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$402+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$704
(Kiwi.com)

One-way from

$402
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$885
Provider with most accurate pricing for Los Angeles-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Seoul (SEL) flights.
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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. 18% potential increase in price ($251 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 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 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 April 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/28:24 amONT - ICN
1 stop20h 06mMultiple Airlines
Sat 5/246:20 pmICN - ONT
1 stop21h 16mMultiple Airlines
Deal found 4/16$822
This Gotogate deal was found by Cheapflights users on 4/16. 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.
Wed 8/2712:45 amONT - ICN
1 stop18h 30mChina Airlines
Sun 8/318:35 pmICN - ONT
1 stop38h 05mChina Airlines
Deal found 4/16$885
This oojo deal was found by Cheapflights users on 4/16. 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.
Sun 8/3112:45 amONT - PUS
1 stop18h 30mChina Airlines
Mon 9/158:00 pmPUS - ONT
1 stop38h 00mChina Airlines
Deal found 4/16$886
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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.
Sun 8/248:35 amONT - ICN
1 stop18h 25mAlaska Airlines
Wed 9/109:25 pmICN - ONT
2 stops29h 20mAlaska Airlines
Deal found 4/16$1,110
This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2612:10 amONT - CJU
1 stop25h 20mMultiple Airlines
Tue 5/610:30 amCJU - ONT
1 stop23h 30mMultiple Airlines
Deal found 4/17$1,214
This Mytrip deal was found by Cheapflights users on 4/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/512:10 amONT - PUS
1 stop19h 05mMultiple Airlines
Tue 10/149:35 pmPUS - ONT
2 stops35h 30mMultiple Airlines
Deal found 4/16$1,232
This oojo deal was found by Cheapflights users on 4/16. 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.
Sun 9/2811:00 pmONT - ICN
2 stops55h 05mEtihad Airways
Wed 10/151:35 amICN - ONT
2 stops36h 06mEtihad Airways
Deal found 4/16$1,315
This WestJet deal was found by Cheapflights users on 4/17. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:00 amONT - ICN
2 stops44h 45mWestJet
Thu 5/298:45 pmICN - ONT
2 stops41h 50mWestJet
Deal found 4/17$1,327
This Justfly.com deal was found by Cheapflights users on 4/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:00 amONT - ICN
1 stop17h 40mKorean Air
Tue 10/144:40 pmICN - ONT
1 stop16h 37mKorean Air
Deal found 4/17$1,341
This Delta deal was found by Cheapflights users on 4/16. 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.
Mon 4/285:45 amONT - ICN
1 stop18h 45mDelta
Mon 5/127:20 pmICN - ONT
1 stop15h 00mDelta
Deal found 4/16$1,357
This Hawaiian Airlines deal was found by Cheapflights users on 4/17. 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.
Wed 10/156:00 amONT - ICN
1 stop20h 35mHawaiian Airlines
Wed 11/199:25 pmICN - ONT
1 stop17h 30mHawaiian Airlines
Deal found 4/17$1,370
This Delta deal was found by Cheapflights users on 4/16. 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.
Mon 10/66:00 amONT - PUS
2 stops20h 20mDelta
Tue 10/147:00 amPUS - ONT
2 stops26h 17mDelta
Deal found 4/16$1,483

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 April 17, 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

Fri 5/2

8:24 am-8:30 pm

1 stop20h 06m

Incheon Intl

Sat 5/24

6:20 pm-11:36 pm

1 stop21h 16m

$822

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 8/27

12:45 am-11:15 am

1 stop18h 30m

Incheon Intl

Sun 8/31

8:35 pm-6:40 pm

1 stop38h 05m

$885

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 8/31

12:45 am-11:15 am

1 stop18h 30m

Busan Gimhae

Mon 9/15

8:00 pm-6:00 pm

1 stop38h 00m

$886

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 8/24

8:35 am-7:00 pm

1 stop18h 25m

Incheon Intl

Wed 9/10

9:25 pm-10:45 am

2 stops29h 20m

$1,110

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 10/5

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

Tue 10/14

9:35 pm-5:05 pm

2 stops35h 30m

$1,232

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/28

11:00 pm-10:05 pm

2 stops55h 05m

Incheon Intl

Wed 10/15

1:35 am-9:41 pm

2 stops36h 06m

$1,315

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 5/8

6:00 am-6:45 pm

2 stops44h 45m

Incheon Intl

Thu 5/29

8:45 pm-10:35 pm

2 stops41h 50m

$1,327

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 10/2

7:00 am-4:40 pm

1 stop17h 40m

Incheon Intl

Tue 10/14

4:40 pm-5:17 pm

1 stop16h 37m

$1,341

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 4/28

5:45 am-4:30 pm

1 stop18h 45m

Incheon Intl

Mon 5/12

7:20 pm-6:20 pm

1 stop15h 00m

$1,357

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 9/24

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Mon 10/13

8:35 pm-10:37 pm

1 stop18h 02m

$1,370

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 29 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 $1,001). Flying from Ontario to South Korea in June is currently the most expensive (average of $1,650). 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 April 17, 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 April 17, 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
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,177 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,064 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
China Airlines
8.2
Very good
729 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Alaska Airlines
8.0
Very good
9,882 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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 China Airlines ($522), WestJet ($564), 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 $1,001). Flying from Ontario to South Korea in June is currently the most expensive (average of $1,650). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$961Average$1,073FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,230FlexibilityNo cancel feeOn-time81%

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