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Ontario

$466+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$625
(United Airlines)

One-way from

$466
(Kiwi.com)

Popular in

August

Cheapest in

May

Average price

$607
From South Korea to Ontario
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One-way flight from South Korea to Ontario
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Highest demand for flights based on searches. 15% potential increase in price ($144 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/12. 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 11/106:00 pmICN - ONT
2 stops35h 33mUnited Airlines
Fri 11/146:00 amONT - ICN
1 stop17h 15mUnited Airlines
Deal found 6/12$625
This Kissandfly.com deal was found by Cheapflights users on 6/10. 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.
Mon 6/164:50 pmICN - ONT
1 stop21h 55mLufthansa
Sun 6/296:10 amONT - ICN
1 stop16h 50mLufthansa
Deal found 6/10$801
This Gotogate deal was found by Cheapflights users on 6/9. 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.
Thu 9/412:35 pmICN - ONT
1 stop22h 05mChina Airlines
Wed 10/2212:10 amONT - ICN
1 stop27h 25mChina Airlines
Deal found 6/9$816
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:45 pmICN - ONT
2 stops18h 48mMultiple Airlines
Tue 9/236:50 pmONT - ICN
2 stops29h 15mMultiple Airlines
Deal found 6/10$910
This Vakatrip deal was found by Cheapflights users on 6/12. 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 Vakatrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/810:20 amPUS - ONT
1 stop24h 20mChina Airlines
Sat 7/1212:45 amONT - PUS
1 stop26h 15mChina Airlines
Deal found 6/12$921
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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 9/19:25 pmICN - ONT
2 stops32h 44mAlaska Airlines
Fri 9/58:35 amONT - ICN
1 stop18h 25mAlaska Airlines
Deal found 6/9$961
This Korean Air deal was found by Cheapflights users on 6/9. 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.
Mon 11/107:00 amPUS - ONT
2 stops27h 17mKorean Air
Wed 12/36:45 amONT - PUS
2 stops39h 30mKorean Air
Deal found 6/9$1,259
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/211:00 amPUS - ONT
2 stops47h 40mMultiple Airlines
Mon 7/712:45 amONT - PUS
1 stop27h 10mMultiple Airlines
Deal found 6/10$1,373
This Delta deal was found by Cheapflights users on 6/10. 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.
Wed 7/27:00 amPUS - ONT
2 stops31h 45mDelta
Tue 7/81:15 pmONT - PUS
2 stops37h 05mDelta
Deal found 6/10$1,410
This Japan Airlines deal was found by Cheapflights users on 6/12. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:40 pmGMP - ONT
2 stops36h 34mJapan Airlines
Fri 11/146:00 amONT - GMP
2 stops23h 20mJapan Airlines
Deal found 6/12$2,385
This American Airlines deal was found by Cheapflights users on 6/10. 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 8/107:55 amGMP - ONT
2 stops26h 30mMultiple Airlines
Sat 5/26:43 amONT - GMP
2 stops23h 07mMultiple Airlines
Deal found 6/10$3,234

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 June 12, 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

Mon 11/10

6:00 pm-12:33 pm

2 stops35h 33m

Ontario

Fri 11/14

6:00 am-4:15 pm

1 stop17h 15m

$625

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 9/4

12:35 pm-6:40 pm

1 stop22h 05m

Ontario

Wed 10/22

12:10 am-7:35 pm

1 stop27h 25m

$816

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 9/16

5:45 pm-8:33 pm

2 stops18h 48m

Ontario

Tue 9/23

6:50 pm-4:05 pm

2 stops29h 15m

$910

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Tue 7/8

10:20 am-6:40 pm

1 stop24h 20m

Ontario

Sat 7/12

12:45 am-7:00 pm

1 stop26h 15m

$921

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 9/1

9:25 pm-2:09 pm

2 stops32h 44m

Ontario

Fri 9/5

8:35 am-7:00 pm

1 stop18h 25m

$961

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Mon 11/10

7:00 am-5:17 pm

2 stops27h 17m

Ontario

Wed 12/3

6:45 am-3:15 pm

2 stops39h 30m

$1,259

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Wed 7/2

11:00 am-6:40 pm

2 stops47h 40m

Ontario

Mon 7/7

12:45 am-7:55 pm

1 stop27h 10m

$1,373

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Wed 7/2

7:00 am-10:45 pm

2 stops31h 45m

Ontario

Tue 7/8

1:15 pm-6:20 pm

2 stops37h 05m

$1,410

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Mon 11/10

7:40 pm-3:14 pm

2 stops36h 34m

Ontario

Fri 11/14

6:00 am-10:20 pm

2 stops23h 20m

$2,385

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Sun 8/10

7:55 am-6:25 pm

2 stops26h 30m

Ontario

Sat 5/2

6:43 am-9:50 pm

2 stops23h 07m

$3,234

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 28 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 $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 June 12, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
See what other customers who have flown with EVA Air, Korean Air and Japan Airlines from South Korea to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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
1,489 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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
1,202 reviews

Boarding

8.4

Food

8.1

Crew

8.6

Comfort

8.3

Overall

8.4

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 China Airlines ($515), EVA Air ($655), and United Airlines ($679).

  • 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 $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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$755FlexibilityNo cancel feeOn-time69%

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