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Ontario

$336+ 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 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ONT
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$548
(United Airlines)

One-way from

$336
(Trip.com)

Popular in

August

Cheapest in

February

Average price

$729
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. 18% potential increase in price ($199 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/24. 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.
Thu 4/311:30 amICN - ONT
1 stop15h 35mUnited Airlines
Thu 4/176:39 pmONT - ICN
1 stop17h 41mUnited Airlines
Deal found 3/24$547
This Trip.com deal was found by Cheapflights users on 3/24. 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.
Mon 5/199:25 pmICN - ONT
1 stop16h 30mAlaska Airlines
Thu 6/59:50 amONT - ICN
1 stop17h 10mAlaska Airlines
Deal found 3/24$833
This Gotogate deal was found by Cheapflights users on 3/24. 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 4/178:35 pmICN - ONT
1 stop37h 25mChina Airlines
Sun 4/2012:10 amONT - ICN
1 stop27h 25mChina Airlines
Deal found 3/24$845
This American Airlines deal was found by Cheapflights users on 3/24. 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.
Thu 4/35:25 pmICN - ONT
2 stops20h 35mAmerican Airlines
Thu 4/1711:59 pmONT - ICN
1 stop23h 31mAmerican Airlines
Deal found 3/24$860
This Gotogate deal was found by Cheapflights users on 3/25. 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.
Fri 5/912:15 pmPUS - ONT
1 stop21h 45mChina Airlines
Fri 5/1612:10 amONT - PUS
1 stop26h 50mChina Airlines
Deal found 3/25$899
This Expedia deal was found by Cheapflights users on 3/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/206:20 pmICN - ONT
1 stop20h 26mMultiple Airlines
Tue 6/37:30 amONT - ICN
2 stops18h 25mMultiple Airlines
Deal found 3/24$928
This hutchgo.com deal was found by Cheapflights users on 3/25. 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 hutchgo.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/99:25 pmICN - ONT
1 stop16h 25mHawaiian Airlines
Thu 5/299:50 amONT - ICN
1 stop17h 10mHawaiian Airlines
Deal found 3/25$1,041
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 5/912:15 pmPUS - ONT
1 stop21h 45mMultiple Airlines
Sat 5/178:24 amONT - PUS
2 stops36h 26mMultiple Airlines
Deal found 3/25$1,251
This Delta deal was found by Cheapflights users on 3/25. 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 5/910:40 amPUS - ONT
2 stops27h 55mDelta
Sat 5/1711:46 amONT - PUS
2 stops39h 49mDelta
Deal found 3/25$1,258

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 March 26, 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 4/10

4:50 pm-5:51 pm

1 stop17h 01m

Ontario

Mon 4/14

6:00 am-3:00 pm

1 stop17h 00m

$548

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Mon 5/19

9:25 pm-9:55 pm

1 stop16h 30m

Ontario

Thu 6/5

9:50 am-7:00 pm

1 stop17h 10m

$833

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Thu 4/17

8:35 pm-6:00 pm

1 stop37h 25m

Ontario

Sun 4/20

12:10 am-7:35 pm

1 stop27h 25m

$845

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Fri 5/9

12:15 pm-6:00 pm

1 stop21h 45m

Ontario

Fri 5/16

12:10 am-7:00 pm

1 stop26h 50m

$899

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Tue 5/20

6:20 pm-10:46 pm

1 stop20h 26m

Ontario

Tue 6/3

6:00 am-5:55 pm

1 stop19h 55m

$924

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 4/23

5:25 pm-9:58 pm

2 stops20h 33m

Ontario

Tue 4/29

2:44 pm-3:30 pm

1 stop32h 46m

$954

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Wed 4/9

9:25 pm-9:50 pm

1 stop16h 25m

Ontario

Thu 5/29

9:50 am-7:00 pm

1 stop17h 10m

$1,041

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Fri 5/9

12:15 pm-6:00 pm

1 stop21h 45m

Ontario

Sat 5/17

8:24 am-12:50 pm

2 stops36h 26m

$1,251

BusanOntario

PUS - ONT

PUSONT

Busan Gimhae

Fri 5/9

10:40 am-10:35 pm

2 stops27h 55m

Ontario

Sat 5/17

11:46 am-7:35 pm

2 stops39h 49m

$1,258

IncheonOntario

ICN - ONT

ICNONT

Incheon Intl

Sun 5/25

6:20 pm-11:36 pm

1 stop21h 16m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 23 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 $324). 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 March 26, 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 March 26, 2025.
See what other customers who have flown with Japan Airlines, China Airlines and Alaska 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.
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
China Airlines
8.2
Very good
722 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Alaska Airlines
8.0
Very good
9,789 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Delta
8.0
Very good
7,891 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Hawaiian Airlines
7.9
Good
2,330 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Entertainment

7.8

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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 ($437), WestJet ($480), and Alaska Airlines ($539).

  • 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 $324). 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$674Average$782FlexibilityNo cancel feeOn-time69%
China AirlinesCheapest$978Average$1,146FlexibilityNo cancel feeOn-time70%
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