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Cheap flights from Ontario to Seoul from $515

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 4/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$895China Airlines
Mon, Aug 31 - Wed, Sep 9
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$898China Airlines
Thu, Sep 3 - Fri, Sep 11
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$907China Airlines
Mon, Aug 31 - Fri, Sep 11
China Airlines Logo
12:45 am - 7:05 pm
ONT
-
ICN
26h 20m
1 stop
China Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$908China Airlines
Mon, Aug 31 - Thu, Sep 10
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
$909China Airlines
Sun, Apr 26 - Wed, May 13
China Airlines Logo
12:45 am - 11:30 am
ONT
-
ICN
18h 45m
1 stop
China Airlines Logo
8:35 pm - 6:00 pm
ICN
-
ONT
37h 25m
1 stop
$914China Airlines
Mon, Aug 31 - Wed, Sep 16
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
$917China Airlines
Tue, Aug 18 - Fri, Sep 4
Multiple Airlines Logo
12:10 am - 6:00 pm
ONT
-
GMP
25h 50m
2 stops
Multiple Airlines Logo
8:10 am - 6:00 pm
GMP
-
ONT
25h 50m
2 stops
$1,440Multiple Airlines
Tue, Apr 28 - Wed, May 6
Japan Airlines Logo
6:00 am - 10:40 am
ONT
-
GMP
36h 40m
2 stops
Japan Airlines Logo
8:00 am - 3:09 pm
GMP
-
ONT
23h 09m
2 stops
$2,151Japan Airlines
Thu, May 21 - Tue, Jun 2
Japan Airlines Logo
6:02 am - 10:40 am
ONT
-
GMP
36h 38m
2 stops
Japan Airlines Logo
8:00 am - 4:30 pm
GMP
-
ONT
24h 30m
2 stops
$2,207Japan Airlines
Thu, Jun 18 - Mon, Jun 22

China Airlines flights from Ontario to Seoul

Our best China Airlines deals on Ontario to Seoul flight tickets
China Airlines
Aug 31
ONT12:45 amOntario
26h 20m
1 stop
ICN7:05 pmIncheon Intl
Sep 9
ICN12:45 pmIncheon Intl
21h 55m
1 stop
ONT6:40 pmOntario
$895
China Airlines
Sep 3
ONT12:45 amOntario
26h 20m
1 stop
ICN7:05 pmIncheon Intl
Sep 11
ICN12:45 pmIncheon Intl
21h 55m
1 stop
ONT6:40 pmOntario
$898
China Airlines
Aug 31
ONT12:45 amOntario
26h 20m
1 stop
ICN7:05 pmIncheon Intl
Sep 11
ICN8:05 pmIncheon Intl
38h 35m
1 stop
ONT6:40 pmOntario
$907

Japan Airlines flights from Ontario to Seoul

Our best Japan Airlines deals on Ontario to Seoul flight tickets
Japan Airlines
May 21
ONT6:00 amOntario
36h 40m
2 stops
GMP10:40 amSeoul Gimpo Intl
Jun 2
GMP8:00 amSeoul Gimpo Intl
23h 09m
2 stops
ONT3:09 pmOntario
$2,151
Japan Airlines
Jun 18
ONT6:02 amOntario
36h 38m
2 stops
GMP10:40 amSeoul Gimpo Intl
Jun 22
GMP8:00 amSeoul Gimpo Intl
24h 30m
2 stops
ONT4:30 pmOntario
$2,207
Japan Airlines
May 21
ONT6:00 amOntario
36h 40m
2 stops
GMP10:40 amSeoul Gimpo Intl
Jun 2
GMP8:00 amSeoul Gimpo Intl
23h 09m
2 stops
ONT3:09 pmOntario
$2,739

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 April 9, 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

Cheapest round-trip

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/31

12:45 am-7:05 pm

1 stop26h 20m

Incheon Intl

Wed 9/9

12:45 pm-6:40 pm

1 stop21h 55m

$895

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 9/3

12:45 am-7:05 pm

1 stop26h 20m

Incheon Intl

Fri 9/11

12:45 pm-6:40 pm

1 stop21h 55m

$898

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/31

12:45 am-7:05 pm

1 stop26h 20m

Incheon Intl

Fri 9/11

8:05 pm-6:40 pm

1 stop38h 35m

$907

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/31

12:45 am-7:05 pm

1 stop26h 20m

Incheon Intl

Thu 9/10

8:05 pm-6:40 pm

1 stop38h 35m

$908

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 4/26

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Wed 5/13

8:05 pm-6:00 pm

1 stop37h 55m

$909

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/31

12:45 am-11:30 am

1 stop18h 45m

Incheon Intl

Wed 9/16

8:35 pm-6:00 pm

1 stop37h 25m

$914
Quickest round-trip

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 8/18

12:45 am-11:30 am

1 stop18h 45m

Incheon Intl

Fri 9/4

12:45 pm-6:40 pm

1 stop21h 55m

$917

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Tue 4/28

12:10 am-6:00 pm

2 stops25h 50m

Seoul Gimpo Intl

Wed 5/6

8:10 am-6:00 pm

2 stops25h 50m

$1,440

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Thu 5/21

6:00 am-10:40 am

2 stops36h 40m

Seoul Gimpo Intl

Tue 6/2

8:00 am-3:09 pm

2 stops23h 09m

$2,151

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Thu 6/18

6:02 am-10:40 am

2 stops36h 38m

Seoul Gimpo Intl

Mon 6/22

8:00 am-4:30 pm

2 stops24h 30m

$2,207

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 $739. 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 $897.

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 $769 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 $969 per ticket.

Can stopping save me money on Ontario to Seoul flights?

You could potentially save up to 25% 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 00m

Direct flights

None
The fastest flight from Ontario to Seoul takes 15h 00m
There are no direct flights from Ontario to Seoul. There are no popular flight routes from Ontario to Seoul.
Search flight deals

Frequently asked questions about flying from Ontario to Seoul

  • How far is Ontario to Seoul by plane?

    Seoul is 5976.3 mi away from Ontario. By plane, this route typically takes 15h 00m.

  • 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.

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
816 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