HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$338+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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.

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 November 3, 2025.

This United Airlines deal was found by Cheapflights users on 11/2. 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.
Mon 11/36:00 pmICN - ONT
1 stop21h 51mUnited Airlines
Fri 11/76:38 pmONT - ICN
1 stop28h 37mUnited Airlines
Deal found 11/2$517
This Kissandfly.com deal was found by Cheapflights users on 11/2. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/612:45 pmICN - ONT
1 stop16h 52mLufthansa
Wed 11/196:00 amONT - ICN
1 stop17h 15mLufthansa
Deal found 11/2$537
This Kissandfly.com deal was found by Cheapflights users on 11/3. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:00 pmICN - ONT
1 stop21h 51mLufthansa
Sun 11/236:38 pmONT - ICN
1 stop28h 37mLufthansa
Deal found 11/3$551
This Hanatour deal was found by Cheapflights users on 11/2. 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.
Sat 12/208:35 pmICN - ONT
1 stop20h 39mHawaiian Airlines
Fri 1/26:00 amONT - ICN
1 stop19h 35mHawaiian Airlines
Deal found 11/2$566
This Hanatour deal was found by Cheapflights users on 11/3. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/168:35 pmICN - ONT
1 stop19h 57mHawaiian Airlines
Wed 11/266:00 amONT - ICN
1 stop19h 35mHawaiian Airlines
Deal found 11/3$576
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Fri 11/76:00 pmICN - ONT
2 stops35h 30mUnited Airlines
Sun 4/194:15 pmONT - ICN
2 stops30h 45mUnited Airlines
Deal found 11/2$587
This Delta deal was found by Cheapflights users on 11/2. 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 11/38:05 pmICN - ONT
1 stop19h 36mDelta
Sun 11/165:49 pmONT - ICN
1 stop29h 41mDelta
Deal found 11/2$592
This Delta deal was found by Cheapflights users on 11/2. 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 11/78:05 pmICN - ONT
2 stops33h 11mDelta
Sun 4/1911:55 amONT - ICN
1 stop36h 35mDelta
Deal found 11/2$594
This Hanatour deal was found by Cheapflights users on 11/1. 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.
Fri 11/77:40 pmICN - ONT
1 stop18h 40mKorean Air
Sun 11/96:45 amONT - ICN
1 stop16h 10mKorean Air
Deal found 11/1$635
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:35 pmICN - ONT
1 stop17h 18mAlaska Airlines
Fri 11/146:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Deal found 11/3$645
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Wed 12/178:20 amGMP - ONT
2 stops24h 30mMultiple Airlines
Wed 12/2410:42 amONT - GMP
3 stops33h 08mMultiple Airlines
Deal found 11/1$2,881
This oojo deal was found by Cheapflights users on 11/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2111:50 amPUS - ONT
1 stop22h 00mChina Airlines
Sat 11/2910:50 pmONT - PUS
1 stop27h 00mChina Airlines
Deal found 11/3$4,507

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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$517
(United Airlines)

One-way from

$338
(Trip.com)

Popular in

October

Cheapest in

November

Average price

$507
Provider with most accurate pricing for Seoul (SEL)-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Los Angeles flights.
Search Deals
From South Korea to Ontario
Search Deals
One-way flight from South Korea to Ontario
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 3, 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 2/1

12:45 pm-10:53 pm

1 stop27h 08m

Ontario

Thu 2/5

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 2/2

12:45 pm-12:17 pm

1 stop16h 32m

Ontario

Sat 2/14

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 2/16

6:00 pm-10:57 pm

1 stop21h 57m

Ontario

Thu 2/26

1:45 pm-5:40 am

1 stop22h 55m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 2/9

6:00 pm-5:43 pm

1 stop16h 43m

Ontario

Tue 2/24

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 3/26

5:00 pm-10:37 pm

1 stop21h 37m

Ontario

Thu 4/9

6:53 pm-4:20 am

1 stop17h 27m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 2/6

12:45 pm-12:17 pm

1 stop16h 32m

Ontario

Sun 2/15

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 2/10

12:45 pm-5:43 pm

1 stop21h 58m

Ontario

Sat 2/21

1:53 pm-5:40 am

1 stop22h 47m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 2/1

12:45 pm-10:53 pm

1 stop27h 08m

Ontario

Mon 2/23

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 2/6

12:45 pm-12:17 pm

1 stop16h 32m

Ontario

Sat 2/14

6:00 am-4:15 pm

1 stop17h 15m

$517

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 5/1

4:50 pm-5:47 pm

1 stop16h 57m

Ontario

Sun 5/10

6:00 am-4:20 am

1 stop30h 20m

$517

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 46 results
1
2
3
...
5

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, February is the cheapest month in which you can book a flight from South Korea to Ontario (average of $404). Flying from South Korea to Ontario in January is currently the most expensive (average of $547). 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 November 3, 2025.

One of the essential ways to save on airfare from South Korea to Ontario is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 34% on airfare.

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

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

Travelers seeking maximum savings on their South Korea to Ontario flight should consider departing on Tuesday afternoons 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.

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.

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

    Departing from South Korea to Ontario will take you 27h 08m. Airlines will cover a distance of 6006 mi. This flight may include one or multiple stops.

  • 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 ($417), China Airlines ($433), and Japan Airlines ($827).

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

    Most travelers choose Incheon Intl - Ontario, Seoul Gimpo Intl - Ontario or Busan Gimhae - 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, February is the cheapest month in which you can book a flight from South Korea to Ontario (average of $404). Flying from South Korea to Ontario in January is currently the most expensive (average of $547). 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.
Incheon Intl to Los Angeles flights
Manila to Los Angeles flights
Haneda to Los Angeles flights
Narita to Los Angeles flights
New Delhi to San Francisco flights
Manila to San Francisco flights
Haneda to San Francisco flights
Taiwan Taoyuan Intl to Los Angeles flights
Taiwan Taoyuan Intl to San Francisco flights
Mumbai to San Francisco flights
Hong Kong to Los Angeles flights
Singapore to Los Angeles flights
Hongqiao Intl to San Francisco flights
Incheon Intl to San Francisco flights
Hongqiao Intl to Los Angeles flights
Ho Chi Minh City to Los Angeles flights
Suvarnabhumi to Los Angeles flights
Pu Dong to San Francisco flights
Yerevan to Los Angeles flights
Pu Dong to Los Angeles flights
Narita to San Diego flights
Gimpo Intl to Los Angeles flights
Narita to San Francisco flights
Incheon Intl to Ontario flights
Bangalore to San Francisco flights
Hyderabad to San Francisco flights
Soekarno-Hatta Intl to Los Angeles flights
Incheon Intl to Las Vegas flights
Mumbai to Los Angeles flights
Haneda to Ontario flights
Singapore to San Francisco flights
New Delhi to Los Angeles flights
Narita to Ontario flights
Suvarnabhumi to San Francisco flights
Chennai to San Francisco flights
Kansai Intl to Los Angeles flights
Manila to Ontario flights
Taiwan Taoyuan Intl to Ontario flights
Capital to San Francisco flights
Gimpo Intl to San Francisco flights
Hong Kong to San Francisco flights
Manila to Las Vegas flights
New Delhi to San Jose flights
Singapore to Ontario flights
Lahore to Los Angeles flights
Mumbai to Oakland flights
Sung Shan to Los Angeles flights
Mumbai to San Jose flights

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.