55m
1 stop
$833China Airlines
Mon, May 11 - Tue, May 26
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
$835China Airlines
Tue, May 12 - Sun, May 17
China Airlines Logo
10:50 pm - 7:15 pm
ONT
-
ICN
27h 25m
1 stop
China Airlines Logo
12:30 pm - 5:50 pm
ICN
-
ONT
21h 20m
1 stop
$841China Airlines
Thu, Mar 5 - Fri, Mar 13
China Airlines Logo
11:50 pm - 11:20 am
ONT
-
ICN
19h 30m
1 stop
China Airlines Logo
12:30 pm - 5:50 pm
ICN
-
ONT
21h 20m
1 stop
$855China Airlines
Sun, Mar 15 - Thu, Mar 26
Multiple Airlines Logo
11:59 pm - 9:15 pm
ONT
-
GMP
29h 16m
2 stops
Multiple Airlines Logo
8:00 am - 6:37 pm
GMP
-
ONT
26h 37m
2 stops
$1,416Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Japan Airlines Logo
6:14 am - 10:55 am
ONT
-
GMP
36h 41m
2 stops
Japan Airlines Logo
8:00 am - 6:13 pm
GMP
-
ONT
26h 13m
2 stops
$1,590Japan Airlines
Mon, Mar 16 - Mon, Mar 23

China Airlines flights from Ontario to Seoul

Our best China Airlines deals on Ontario to Seoul flight tickets
China Airlines
May 8
ONT12:10 amOntario
19h 20m
1 stop
ICN11:30 amIncheon Intl
May 19
ICN12:45 pmIncheon Intl
21h 15m
1 stop
ONT6:00 pmOntario
$812
China Airlines
May 5
ONT12:10 amOntario
19h 20m
1 stop
ICN11:30 amIncheon Intl
May 18
ICN12:45 pmIncheon Intl
21h 15m
1 stop
ONT6:00 pmOntario
$814
China Airlines
Apr 26
ONT12:10 amOntario
19h 20m
1 stop
ICN11:30 amIncheon Intl
May 19
ICN12:45 pmIncheon Intl
21h 15m
1 stop
ONT6:00 pmOntario
$815

Japan Airlines flights from Ontario to Seoul

Our best Japan Airlines deals on Ontario to Seoul flight tickets
Japan Airlines
Feb 21
ONT2:39 pmOntario
33h 06m
1 stop
ICN4:45 pmIncheon Intl
Apr 8
ICN5:50 pmIncheon Intl
21h 56m
1 stop
ONT11:46 pmOntario
$1,263
Japan Airlines
Mar 16
ONT6:14 amOntario
36h 41m
2 stops
GMP10:55 amSeoul Gimpo Intl
Mar 23
GMP8:00 amSeoul Gimpo Intl
26h 13m
2 stops
ONT6:13 pmOntario
$1,590
Japan Airlines
Mar 11
ONT7:00 amOntario
23h 05m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Mar 31
GMP12:05 pmSeoul Gimpo Intl
22h 37m
2 stops
ONT6:42 pmOntario
$7,612

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 February 20, 2026.
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

Fri 5/8

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 5/19

12:45 pm-6:00 pm

1 stop21h 15m

$812

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 5/5

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Mon 5/18

12:45 pm-6:00 pm

1 stop21h 15m

$814

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 4/26

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 5/19

12:45 pm-6:00 pm

1 stop21h 15m

$815

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 4/14

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Wed 4/29

12:45 pm-6:00 pm

1 stop21h 15m

$829

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 5/11

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 5/26

8:05 pm-6:00 pm

1 stop37h 55m

$833

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 5/12

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Sun 5/17

12:45 pm-6:00 pm

1 stop21h 15m

$835

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 3/5

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Fri 3/13

12:30 pm-5:50 pm

1 stop21h 20m

$841

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/15

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 3/26

12:30 pm-5:50 pm

1 stop21h 20m

$855

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Mon 4/13

11:59 pm-9:15 pm

2 stops29h 16m

Seoul Gimpo Intl

Mon 4/20

8:00 am-6:37 pm

2 stops26h 37m

$1,416

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Mon 3/16

6:14 am-10:55 am

2 stops36h 41m

Seoul Gimpo Intl

Mon 3/23

8:00 am-6:13 pm

2 stops26h 13m

$1,590

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, Sunday is the cheapest day to fly to Seoul from Ontario. The lowest ticket price found for a Sunday departure recently was $753. 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 $900.

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

Flying to Seoul from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $785 when looking at flights departing in the evening. At noon is when there is more demand to fly to Seoul, so prices are often more expensive at around $896 per ticket.

Can stopping save me money on Ontario to Seoul flights?

You could potentially save up to 4% 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

Fastest flight time

15h 32m

Direct flights

None
The fastest flight from Ontario to Seoul takes 15h 32m
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 15h 32m.

  • 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 $860Free CancellationRating
8.3
804 reviews
Search China Airlines 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