HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$384+ Cheap flights from South Korea to Ontario (ONT)

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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from South Korea to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from South Korea to Ontario

Keep the following information in mind while searching for South Korea to Ontario flight deals. Data was last updated July 30, 2025.

Round-trip from

$478
(United Airlines)

One-way from

$384
(Trip.com)

Popular in

January

Cheapest in

May

Average price

$790
From South Korea to Ontario
Search Deals
One-way flight from South Korea to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from South Korea to Ontario

Cheapest flights from South Korea to Ontario
Explore the most affordable flight options available from South Korea to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/314:50 pmICN - ONT
1 stop19h 43mUnited Airlines
Sun 9/76:38 pmONT - ICN
2 stops28h 22mUnited Airlines
Deal found 7/30$478
This Hawaiian Airlines deal was found by Cheapflights users on 7/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/258:35 pmICN - ONT
1 stop19h 28mHawaiian Airlines
Thu 10/27:47 pmONT - ICN
1 stop30h 48mHawaiian Airlines
Deal found 7/30$580
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/158:35 pmICN - ONT
1 stop17h 18mAlaska Airlines
Sat 2/76:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Deal found 7/30$592
This Hanatour deal was found by Cheapflights users on 7/29. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:20 pmICN - ONT
1 stop19h 20mDelta
Wed 11/56:37 amONT - ICN
1 stop16h 53mDelta
Deal found 7/29$617
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 8/295:25 pmICN - ONT
2 stops34h 07mAmerican Airlines
Thu 9/412:45 pmONT - ICN
1 stop34h 45mAmerican Airlines
Deal found 7/30$645
This Korean Air deal was found by Cheapflights users on 7/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:40 pmICN - ONT
1 stop20h 02mKorean Air
Tue 9/306:00 amONT - ICN
1 stop17h 20mKorean Air
Deal found 7/30$701
This China Airlines deal was found by Cheapflights users on 7/29. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:20 amPUS - ONT
1 stop24h 20mChina Airlines
Sun 9/1412:45 amONT - PUS
1 stop26h 15mChina Airlines
Deal found 7/29$870

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Korea to Ontario 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 30, 2025.
Use the filters below to find and compare flights from South Korea to Ontario that are best for you.

Fly from

South Korea

Fly to

Ontario

Route

Depart

Return

Price

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 8/31

4:50 pm-8:33 pm

1 stop19h 43m

Ontario

Sun 9/7

6:38 pm-3:00 pm

2 stops28h 22m

$478

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 9/25

8:35 pm-12:03 am

1 stop19h 28m

Ontario

Thu 10/2

7:47 pm-6:35 pm

1 stop30h 48m

$580

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sat 11/15

8:35 pm-8:53 pm

1 stop17h 18m

Ontario

Sat 2/7

6:00 am-6:35 pm

1 stop19h 35m

$592

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 9/25

7:20 pm-10:40 pm

1 stop19h 20m

Ontario

Wed 11/5

6:37 am-4:30 pm

1 stop16h 53m

$617

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 8/29

5:25 pm-11:32 am

2 stops34h 07m

Ontario

Thu 9/4

12:45 pm-3:30 pm

1 stop34h 45m

$645

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 9/17

7:40 pm-11:42 pm

1 stop20h 02m

Ontario

Thu 9/25

6:00 am-4:30 pm

1 stop18h 30m

$701

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Tue 9/9

10:20 am-6:40 pm

1 stop24h 20m

Ontario

Sun 9/14

12:45 am-7:00 pm

1 stop26h 15m

$870

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 10/31

6:55 pm-11:40 pm

1 stop20h 45m

$384

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 9/7

11:30 am-5:37 pm

1 stop22h 07m

$396

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Tue 8/19

3:50 pm-5:40 pm

3 stops41h 50m

$475

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 18 results
1
2

Best time to book a flight from South Korea to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from South Korea 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 South Korea to Ontario

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

Currently, August is the cheapest month in which you can book a flight from South Korea to Ontario (average of $246). Flying from South Korea to Ontario in March is currently the most expensive (average of $328). 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 KR to ONT?

Find hourly flight availability from South Korea to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from South Korea to Ontario, such as EVA Air, Korean Air, and Japan Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,222 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,121 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,536 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
754 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,222 reviews

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Food

8.1

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

Related info for your journey

Find useful and relevant information for your journey from South Korea to Ontario. 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 into for flights to Ontario from South Korea?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from South Korea. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • What are the cheapest airlines to fly from South Korea to Ontario one-way?

    The cheapest airlines for a one-way flight from South Korea to Ontario are United Airlines ($396), China Airlines ($510), and Alaska Airlines ($543).

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

    Most travelers choose Incheon Intl - Ontario, Busan Gimhae - Ontario or Seoul Gimpo Intl - Ontario when deciding on the best route from South Korea to Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from South Korea to Ontario 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 South Korea to Ontario?

    Currently, August is the cheapest month in which you can book a flight from South Korea to Ontario (average of $246). Flying from South Korea to Ontario in March is currently the most expensive (average of $328). 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

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

Alternative routes for South Korea to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Haneda to Los Angeles flights
Incheon Intl to Los Angeles flights
Manila to Los Angeles flights
Narita to Los Angeles flights
Taiwan Taoyuan Intl to Los Angeles flights
New Delhi to San Francisco flights
Mumbai to San Francisco flights
Taiwan Taoyuan Intl to San Francisco flights
Incheon Intl to San Francisco flights
Kuala Lumpur Intl to San Francisco flights
Suvarnabhumi to Los Angeles flights
Manila to San Francisco flights
Bangalore to San Francisco flights
Haneda to San Francisco flights
Hongqiao Intl to Los Angeles flights
Hong Kong to Los Angeles flights
Hongqiao Intl to San Francisco flights
Ho Chi Minh City to Los Angeles flights
New Delhi to San Jose flights
Suvarnabhumi to San Francisco flights
Narita to San Francisco flights
New Delhi to Los Angeles flights
New Delhi to Oakland flights
Pu Dong to Los Angeles flights
Pu Dong to San Francisco flights
Kansai Intl to Los Angeles flights
Yerevan to Los Angeles flights
Mumbai to Los Angeles flights
Incheon Intl to Las Vegas flights
Hyderabad to San Francisco flights
Gimpo Intl to Los Angeles flights
Hong Kong to San Francisco flights
Sung Shan to Los Angeles flights
Singapore to Los Angeles flights
Narita to Ontario flights
Taiwan Taoyuan Intl to Ontario flights
Haneda to Ontario flights
Narita to San Diego flights
Incheon Intl to Ontario flights
Manila to Ontario flights
Manila to Las Vegas flights
Mumbai to San Jose flights
Singapore to San Francisco flights
Chennai to San Francisco flights
Gimpo Intl to San Francisco flights
Ho Chi Minh City to San Francisco flights
Capital to San Francisco flights
Ahmedabad to Los Angeles flights
Soekarno-Hatta Intl to Los Angeles flights

Top airline flying from South Korea to Ontario

Discover the top airline that operate flights from South Korea to Ontario. 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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$755FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.