Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to Seoul from $475

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 8/24. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ontario to Seoul (ONT-SEL)

Cheap round-trip flights

Alaska Airlines Logo
8:35 am - 7:00 pmONT-ICN
18h 25m1 stop
Alaska Airlines Logo
9:25 pm - 10:44 amICN-ONT
29h 19m2 stops
$791Alaska Airlines
Find Deal
Sun, Aug 24 - Wed, Sep 3
Logo
10:13 pm - 8:30 pmONT-ICN
30h 17m1 stop
Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
$860
Find Deal
Sun, Sep 7 - Mon, Sep 22
Alaska Airlines Logo
8:35 am - 7:00 pmONT-ICN
18h 25m1 stop
Alaska Airlines Logo
9:25 pm - 9:26 amICN-ONT
28h 01m2 stops
$866Alaska Airlines
Find Deal
Thu, Aug 28 - Fri, Sep 5
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$895China Airlines
Find Deal
Mon, Jan 5 - Sun, Jan 18
China Airlines Logo
10:50 pm - 11:20 amONT-ICN
19h 30m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$898China Airlines
Find Deal
Mon, Feb 2 - Tue, Feb 24
Logo
6:00 am - 9:45 pmONT-ICN
23h 45m2 stops
Logo
6:20 pm - 11:38 pmICN-ONT
21h 18m1 stop
$914
Find Deal
Sun, Sep 7 - Mon, Sep 22
China Airlines Logo
10:50 pm - 7:15 pmONT-ICN
27h 25m1 stop
China Airlines Logo
12:30 pm - 4:50 pmICN-ONT
21h 20m1 stop
$917China Airlines
Find Deal
Tue, Jan 6 - Tue, Jan 20
Logo
12:10 am - 11:45 pmONT-ICN
31h 35m2 stops
Logo
8:20 am - 6:00 pmICN-ONT
25h 40m2 stops
$926
Find Deal
Tue, Sep 23 - Sat, Sep 27
Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:55 am - 6:47 pmGMP-ONT
26h 52m2 stops
$1,502Japan Airlines
Find Deal
Sun, Sep 7 - Mon, Sep 22
Japan Airlines Logo
6:00 am - 9:50 pmONT-GMP
23h 50m2 stops
Japan Airlines Logo
7:40 pm - 3:17 pmGMP-ONT
35h 37m2 stops
$1,672Japan Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 29

Alaska Airlines flights from Ontario to Seoul

Our best Alaska Airlines deals on Ontario to Seoul flight tickets
Alaska Airlines
Aug 24
ONT8:35 amOntario
18h 25m
1 stop
ICN7:00 pmIncheon Intl
Sep 3
ICN9:25 pmIncheon Intl
29h 19m
2 stops
ONT10:44 amOntario
$791
Find similar
Alaska Airlines
Aug 28
ONT8:35 amOntario
18h 25m
1 stop
ICN7:00 pmIncheon Intl
Sep 5
ICN9:25 pmIncheon Intl
28h 01m
2 stops
ONT9:26 amOntario
$866
Find similar
Alaska Airlines
Aug 28
ONT6:00 amOntario
45h 00m
2 stops
ICN7:00 pmIncheon Intl
Sep 6
ICN9:25 pmIncheon Intl
42h 29m
2 stops
ONT11:54 pmOntario
$966
Find similar

China Airlines flights from Ontario to Seoul

Our best China Airlines deals on Ontario to Seoul flight tickets
China Airlines
Jan 5
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Jan 18
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT4:50 pmOntario
$895
Find similar
China Airlines
Feb 2
ONT10:50 pmOntario
19h 30m
1 stop
ICN11:20 amIncheon Intl
Feb 24
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT4:50 pmOntario
$898
Find similar
China Airlines
Jan 6
ONT10:50 pmOntario
27h 25m
1 stop
ICN7:15 pmIncheon Intl
Jan 20
ICN12:30 pmIncheon Intl
21h 20m
1 stop
ONT4:50 pmOntario
$917
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 August 14, 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

Sun 8/24

8:35 am-7:00 pm

1 stop18h 25m

Incheon Intl

Wed 9/3

9:25 pm-10:44 am

2 stops29h 19m

$791

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/7

10:13 pm-8:30 pm

1 stop30h 17m

Incheon Intl

Mon 9/22

6:20 pm-11:38 pm

1 stop21h 18m

$860

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 8/28

8:35 am-7:00 pm

1 stop18h 25m

Incheon Intl

Fri 9/5

9:25 pm-9:26 am

2 stops28h 01m

$866

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 1/5

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 1/18

12:30 pm-4:50 pm

1 stop21h 20m

$895

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 2/2

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Tue 2/24

12:30 pm-4:50 pm

1 stop21h 20m

$898

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/7

6:00 am-9:45 pm

2 stops23h 45m

Incheon Intl

Mon 9/22

6:20 pm-11:38 pm

1 stop21h 18m

$914

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 1/6

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Tue 1/20

12:30 pm-4:50 pm

1 stop21h 20m

$917

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 9/23

12:10 am-11:45 pm

2 stops31h 35m

Incheon Intl

Sat 9/27

8:20 am-6:00 pm

2 stops25h 40m

$926

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Sun 9/7

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Mon 9/22

7:55 am-6:47 pm

2 stops26h 52m

$1,502

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Tue 10/14

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Wed 10/29

7:40 pm-3:17 pm

2 stops35h 37m

$1,672

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, Monday is the cheapest day to fly to Seoul from Ontario. The lowest ticket price found for a Monday departure recently was $819. 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 $988.

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 $833 when looking at flights departing in the morning. In the evening is when there is more demand to fly to Seoul, so prices are often more expensive at around $912 per ticket.

Can stopping save me money on Ontario to Seoul flights?

You could potentially save up to 13% 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

Best Price Found

$475

Fastest flight time

17h 12m

Direct flights

None

Airports in Seoul

2 airports
The best one-way flight to Seoul from Ontario in the past 72 hours is $475. The best round-trip flight deal from Ontario to Seoul found on momondo in the last 72 hours is $791.
The fastest flight from Ontario to Seoul takes 17h 12m
There are no direct flights from Ontario to Seoul. Popular non-direct routes for this connection are Ontario Airport - Incheon Intl Airport and Ontario Airport - Seoul Gimpo Intl Airport.
There are 2 airports near Seoul: Incheon Intl (ICN), Seoul Gimpo Intl (GMP)
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 18h 25m.

  • 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 $961Free CancellationRating
8.3
762 reviews
Search China Airlines flights
Korean AirPriceFrom $1,111Free CancellationRating
8.4
1,131 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.

An easier way to manage your Seoul trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/19
Tue 8/26
By creating a price alert you accept our terms of use and privacy policy.

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