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Ontario

$495+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$512
(United Airlines)

One-way from

$495
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$766
Provider with most accurate pricing for Seoul (SEL)-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Los Angeles flights.
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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. 19% potential increase in price ($203 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/211:30 amICN - ONT
2 stops25h 23mUnited Airlines
Wed 5/76:00 amONT - ICN
1 stop17h 00mUnited Airlines
Deal found 4/29$512
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:20 pmICN - ONT
1 stop16h 05mMultiple Airlines
Thu 5/296:00 amONT - ICN
1 stop19h 55mMultiple Airlines
Deal found 4/29$779
This Hanatour deal was found by Cheapflights users on 4/28. 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.
Mon 5/59:25 pmICN - ONT
1 stop16h 25mHawaiian Airlines
Tue 5/209:50 amONT - ICN
1 stop17h 10mHawaiian Airlines
Deal found 4/28$819
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 5/79:25 pmICN - ONT
1 stop16h 25mAlaska Airlines
Tue 5/209:50 amONT - ICN
1 stop17h 10mAlaska Airlines
Deal found 4/28$846
This Gotogate deal was found by Cheapflights users on 4/28. 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 5/58:35 pmICN - ONT
1 stop37h 25mChina Airlines
Sat 5/1012:10 amONT - ICN
1 stop27h 25mChina Airlines
Deal found 4/28$852
This Kissandfly.com deal was found by Cheapflights users on 4/28. 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.
Sun 5/411:30 amICN - ONT
1 stop16h 54mLufthansa
Mon 5/191:45 pmONT - ICN
1 stop22h 35mLufthansa
Deal found 4/28$1,037
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1312:15 pmPUS - ONT
1 stop21h 45mChina Airlines
Thu 6/1912:10 amONT - PUS
1 stop26h 50mChina Airlines
Deal found 4/29$1,129
This Delta deal was found by Cheapflights users on 4/28. 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.
Thu 6/1210:40 amPUS - ONT
2 stops28h 06mDelta
Thu 6/196:25 amONT - PUS
2 stops33h 20mDelta
Deal found 4/28$1,377
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/132:15 pmPUS - ONT
1 stop18h 50mMultiple Airlines
Fri 6/2011:10 pmONT - PUS
1 stop24h 20mMultiple Airlines
Deal found 4/29$1,393
This EVA Air deal was found by Cheapflights users on 4/28. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/261:50 pmGMP - ONT
2 stops26h 23mMultiple Airlines
Thu 7/316:58 pmONT - GMP
2 stops25h 52mMultiple Airlines
Deal found 4/28$1,773

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 April 29, 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

Thu 5/22

4:50 pm-5:39 pm

1 stop16h 49m

Ontario

Mon 6/30

6:28 pm-3:00 pm

2 stops28h 32m

$512

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 5/21

6:20 pm-6:25 pm

1 stop16h 05m

Ontario

Thu 5/29

6:00 am-5:55 pm

1 stop19h 55m

$779

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/12

9:25 pm-9:50 pm

1 stop16h 25m

Ontario

Tue 5/20

9:50 am-7:00 pm

1 stop17h 10m

$846

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Fri 8/29

8:35 pm-6:40 pm

1 stop38h 05m

Ontario

Sat 9/6

12:45 am-7:35 pm

1 stop26h 50m

$858

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/19

9:25 pm-9:55 pm

1 stop16h 30m

Ontario

Fri 5/23

9:50 am-7:00 pm

1 stop17h 10m

$883

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Fri 6/13

12:15 pm-6:00 pm

1 stop21h 45m

Ontario

Thu 6/19

12:10 am-7:00 pm

1 stop26h 50m

$1,129

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Thu 6/12

10:40 am-10:46 pm

2 stops28h 06m

Ontario

Thu 6/19

6:25 am-7:45 am

2 stops33h 20m

$1,377

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Fri 6/13

2:15 pm-5:05 pm

1 stop18h 50m

Ontario

Fri 6/20

11:10 pm-3:30 pm

1 stop24h 20m

$1,393

SeoulOntario

GMP - ONT

GMPONT

Seoul Gimpo Intl

Sat 7/26

1:50 pm-12:13 am

2 stops26h 23m

Ontario

Thu 7/31

6:58 pm-12:50 pm

2 stops25h 52m

$1,773

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 5/21

9:00 pm-11:36 pm

3 stops42h 36m

$495

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 24 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 April 29, 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 April 29, 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
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very good
1,186 reviews
EVA Air
8.4
Very good
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Korean Air
8.4
Very good
1,066 reviews
EVA Air
8.4
Very good
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Japan Airlines
8.3
Very good
1,459 reviews
EVA Air
8.4
Very good
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
China Airlines
8.3
Very good
732 reviews
EVA Air
8.4
Very good
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Alaska Airlines
8.0
Very good
9,961 reviews
EVA Air
8.4
Very good
1,186 reviews

Overall

8.4

Crew

8.6

Food

8.1

Boarding

8.4

Comfort

8.3

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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 ($541), WestJet ($566), and Alaska Airlines ($592).

  • 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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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 2 airlines flying from South Korea to Ontario

Discover the top 2 airlines 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$755FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$978Average$1,146FlexibilityNo cancel feeOn-time70%

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