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$515+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
May 8 — May 151
Fri 5/8
Fri 5/15
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 April 8, 2026.

This Super.com deal was found by Cheapflights users on 4/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:45 am
ONT
-
ICN
1 stop26h 20m
China Airlines
Wed 9/912:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/5$895
This Super.com deal was found by Cheapflights users on 4/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:45 am
ONT
-
ICN
1 stop26h 20m
China Airlines
Fri 9/1112:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/7$898
This Super.com deal was found by Cheapflights users on 4/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Wed 9/212:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/7$907
This SmartFares deal was found by Cheapflights users on 4/3. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:45 am
ONT
-
ICN
1 stop26h 20m
China Airlines
Sun 9/612:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/3$911
This SmartFares deal was found by Cheapflights users on 4/7. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3112:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Wed 9/168:35 pm
ICN
-
ONT
1 stop37h 25m
China Airlines
Deal found 4/7$914
This SmartFares deal was found by Cheapflights users on 4/7. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Fri 9/412:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/7$917
This FlightHub deal was found by Cheapflights users on 4/8. 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.
Thu 8/2012:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Mon 8/3112:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 4/8$929
This Gotogate deal was found by Cheapflights users on 4/6. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:10 am
ONT
-
ICN
1 stop27h 25m
China Airlines
Thu 10/228:35 pm
ICN
-
ONT
1 stop37h 25m
China Airlines
Deal found 4/6$934
This Super.com deal was found by Cheapflights users on 4/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2612:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Thu 5/712:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 4/7$942
This Super.com deal was found by Cheapflights users on 4/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Wed 5/1312:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 4/8$947
This SmartFares deal was found by Cheapflights users on 4/8. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2312:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Mon 9/148:05 pm
ICN
-
ONT
1 stop38h 35m
China Airlines
Deal found 4/8$949
This oojo deal was found by Cheapflights users on 4/4. 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 9/312:45 am
ONT
-
PUS
1 stop18h 30m
China Airlines
Fri 9/1812:15 pm
PUS
-
ONT
1 stop21h 45m
China Airlines
Deal found 4/4$949

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 April 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$895
(Super.com)

One-way from

$515
(Super.com)

Popular in

December

Cheapest in

September

Average price

$892
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. 4% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 8, 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

Tue 9/29

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Wed 10/28

11:50 am-5:50 pm

1 stop22h 00m

$993

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 9/5

12:45 am-11:15 am

1 stop18h 30m

Busan Gimhae

Wed 9/9

12:15 pm-6:40 pm

1 stop22h 25m

$1,041

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Thu 8/20

12:45 am-9:30 am

1 stop16h 45m

Busan Gimhae

Fri 9/4

12:15 pm-6:40 pm

1 stop22h 25m

$1,071

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Thu 9/17

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Fri 10/2

8:00 pm-6:00 pm

1 stop38h 00m

$1,125

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Thu 9/3

12:45 am-9:30 am

1 stop16h 45m

Busan Gimhae

Sun 9/13

8:00 pm-11:16 am

2 stops31h 16m

$1,146

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Mon 9/21

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 10/6

12:15 pm-6:00 pm

1 stop21h 45m

$1,169

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 4/25

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Sun 5/10

8:00 pm-6:00 pm

1 stop38h 00m

$1,187

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Tue 5/5

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Sat 6/20

12:15 pm-6:00 pm

1 stop21h 45m

$1,213

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Wed 5/6

12:10 am-5:30 pm

1 stop25h 20m

Jeju City

Mon 5/11

10:20 am-6:00 pm

1 stop23h 40m

$1,237
Quickest round-trip

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 4/20

6:00 am-3:00 pm

1 stop17h 00m

Incheon Intl

Mon 5/11

11:30 am-9:41 am

1 stop14h 11m

$1,306

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/7

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

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

Currently, April is the cheapest month in which you can book a flight from Ontario to South Korea (average of $355). Flying from Ontario to South Korea in January is currently the most expensive (average of $494). 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 April 8, 2026.

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 78% on your trip compared to booking a flight in the evening.

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 March 30, 2025.

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 April 8, 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
816 reviews

Boarding

8.3

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
816 reviews
China Airlines
8.3
Very good
816 reviews

Boarding

8.3

Food

7.8

Crew

8.5

Entertainment

8.0

Overall

8.3

Comfort

8.0

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, United Airlines, and Delta can get you from Ontario to South Korea in just under 17h. Your travel time can differ by up to 2h 05m. 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 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, April is the cheapest month in which you can book a flight from Ontario to South Korea (average of $355). Flying from Ontario to South Korea in January is currently the most expensive (average of $494). 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

Browse thousands of different options on Cheapflights for your next trip

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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 April 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$854Average$948FlexibilityNo cancel feeOn-time70%

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