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$461+ Cheap flights from Ontario (ONT) to South Korea

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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Ontario to South Korea

Keep the following information in mind while searching for Ontario to South Korea flight deals. Data was last updated July 30, 2025.

Round-trip from

$858
(Kiwi.com)

One-way from

$475
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$1,164
From Ontario to South Korea
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One-way flight from Ontario to South Korea
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Highest demand for flights based on searches. 4% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Ontario to South Korea

Cheapest flights from Ontario to South Korea
Explore the most affordable flight options available from Ontario to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/126:00 amONT - ICN
2 stops47h 35mMultiple Airlines
Fri 9/196:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 7/29$904
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:21 pmONT - ICN
2 stops36h 39mAlaska Airlines
Sat 8/309:25 pmICN - ONT
2 stops32h 44mAlaska Airlines
Deal found 7/29$910
This oojo deal was found by Cheapflights users on 7/30. 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.
Tue 9/3012:10 amONT - ICN
1 stop19h 05mChina Airlines
Fri 10/3112:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 7/30$934
This oojo deal was found by Cheapflights users on 7/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:45 amONT - PUS
1 stop26h 15mChina Airlines
Sat 10/1810:20 amPUS - ONT
1 stop23h 40mChina Airlines
Deal found 7/29$952
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:00 amONT - ICN
1 stop20h 35mHawaiian Airlines
Sun 9/218:35 pmICN - ONT
1 stop30h 09mHawaiian Airlines
Deal found 7/29$1,007
This Trip.com deal was found by Cheapflights users on 7/30. 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.
Sun 10/1212:10 amONT - CJU
2 stops28h 25mMultiple Airlines
Wed 10/227:30 amCJU - ONT
2 stops26h 30mMultiple Airlines
Deal found 7/30$1,144
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/211:59 pmONT - GMP
2 stops29h 51mMultiple Airlines
Tue 9/97:55 amGMP - ONT
2 stops26h 59mMultiple Airlines
Deal found 7/29$1,372
This Korean Air deal was found by Cheapflights users on 7/30. 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.
Wed 11/56:37 amONT - PUS
2 stops19h 48mKorean Air
Wed 11/1212:00 pmPUS - ONT
2 stops22h 17mKorean Air
Deal found 7/30$1,546
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/246:00 amONT - PUS
2 stops21h 35mDelta
Mon 9/84:30 pmPUS - ONT
2 stops22h 12mDelta
Deal found 7/29$1,568
This oojo deal was found by Cheapflights users on 7/30. 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.
Thu 8/146:00 amONT - GMP
2 stops23h 50mJapan Airlines
Wed 8/2712:05 pmGMP - ONT
2 stops22h 23mJapan Airlines
Deal found 7/30$1,682
This Delta deal was found by Cheapflights users on 7/30. 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 11/56:37 amONT - TAE
2 stops20h 08mDelta
Wed 11/127:40 amTAE - ONT
2 stops26h 37mDelta
Deal found 7/30$1,758

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to South Korea 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 July 30, 2025.
Use the filters below to find and compare flights from Ontario to South Korea that are best for you.

Fly from

Ontario

Fly to

South Korea

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 1/19

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Sun 2/1

12:30 pm-4:50 pm

1 stop21h 20m

$902

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 9/12

6:00 am-9:35 pm

2 stops47h 35m

Incheon Intl

Fri 9/19

6:20 pm-11:38 pm

1 stop21h 18m

$904

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/16

2:21 pm-7:00 pm

2 stops36h 39m

Incheon Intl

Sat 8/30

9:25 pm-2:09 pm

2 stops32h 44m

$910

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Tue 9/2

12:45 am-7:00 pm

1 stop26h 15m

Busan Gimhae

Sat 10/18

10:20 am-6:00 pm

1 stop23h 40m

$952

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/14

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 9/21

8:35 pm-10:44 am

1 stop30h 09m

$1,007

OntarioJeju City

ONT - CJU

ONTCJU

Ontario

Sun 10/12

12:10 am-8:35 pm

2 stops28h 25m

Jeju City

Wed 10/22

7:30 am-6:00 pm

2 stops26h 30m

$1,144

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Tue 9/2

11:59 pm-9:50 pm

2 stops29h 51m

Seoul Gimpo Intl

Tue 9/9

7:55 am-6:54 pm

2 stops26h 59m

$1,372

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 11/5

6:37 am-7:25 pm

2 stops19h 48m

Busan Gimhae

Wed 11/12

12:00 pm-5:17 pm

2 stops22h 17m

$1,546

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 8/24

6:00 am-7:35 pm

2 stops21h 35m

Busan Gimhae

Mon 9/8

4:30 pm-10:42 pm

2 stops22h 12m

$1,568

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Thu 8/14

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Wed 8/27

12:05 pm-6:28 pm

2 stops22h 23m

$1,682

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 21 results
1
2
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Best time to book a flight from Ontario to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea from Ontario 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 Ontario to South Korea

What is the cheapest month to book a flight from Ontario to South Korea?

Currently, February is the cheapest month in which you can book a flight from Ontario to South Korea (average of $998). Flying from Ontario to South Korea in December is currently the most expensive (average of $1,635). 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 ONT to KR?

Find hourly flight availability from Ontario to South Korea. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to South Korea as you normally would.

Reviews of airlines servicing South Korea

Get insights into the airlines that provide service to South Korea. 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 South Korea. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Ontario to South Korea, such as EVA Air, Japan Airlines, and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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
1,222 reviews
EVA Air
8.4
Very good
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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
1,536 reviews
EVA Air
8.4
Very good
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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
754 reviews
EVA Air
8.4
Very good
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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
Delta
8.0
Very good
7,980 reviews
EVA Air
8.4
Very good
1,222 reviews

Crew

8.6

Entertainment

8.0

Boarding

8.4

Food

8.1

Comfort

8.3

Overall

8.4

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 Ontario to South Korea. 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 from for flights from Ontario to South Korea?

    If you book a flight to South Korea from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • What are the cheapest airlines to fly from Ontario to South Korea one-way?

    The cheapest airlines for a one-way flight from Ontario to South Korea are Alaska Airlines ($475), Hawaiian Airlines ($495), and China Airlines ($529).

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

    While some choose either Ontario - Seoul Gimpo Intl or Ontario - Busan Gimhae, Ontario - Incheon Intl is the most popular route from Ontario to South Korea.

  • Can I find deals for flights from Ontario to South Korea that include hotel bookings?

    Yes. In addition to deals on Ontario to South Korea flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to South Korea?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to South Korea.

  • Can I find deals for business class flights from Ontario to South Korea?

    Yes. Cheapflights offers flight deals from Ontario to South Korea 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 Ontario to South Korea?

    Currently, February is the cheapest month in which you can book a flight from Ontario to South Korea (average of $998). Flying from Ontario to South Korea in December is currently the most expensive (average of $1,635). 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 2 airlines flying from Ontario to South Korea

Discover the top 2 airlines that operate flights from Ontario to South Korea. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$961Average$1,089FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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