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Ontario

$325+ Cheap flights from South Korea to Ontario (ONT)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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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 septiembre 17, 2025.

Round-trip from

$325
(Trip.com)

Popular in

October

Cheapest in

May

Average price

$582
From South Korea to Ontario
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 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 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 septiembre 17, 2025.

This Trip.com deal was found by Cheapflights users on 9/16. 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.
jue. 10/168:35 pmICN - ONT
1 stop32h 02mHawaiian Airlines
jue. 10/309:45 amONT - ICN
1 stop17h 40mHawaiian Airlines
Deal found 9/16$325
This Tourvis deal was found by Cheapflights users on 9/16. 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 Tourvis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/168:35 pmICN - ONT
1 stop19h 28mHawaiian Airlines
jue. 10/237:43 pmONT - ICN
1 stop30h 52mHawaiian Airlines
Deal found 9/16$331
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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.
lun. 9/228:35 pmICN - ONT
1 stop19h 28mHawaiian Airlines
vie. 9/2610:09 amONT - ICN
1 stop16h 51mHawaiian Airlines
Deal found 9/15$337
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 10/238:35 pmICN - ONT
1 stop19h 28mHawaiian Airlines
dom. 10/269:45 amONT - ICN
1 stop17h 40mHawaiian Airlines
Deal found 9/15$339
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
sáb. 10/258:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
dom. 10/269:45 amONT - ICN
1 stop17h 40mAlaska Airlines
Deal found 9/15$341
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 10/238:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
mié. 10/296:00 amONT - ICN
1 stop20h 35mAlaska Airlines
Deal found 9/15$347
This Hawaiian Airlines deal was found by Cheapflights users on 9/17. 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.
dom. 9/288:35 pmICN - ONT
1 stop30h 09mHawaiian Airlines
vie. 10/36:00 amONT - ICN
1 stop20h 35mHawaiian Airlines
Deal found 9/17$353
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
dom. 9/218:35 pmICN - ONT
1 stop30h 09mAlaska Airlines
mar. 9/2310:09 amONT - ICN
1 stop16h 51mAlaska Airlines
Deal found 9/15$358
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
dom. 9/218:35 pmICN - ONT
1 stop30h 09mAlaska Airlines
vie. 10/36:00 amONT - ICN
1 stop20h 35mAlaska Airlines
Deal found 9/15$359
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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.
sáb. 11/89:25 pmICN - ONT
1 stop36h 49mAlaska Airlines
sáb. 11/1511:59 amONT - ICN
1 stop37h 36mAlaska Airlines
Deal found 9/15$369
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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.
lun. 11/109:25 pmICN - ONT
2 stops30h 40mAlaska Airlines
sáb. 11/156:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Deal found 9/17$455
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
jue. 10/168:35 pmICN - ONT
1 stop19h 28mAlaska Airlines
lun. 10/276:11 pmONT - ICN
2 stops33h 14mAlaska Airlines
Deal found 9/16$463

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 septiembre 17, 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

dom. 10/26

8:35 pm-11:32 pm

1 stop18h 57m

Ontario

jue. 1/15

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

vie. 10/24

8:35 pm-12:03 am

1 stop19h 28m

Ontario

mié. 1/14

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

jue. 10/23

8:35 pm-12:03 am

1 stop19h 28m

Ontario

sáb. 1/17

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

sáb. 10/25

8:35 pm-12:03 am

1 stop19h 28m

Ontario

dom. 1/11

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

sáb. 10/25

8:35 pm-12:03 am

1 stop19h 28m

Ontario

jue. 1/15

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

dom. 10/26

8:35 pm-8:53 pm

1 stop16h 18m

Ontario

sáb. 1/17

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

jue. 10/23

8:35 pm-12:03 am

1 stop19h 28m

Ontario

jue. 1/15

6:00 am-6:35 pm

1 stop19h 35m

$347

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

dom. 9/28

8:35 pm-10:44 am

1 stop30h 09m

Ontario

vie. 10/3

6:00 am-6:35 pm

1 stop20h 35m

$353

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

sáb. 10/25

8:35 pm-12:03 am

1 stop19h 28m

Ontario

lun. 11/3

6:11 pm-7:25 pm

2 stops32h 14m

$463

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

vie. 10/31

8:35 pm-11:56 pm

2 stops43h 21m

Ontario

vie. 11/7

6:00 am-6:35 pm

1 stop19h 35m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 46 results
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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 $327). 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 septiembre 17, 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 septiembre 17, 2025.
Read through reviews of airlines operating flights from South Korea to Ontario, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 18h 57m. Airlines will cover a distance of 6006 mi.

  • 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 ($421), Korean Air ($624), and Japan Airlines ($774).

  • 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, 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 $327). 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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Alternative routes for South Korea to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$702FlexibilityNo cancel feeOn-time69%

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