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$446+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$802
(Kiwi.com)

One-way from

$446
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$951
From Ontario to South Korea
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One-way flight from Ontario to South Korea
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Highest demand for flights based on searches. 2% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/201:37 pmONT - ICN
2 stops34h 08mMultiple Airlines
Mon 9/226:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 9/10$853
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/3010:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Sat 11/89:20 pmICN - ONT
2 stops43h 20mMultiple Airlines
Deal found 9/9$888
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:10 amONT - ICN
2 stops24h 45mMultiple Airlines
Sat 10/117:50 amICN - ONT
2 stops26h 10mMultiple Airlines
Deal found 9/10$951
This oojo deal was found by Cheapflights users on 9/11. 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.
Tue 9/3012:10 amONT - ICN
1 stop27h 25mChina Airlines
Thu 10/1612:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/11$952
This oojo deal was found by Cheapflights users on 9/10. 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 9/2112:10 amONT - ICN
1 stop27h 25mChina Airlines
Wed 10/1512:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/10$953
This oojo deal was found by Cheapflights users on 9/10. 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.
Thu 10/212:10 amONT - ICN
1 stop27h 25mChina Airlines
Sat 10/1112:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/10$954
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Tue 9/3012:10 amONT - ICN
1 stop19h 05mChina Airlines
Wed 10/158:35 pmICN - ONT
1 stop37h 25mChina Airlines
Deal found 9/11$957
This Trip.com deal was found by Cheapflights users on 9/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:50 pmONT - ICN
1 stop27h 25mChina Airlines
Mon 11/1012:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 9/9$958
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/296:00 amONT - ICN
1 stop20h 35mMultiple Airlines
Sat 11/89:20 pmICN - ONT
2 stops43h 20mMultiple Airlines
Deal found 9/9$965
This oojo deal was found by Cheapflights users on 9/11. 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.
Mon 9/2912:10 amONT - PUS
1 stop26h 50mChina Airlines
Tue 10/710:20 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 9/11$1,009
This oojo deal was found by Cheapflights users on 9/11. 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 9/1412:45 amONT - PUS
1 stop26h 15mChina Airlines
Wed 9/1710:20 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 9/11$1,024
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:45 amONT - PUS
1 stop26h 15mChina Airlines
Sun 9/1412:15 pmPUS - ONT
1 stop22h 25mChina Airlines
Deal found 9/10$1,039

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 September 11, 2025.
Use the filters below to find and compare flights from Ontario to South Korea that are best for you.

Fly from

Ontario

Fly to

South Korea

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 11/8

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 11/23

12:30 pm-4:50 pm

1 stop21h 20m

$996

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Mon 9/29

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 10/7

10:20 am-6:00 pm

1 stop23h 40m

$1,009

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 11/26

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sat 12/6

8:15 pm-4:50 pm

1 stop37h 35m

$1,220

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/20

11:07 am-7:00 pm

1 stop39h 53m

Incheon Intl

Wed 11/19

9:25 pm-5:14 pm

1 stop36h 49m

$1,257

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 10/17

7:10 am-7:00 pm

2 stops43h 50m

Incheon Intl

Sat 10/25

8:35 pm-9:58 am

2 stops29h 23m

$1,275

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 10/3

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Fri 10/31

8:35 pm-8:53 pm

1 stop16h 18m

$1,276

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/16

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Sun 11/23

8:35 pm-11:55 pm

2 stops20h 20m

$1,308

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/6

6:36 pm-4:20 am

1 stop17h 44m

Incheon Intl

Fri 10/10

11:30 am-12:13 pm

1 stop16h 43m

$1,324

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Tue 9/23

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Wed 10/1

7:45 am-6:00 pm

2 stops26h 15m

$1,324

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 10/1

6:36 pm-4:20 am

1 stop17h 44m

Incheon Intl

Tue 10/14

4:50 pm-5:40 pm

1 stop16h 50m

$1,324

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 56 results
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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

What is the cheapest month to book a flight from Ontario to South Korea?

Currently, February is the cheapest month in which you can book a flight from Ontario to South Korea (average of $990). Flying from Ontario to South Korea in December is currently the most expensive (average of $1,633). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to KR?

Find hourly flight availability from Ontario to South Korea. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to South Korea as you normally would.

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 September 11, 2025.
Read through reviews of airlines operating flights from Ontario to South Korea, such as Korean Air, China Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
China Airlines
8.3
Very good
767 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,937 reviews
Korean Air
8.4
Very good
1,139 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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, Hawaiian Airlines, and Alaska Airlines can get you from Ontario to South Korea in just under 19h 30m. Your travel time can differ by up to 24h 20m. There are 6006 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 cheapest airlines to fly from Ontario to South Korea one-way?

    The cheapest airlines for a one-way flight from Ontario to South Korea are China Airlines ($580), Japan Airlines ($820), and Korean Air ($976).

  • 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.

  • What is the cheapest month to book a flight from Ontario to South Korea?

    Currently, February is the cheapest month in which you can book a flight from Ontario to South Korea (average of $990). Flying from Ontario to South Korea in December is currently the most expensive (average of $1,633). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Ontario to South Korea

Discover the top 2 airlines 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$930Average$1,065FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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