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$375+ Cheap flights from Ontario (ONT) to South Korea

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Aug 25 — Sep 11
Tue 8/25
Tue 9/1
1 adult, Economy
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Cheap flight deals from Ontario to South Korea

Cheapest flights from Ontario to South Korea
Explore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 26, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:07 pm
ONT
-
ICN
1 stop17h 33m
Multiple Airlines
Mon 10/57:15 pm
ICN
-
ONT
1 stop16h 21m
Multiple Airlines
Deal found 7/25$808
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:07 pm
ONT
-
ICN
1 stop17h 33m
Multiple Airlines
Wed 10/77:15 pm
ICN
-
ONT
1 stop34h 45m
Multiple Airlines
Deal found 7/25$832
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:48 am
ONT
-
ICN
1 stop19h 22m
Multiple Airlines
Sat 8/296:00 pm
ICN
-
ONT
2 stops30h 03m
Multiple Airlines
Deal found 7/21$853
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:30 pm
ONT
-
ICN
2 stops47h 00m
Multiple Airlines
Mon 10/57:15 pm
ICN
-
ONT
1 stop16h 21m
Multiple Airlines
Deal found 7/25$866
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:44 pm
ONT
-
ICN
2 stops35h 56m
Multiple Airlines
Mon 10/57:15 pm
ICN
-
ONT
1 stop16h 21m
Multiple Airlines
Deal found 7/25$874
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:30 pm
ONT
-
ICN
2 stops39h 10m
Multiple Airlines
Mon 10/57:15 pm
ICN
-
ONT
1 stop16h 21m
Multiple Airlines
Deal found 7/25$875
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:30 pm
ONT
-
ICN
2 stops47h 00m
Multiple Airlines
Wed 10/77:15 pm
ICN
-
ONT
1 stop34h 45m
Multiple Airlines
Deal found 7/25$890
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3011:38 am
ONT
-
ICN
1 stop17h 42m
Multiple Airlines
Mon 11/27:45 pm
ICN
-
ONT
2 stops37h 25m
Multiple Airlines
Deal found 7/23$892
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:44 pm
ONT
-
ICN
2 stops35h 56m
Multiple Airlines
Wed 10/77:15 pm
ICN
-
ONT
1 stop34h 45m
Multiple Airlines
Deal found 7/25$897
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:49 pm
ONT
-
ICN
2 stops39h 41m
Multiple Airlines
Wed 9/307:15 pm
ICN
-
ONT
1 stop34h 45m
Multiple Airlines
Deal found 7/23$903
This oojo deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:45 am
ONT
-
PUS
1 stop26h 15m
China Airlines
Fri 10/2310:30 am
PUS
-
ONT
1 stop23h 30m
China Airlines
Deal found 7/26$980
This FlightHub deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:45 am
ONT
-
PUS
1 stop26h 15m
China Airlines
Thu 8/2710:30 am
PUS
-
ONT
1 stop24h 10m
China Airlines
Deal found 7/25$1,020

Find flight deals from Ontario to South Korea

Keep the following information in mind while searching for Ontario to South Korea flight deals. Data was last updated July 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$808
(Kiwi.com)

One-way from

$375
(Trip.com)

Popular in

June

Cheapest in

August

Average price

$1,061
Provider with most accurate pricing for Los Angeles Los Angeles-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles Los Angeles-Seoul (SEL) flights.
Search Deals
From Ontario to South Korea
Search Deals
One-way flight from Ontario to South Korea
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($174 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to South Korea 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, Cheapflights users made 2,558,603 searches. Data last updated July 26, 2026.
Use the filters below to find and compare flights from Ontario to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 10/24

11:50 pm-10:50 am

1 stop19h 00m

Busan Gimhae

Sun 11/8

10:10 am-5:05 pm

1 stop23h 55m

$1,024

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Mon 8/24

12:45 am-7:00 pm

1 stop26h 15m

Busan Gimhae

Fri 8/28

10:30 am-6:40 pm

1 stop24h 10m

$1,069

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 9/9

12:45 am-9:30 am

1 stop16h 45m

Busan Gimhae

Mon 9/14

10:30 am-6:40 pm

1 stop24h 10m

$1,070

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/21

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Tue 10/6

8:35 pm-6:00 pm

1 stop37h 25m

$1,073

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/27

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Sat 10/10

12:35 pm-6:00 pm

1 stop21h 25m

$1,073

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 8/30

12:45 am-11:15 am

1 stop18h 30m

Busan Gimhae

Tue 10/6

10:30 am-6:00 pm

1 stop23h 30m

$1,100

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 9/6

12:45 am-7:55 pm

1 stop27h 10m

Busan Gimhae

Wed 10/14

12:15 pm-6:00 pm

1 stop21h 45m

$1,126

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 10/29

6:00 am-4:20 pm

1 stop18h 20m

Incheon Intl

Thu 11/12

6:45 pm-5:17 pm

1 stop15h 32m

$1,156

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 10/25

5:03 pm-3:55 pm

2 stops30h 52m

Incheon Intl

Fri 10/30

4:10 pm-11:55 pm

2 stops23h 45m

$1,161

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 9/16

12:10 am-9:30 am

1 stop17h 20m

Busan Gimhae

Sun 9/27

12:15 pm-6:00 pm

1 stop21h 45m

$1,170

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to South Korea

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing South Korea

Get insights into the airlines that provide service to South Korea. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to South Korea. Reviews last updated July 26, 2026.
Read through reviews of airlines operating flights from Ontario to South Korea, such as China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
838 reviews

Overall

8.3

Comfort

8.0

Crew

8.5

Food

7.8

Entertainment

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
China Airlines
8.3
Very good
838 reviews
China Airlines
8.3
Very good
838 reviews

Overall

8.3

Comfort

8.0

Crew

8.5

Food

7.8

Entertainment

8.0

Boarding

8.3

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.

Related info for your journey

Find useful and relevant information for your journey from Ontario to South Korea. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to South Korea?

    If you book a flight to South Korea from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to South Korea?

    China Airlines, Delta, and Korean Air can get you from Ontario to South Korea in just under 16h 45m. Your travel time can differ by up to 4h 50m. There are 6004 mi between Ontario and South Korea. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Ontario to South Korea?

    While some choose either Ontario - Seoul Gimpo Intl or Ontario - Busan Gimhae, Ontario - Incheon Intl is the most popular route from Ontario to South Korea.

  • Can I find deals for flights from Ontario to South Korea that include hotel bookings?

    Yes. In addition to deals on Ontario to South Korea flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to South Korea?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to South Korea.

  • Can I find deals for business class flights from Ontario to South Korea?

    Yes. Cheapflights offers flight deals from Ontario to South Korea by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ontario to South Korea

Discover the top airline that operate flights from Ontario to South Korea. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$854Average$944FlexibilityNo cancel feeOn-time70%

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