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$434+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
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 December 21, 2025.

This oojo deal was found by Cheapflights users on 12/18. 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.
Wed 12/3110:50 pmONT - ICN
1 stop19h 30mChina Airlines
Wed 1/2112:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 12/18$1,259
This oojo deal was found by Cheapflights users on 12/18. 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 12/3010:50 pmONT - ICN
1 stop27h 25mChina Airlines
Wed 1/2112:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 12/18$1,462
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:38 amONT - ICN
1 stop16h 17mDelta
Tue 1/138:05 pmICN - ONT
1 stop19h 46mDelta
Deal found 12/20$1,576
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:38 amONT - ICN
1 stop16h 52mDelta
Wed 12/318:05 pmICN - ONT
2 stops19h 28mDelta
Deal found 12/20$1,580
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:10 pmONT - ICN
2 stops29h 45mDelta
Wed 12/318:05 pmICN - ONT
1 stop33h 27mDelta
Deal found 12/20$1,591
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:10 pmONT - ICN
2 stops54h 20mDelta
Wed 12/318:05 pmICN - ONT
2 stops43h 28mDelta
Deal found 12/20$1,606
This oojo deal was found by Cheapflights users on 12/18. 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 12/2510:50 pmONT - ICN
1 stop19h 30mChina Airlines
Sun 1/1812:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 12/18$1,615
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:38 amONT - ICN
1 stop16h 52mDelta
Sun 12/288:05 pmICN - ONT
1 stop14h 03mDelta
Deal found 12/20$1,626
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:15 pmONT - ICN
2 stops34h 15mDelta
Wed 12/318:05 pmICN - ONT
1 stop33h 27mDelta
Deal found 12/20$1,641
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:42 amONT - ICN
1 stop35h 13mDelta
Wed 12/318:05 pmICN - ONT
1 stop33h 27mDelta
Deal found 12/20$1,648
This KAYAK deal was found by Cheapflights users on 12/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:50 pmONT - PUS
1 stop27h 00mChina Airlines
Mon 1/57:50 pmPUS - ONT
1 stop38h 00mChina Airlines
Deal found 12/20$2,885
This American Airlines deal was found by Cheapflights users on 12/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2111:59 pmONT - GMP
2 stops29h 06mMultiple Airlines
Sun 12/288:00 amGMP - ONT
2 stops20h 53mMultiple Airlines
Deal found 12/20$3,255

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 December 21, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$924
(Kiwi.com)

One-way from

$434
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,233
Provider with most accurate pricing for Los Angeles-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for 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. 2% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 21, 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

Thu 4/9

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Mon 4/20

8:05 pm-6:00 pm

1 stop37h 55m

$942

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 1/17

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Mon 3/16

7:50 pm-5:50 pm

1 stop38h 00m

$946

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Tue 3/17

11:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Sun 3/29

12:15 pm-6:00 pm

1 stop21h 45m

$959

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 1/17

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Sat 1/24

11:50 am-4:50 pm

1 stop22h 00m

$968

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Thu 3/19

11:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Tue 3/31

10:30 am-6:00 pm

1 stop23h 30m

$1,006

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 3/18

11:50 pm-10:50 am

1 stop19h 00m

Busan Gimhae

Tue 3/31

10:30 am-6:00 pm

1 stop23h 30m

$1,006

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 3/12

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 4/9

12:45 pm-6:00 pm

1 stop21h 15m

$1,024

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Thu 1/8

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Thu 1/29

11:50 am-4:50 pm

1 stop22h 00m

$1,032

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 3/12

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Fri 4/10

12:45 pm-6:00 pm

1 stop21h 15m

$1,034

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 1/17

10:50 pm-8:00 pm

1 stop28h 10m

Busan Gimhae

Mon 3/16

9:15 pm-4:50 pm

2 stops59h 35m

$1,036

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 58 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 $354). Flying from Ontario to South Korea in June is currently the most expensive (average of $531). 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 December 21, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to South Korea at noon. If you’re flexible enough to do this you can expect to save up to 91% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Ontario to South Korea?

Use this chart to determine the cheapest time to fly round-trip from Ontario to South Korea. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ontario to South Korea flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 21, 2025.
Read through reviews of airlines operating flights from Ontario to South Korea, such as Korean Air and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
1,185 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
792 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Crew

8.7

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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 and Korean Air can get you from Ontario to South Korea in just under 20h 45m. Your travel time can differ by up to 6h 10m. There are 5984 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 - Busan Gimhae or Ontario - Seoul Gimpo Intl, 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 $354). Flying from Ontario to South Korea in June is currently the most expensive (average of $531). 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$892Average$1,022FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,246FlexibilityNo cancel feeOn-time81%

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