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Cheap flights from Ontario to Seoul from $373

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 8/8. 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
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
8:30 pm - 11:02 am
ICN
-
ONT
54h 32m
2 stops
$897Multiple Airlines
Wed, Aug 5 - Thu, Aug 27
Multiple Airlines Logo
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
8:30 pm - 11:02 am
ICN
-
ONT
54h 32m
2 stops
$934Multiple Airlines
Wed, Aug 5 - Thu, Aug 27
Multiple Airlines Logo
8:58 am - 8:10 pm
ONT
-
ICN
19h 12m
1 stop
Multiple Airlines Logo
7:20 am - 2:03 pm
ICN
-
ONT
46h 43m
2 stops
$935Multiple Airlines
Sat, Aug 1 - Tue, Aug 25
Multiple Airlines Logo
8:48 am - 9:40 pm
ONT
-
ICN
20h 52m
1 stop
Multiple Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$974Multiple Airlines
Mon, Aug 24 - Mon, Sep 7
Multiple Airlines Logo
8:58 am - 9:40 pm
ONT
-
ICN
20h 42m
1 stop
Multiple Airlines Logo
7:15 pm - 11:02 am
ICN
-
ONT
31h 47m
1 stop
$978Multiple Airlines
Sun, Aug 16 - Sun, Aug 23
Multiple Airlines Logo
8:48 am - 9:40 pm
ONT
-
ICN
20h 52m
1 stop
Multiple Airlines Logo
8:05 pm - 6:40 pm
ICN
-
ONT
38h 35m
1 stop
$985Multiple Airlines
Mon, Sep 7 - Sun, Sep 13
Multiple Airlines Logo
8:48 am - 9:40 pm
ONT
-
ICN
20h 52m
1 stop
Multiple Airlines Logo
7:15 pm - 4:10 pm
ICN
-
ONT
36h 55m
2 stops
$989Multiple Airlines
Mon, Sep 7 - Mon, Sep 14
Multiple Airlines Logo
11:38 am - 9:40 pm
ONT
-
ICN
18h 02m
1 stop
Multiple Airlines Logo
8:35 pm - 6:00 pm
ICN
-
ONT
37h 25m
1 stop
$993Multiple Airlines
Mon, Oct 5 - Mon, Oct 19
Multiple Airlines Logo
8:58 am - 8:10 pm
ONT
-
ICN
19h 12m
1 stop
Multiple Airlines Logo
12:45 pm - 6:40 pm
ICN
-
ONT
21h 55m
1 stop
$1,000Multiple Airlines
Sat, Aug 1 - Sun, Aug 30
Japan Airlines Logo
6:00 am - 10:05 pm
ONT
-
GMP
23h 05m
2 stops
Japan Airlines Logo
8:00 am - 11:53 am
GMP
-
ONT
20h 53m
2 stops
$2,073Japan Airlines
Sat, Dec 5 - Sun, Dec 20

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Korean Air flights from Ontario to Seoul

Our best Korean Air deals on Ontario to Seoul flight tickets
Korean Air
Nov 3
ONT6:20 amOntario
18h 35m
1 stop
ICN5:55 pmIncheon Intl
Nov 9
ICN6:35 pmIncheon Intl
14h 37m
1 stop
ONT4:12 pmOntario
$1,083
Korean Air
Sep 1
ONT6:00 amOntario
17h 20m
1 stop
ICN3:20 pmIncheon Intl
Sep 8
ICN4:40 pmIncheon Intl
16h 40m
1 stop
ONT5:20 pmOntario
$1,109
Korean Air
Jul 12
ONT6:00 amOntario
17h 20m
1 stop
ICN3:20 pmIncheon Intl
Jul 15
ICN4:40 pmIncheon Intl
16h 41m
1 stop
ONT5:21 pmOntario
$1,379

Delta flights from Ontario to Seoul

Our best Delta deals on Ontario to Seoul flight tickets
Delta
Sep 14
ONT6:00 amOntario
17h 20m
1 stop
ICN3:20 pmIncheon Intl
Oct 20
ICN7:00 pmIncheon Intl
14h 12m
1 stop
ONT5:12 pmOntario
$1,106
Delta
Nov 9
ONT5:05 pmOntario
29h 50m
2 stops
ICN3:55 pmIncheon Intl
Nov 17
ICN4:10 pmIncheon Intl
17h 02m
2 stops
ONT4:12 pmOntario
$1,110
Delta
Nov 15
ONT5:05 pmOntario
30h 15m
1 stop
ICN4:20 pmIncheon Intl
Nov 23
ICN6:35 pmIncheon Intl
14h 37m
1 stop
ONT4:12 pmOntario
$1,112

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 July 7, 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

Wed 8/5

8:58 am-9:40 pm

1 stop20h 42m

Incheon Intl

Thu 8/27

8:30 pm-11:02 am

2 stops54h 32m

$897

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 8/5

8:58 am-9:40 pm

1 stop20h 42m

Incheon Intl

Thu 8/27

8:30 pm-11:02 am

2 stops54h 32m

$934

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/1

8:58 am-8:10 pm

1 stop19h 12m

Incheon Intl

Tue 8/25

7:20 am-2:03 pm

2 stops46h 43m

$935

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/24

8:48 am-9:40 pm

1 stop20h 52m

Incheon Intl

Mon 9/7

8:05 pm-6:40 pm

1 stop38h 35m

$974

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 8/16

8:58 am-9:40 pm

1 stop20h 42m

Incheon Intl

Sun 8/23

7:15 pm-11:02 am

1 stop31h 47m

$978

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/7

8:48 am-9:40 pm

1 stop20h 52m

Incheon Intl

Sun 9/13

8:05 pm-6:40 pm

1 stop38h 35m

$985

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/7

8:48 am-9:40 pm

1 stop20h 52m

Incheon Intl

Mon 9/14

7:15 pm-4:10 pm

2 stops36h 55m

$989

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/5

11:38 am-9:40 pm

1 stop18h 02m

Incheon Intl

Mon 10/19

8:35 pm-6:00 pm

1 stop37h 25m

$993
Quickest round-trip

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/1

8:58 am-8:10 pm

1 stop19h 12m

Incheon Intl

Sun 8/30

12:45 pm-6:40 pm

1 stop21h 55m

$1,000

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sat 12/5

6:00 am-10:05 pm

2 stops23h 05m

Seoul Gimpo Intl

Sun 12/20

8:00 am-11:53 am

2 stops20h 53m

$2,073

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 month to fly to Seoul?

The month of September is another great option to travel to Seoul, with average flight prices from Ontario averaging around $496.

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 $744. 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 $918.

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 $777 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 $1,001 per ticket.

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

14h 57m

Direct flights

None
The fastest flight from Ontario to Seoul takes 14h 57m
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 14h 57m.

  • 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
831 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