HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
South Korea

$423+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to South Korea with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$977
(Trip.com)

One-way from

$423
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$959
Provider with most accurate pricing for Los Angeles-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Seoul (SEL) flights.
Search Deals
From Ontario to South Korea
Search Deals
One-way flight from Ontario to South Korea
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($242 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 March 25, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2112:10 amONT - ICN
1 stop19h 05mChina Airlines
Tue 10/2812:25 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 3/24$972
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/108:24 amONT - ICN
1 stop20h 06mMultiple Airlines
Sun 5/256:20 pmICN - ONT
1 stop21h 16mMultiple Airlines
Deal found 3/25$977
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2712:10 amONT - PUS
1 stop26h 50mChina Airlines
Tue 5/612:15 pmPUS - ONT
1 stop21h 45mChina Airlines
Deal found 3/24$1,002
This ScholarTrip 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/265:40 amONT - ICN
1 stop18h 15mKorean Air
Wed 4/24:40 pmICN - ONT
1 stop16h 02mKorean Air
Deal found 3/24$1,336
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/912:10 amONT - GMP
2 stops26h 20mMultiple Airlines
Mon 4/218:20 amGMP - ONT
2 stops25h 40mMultiple Airlines
Deal found 3/24$1,419
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/411:10 pmONT - PUS
1 stop28h 45mMultiple Airlines
Thu 6/192:00 pmPUS - ONT
2 stops25h 39mMultiple Airlines
Deal found 3/24$1,674
This KAYAK deal was found by Cheapflights users on 3/23. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/165:45 amONT - TAE
2 stops22h 50mKorean Air
Sun 4/277:35 amTAE - ONT
2 stops25h 09mKorean Air
Deal found 3/23$1,841
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amONT - PUS
2 stops21h 35mDelta
Thu 6/198:00 amPUS - ONT
2 stops25h 05mDelta
Deal found 3/24$2,022

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 March 25, 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

Sat 5/10

8:24 am-8:30 pm

1 stop20h 06m

Incheon Intl

Sun 5/25

6:20 pm-11:36 pm

1 stop21h 16m

$977

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 4/8

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Wed 6/4

8:35 pm-6:00 pm

1 stop37h 25m

$979

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 4/27

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Tue 5/6

12:15 pm-6:00 pm

1 stop21h 45m

$1,002

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/15

7:00 am-4:40 pm

1 stop17h 40m

Incheon Intl

Mon 9/22

4:40 pm-5:22 pm

1 stop16h 42m

$1,360

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 4/10

5:40 am-4:30 pm

1 stop18h 50m

Incheon Intl

Wed 4/16

7:20 pm-10:43 pm

1 stop19h 23m

$1,375

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/23

11:59 pm-3:30 pm

1 stop23h 31m

Incheon Intl

Wed 4/30

5:25 pm-10:10 pm

1 stop20h 45m

$1,418

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Wed 4/9

12:10 am-6:30 pm

2 stops26h 20m

Seoul Gimpo Intl

Mon 4/21

8:20 am-6:00 pm

2 stops25h 40m

$1,419

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/23

7:05 am-3:00 pm

1 stop15h 55m

Incheon Intl

Thu 5/15

4:50 pm-2:25 pm

1 stop13h 35m

$1,475

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 5/27

11:46 am-6:45 pm

2 stops38h 59m

Incheon Intl

Thu 6/12

8:45 pm-5:05 pm

2 stops36h 20m

$1,491

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 9/1

11:39 am-5:05 pm

2 stops37h 26m

Incheon Intl

Sun 9/7

1:20 am-11:59 pm

2 stops38h 39m

$1,534

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 32 results
1
2
3
4

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 $1,002). Flying from Ontario to South Korea in June is currently the most expensive (average of $1,664). 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 March 25, 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 March 25, 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines and China 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.
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,047 reviews
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
China Airlines
8.2
Very good
723 reviews
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,890 reviews
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Hawaiian Airlines
7.9
Good
2,330 reviews
Korean Air
8.4
Very good
1,047 reviews

Entertainment

8.2

Overall

8.4

Crew

8.7

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 ($574), WestJet ($579), and Philippine Airlines ($725).

  • 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 $1,002). Flying from Ontario to South Korea in June is currently the most expensive (average of $1,664). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to South Korea

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Haneda flights
Los Angeles to Narita flights
San Francisco to Haneda flights
San Francisco to Narita flights
Los Angeles to Manila flights
Los Angeles to Suvarnabhumi flights
San Francisco to Manila flights
Los Angeles to Incheon Intl flights
San Francisco to New Delhi flights
Los Angeles to Taiwan Taoyuan Intl flights
Ontario to Narita flights
San Francisco to Suvarnabhumi flights
Los Angeles to Ho Chi Minh City flights
San Diego to Narita flights
Ontario to Haneda flights
San Francisco to Hong Kong flights
Los Angeles to Hongqiao Intl flights
San Francisco to Hongqiao Intl flights
Los Angeles to Kansai Intl flights
San Francisco to Ho Chi Minh City flights
Los Angeles to Pu Dong flights
San Francisco to Pu Dong flights
San Francisco to Taiwan Taoyuan Intl flights
San Francisco to Incheon Intl flights
San Francisco to Mumbai flights
Ontario to Manila flights
Los Angeles to Hong Kong flights
Los Angeles to Gimpo Intl flights
Los Angeles to Denpasar flights
San Diego to Haneda flights
San Francisco to Capital flights
San Francisco to Bangalore flights
San Francisco to Kansai Intl flights
Los Angeles to Singapore flights
Los Angeles to Sung Shan flights
Los Angeles to New Delhi flights
Santa Ana to Manila flights
San Francisco to Singapore flights
San Francisco to Hyderabad flights
San Jose to New Delhi flights
Ontario to Suvarnabhumi flights
Los Angeles to Itami flights
Burbank to Manila flights
San Francisco to Denpasar flights
San Francisco to Chennai flights
San Francisco to Gimpo Intl flights
San Jose to Manila flights
Las Vegas to Narita flights
Oakland to Narita flights
Santa Ana to Narita flights

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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$961Average$1,076FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,199FlexibilityNo cancel feeOn-time81%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.