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$340+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$927
(Kiwi.com)

One-way from

$340
(Hawaiian Airlines)

Popular in

December

Cheapest in

February

Average price

$1,322
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. 3% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 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 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 junio 12, 2025.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/149:41 pmONT - ICN
1 stop30h 49mMultiple Airlines
mié. 9/2410:10 pmICN - ONT
1 stop39h 00mMultiple Airlines
Deal found 6/12$927
This flugladen.de deal was found by Cheapflights users on 6/11. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/3112:45 amONT - ICN
1 stop18h 30mChina Airlines
mar. 9/98:35 pmICN - ONT
1 stop38h 05mChina Airlines
Deal found 6/11$928
This oojo deal was found by Cheapflights users on 6/11. 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.
mié. 10/1512:10 amONT - PUS
1 stop26h 50mChina Airlines
jue. 10/2312:15 pmPUS - ONT
1 stop21h 45mChina Airlines
Deal found 6/11$955
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/286:00 amONT - ICN
1 stop20h 35mAlaska Airlines
lun. 10/138:35 pmICN - ONT
1 stop19h 24mAlaska Airlines
Deal found 6/10$1,100
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/211:59 pmONT - ICN
1 stop23h 31mAmerican Airlines
mar. 10/145:25 pmICN - ONT
1 stop20h 35mAmerican Airlines
Deal found 6/12$1,150
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/2710:56 pmONT - ICN
2 stops43h 49mEtihad Airways
vie. 10/101:35 amICN - ONT
2 stops35h 54mEtihad Airways
Deal found 6/10$1,249
This Orbitz deal was found by Cheapflights users on 6/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/112:10 amONT - PUS
1 stop19h 05mMultiple Airlines
dom. 10/128:00 pmPUS - ONT
2 stops19h 59mMultiple Airlines
Deal found 6/11$1,292
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/1411:59 pmONT - GMP
2 stops29h 51mMultiple Airlines
mié. 9/247:55 amGMP - ONT
2 stops26h 59mMultiple Airlines
Deal found 6/12$1,430
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 7/76:00 amONT - GMP
2 stops36h 45mJapan Airlines
mié. 7/167:20 pmGMP - ONT
2 stops38h 44mJapan Airlines
Deal found 6/12$1,569
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/136:00 amONT - PUS
2 stops24h 10mJapan Airlines
vie. 6/209:20 amPUS - ONT
2 stops24h 44mJapan Airlines
Deal found 6/12$5,495

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 junio 12, 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

dom. 9/14

9:41 pm-8:30 pm

1 stop30h 49m

Incheon Intl

mié. 9/24

10:10 pm-9:10 pm

1 stop39h 00m

$927

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 8/31

12:45 am-11:15 am

1 stop18h 30m

Incheon Intl

mar. 9/9

8:35 pm-6:40 pm

1 stop38h 05m

$928

OntarioBusan

ONT - PUS

ONTPUS

Ontario

mié. 10/15

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

jue. 10/23

12:15 pm-6:00 pm

1 stop21h 45m

$955

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 9/28

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

lun. 10/13

8:35 pm-11:59 pm

1 stop19h 24m

$1,100

OntarioIncheon

ONT - ICN

ONTICN

Ontario

jue. 10/2

11:59 pm-3:30 pm

1 stop23h 31m

Incheon Intl

mar. 10/14

5:25 pm-10:00 pm

1 stop20h 35m

$1,150

OntarioIncheon

ONT - ICN

ONTICN

Ontario

sáb. 9/27

10:56 pm-10:45 am

2 stops43h 49m

Incheon Intl

vie. 10/10

1:35 am-9:29 pm

2 stops35h 54m

$1,249

OntarioBusan

ONT - PUS

ONTPUS

Ontario

mié. 10/1

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

dom. 10/12

8:00 pm-11:59 pm

2 stops19h 59m

$1,292

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

dom. 9/14

11:59 pm-9:50 pm

2 stops29h 51m

Seoul Gimpo Intl

mié. 9/24

7:55 am-6:54 pm

2 stops26h 59m

$1,430

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

lun. 7/7

6:00 am-10:45 am

2 stops36h 45m

Seoul Gimpo Intl

mié. 7/16

7:20 pm-6:04 pm

2 stops38h 44m

$1,569

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 8/24

8:35 am-7:00 pm

1 stop18h 25m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 30 results
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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 $1,000). 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 junio 12, 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.

Rainfall in South Korea by month

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

In terms of precipitation, rainfall in South Korea ranges from 0.8 - 10.2 inches per month. July is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit South Korea when rainfall is around 0.8 in.

Temperature in South Korea by month

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

If weather is an important factor for your trip to South Korea, 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 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 28.4 F).

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 junio 12, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air and Japan Airlines from Ontario to South Korea by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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
1,490 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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

Food

8.1

Entertainment

8.0

Boarding

8.4

Overall

8.4

Comfort

8.3

Crew

8.6

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 Hawaiian Airlines ($340), China Airlines ($551), and Alaska Airlines ($595).

  • 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 $1,000). 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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Alternative routes for Ontario to South Korea

See prices for flight routes from nearby airports that may be better suited for you.
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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$984Average$1,098FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,246FlexibilityNo cancel feeOn-time81%

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