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$448+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Jan 4 — Jan 111
Sun 1/4
Sun 1/11
1 adult, Economy
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Cheap 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 December 5, 2025.

This oojo deal was found by Cheapflights users on 12/4. 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 12/3010:50 pmONT - ICN
1 stop27h 25mChina Airlines
Sun 1/188:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 12/4$1,320
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 12/246:00 amONT - ICN
2 stops46h 35mMultiple Airlines
Mon 12/296:55 pmICN - ONT
1 stop22h 17mMultiple Airlines
Deal found 12/4$1,356
This Air Canada deal was found by Cheapflights users on 12/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:05 amONT - ICN
2 stops41h 55mAir Canada
Mon 1/196:55 pmICN - ONT
2 stops43h 03mAir Canada
Deal found 12/4$1,364
This oojo deal was found by Cheapflights users on 12/4. 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.
Mon 12/2910:50 pmONT - ICN
1 stop19h 30mChina Airlines
Tue 1/138:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 12/4$1,380
This oojo deal was found by Cheapflights users on 12/4. 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 12/710:50 pmONT - ICN
1 stop27h 25mChina Airlines
Sat 12/2712:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 12/4$1,385
This China Airlines deal was found by Cheapflights users on 12/4. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:50 pmONT - ICN
1 stop19h 30mChina Airlines
Mon 1/198:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 12/4$1,394
This oojo deal was found by Cheapflights users on 12/3. 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.
Wed 12/310:50 pmONT - ICN
1 stop27h 25mChina Airlines
Wed 1/1412:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 12/3$1,464
This Alaska Airlines deal was found by Cheapflights users on 12/4. 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.
Fri 12/512:13 pmONT - ICN
1 stop37h 22mAlaska Airlines
Thu 12/188:35 pmICN - ONT
1 stop20h 39mAlaska Airlines
Deal found 12/4$1,467
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 12/246:00 amONT - ICN
2 stops46h 35mMultiple Airlines
Wed 12/3110:50 pmICN - ONT
1 stop16h 18mMultiple Airlines
Deal found 12/4$1,474
This Alaska Airlines deal was found by Cheapflights users on 12/4. 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.
Fri 12/56:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Fri 12/128:35 pmICN - ONT
1 stop19h 54mAlaska Airlines
Deal found 12/4$1,476
This Alaska Airlines deal was found by Cheapflights users on 12/3. 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.
Fri 12/56:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Sun 12/78:35 pmICN - ONT
1 stop31h 44mAlaska Airlines
Deal found 12/3$1,485
This Delta deal was found by Cheapflights users on 12/5. 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 12/2111:42 amONT - TAE
2 stops39h 03mDelta
Thu 12/257:40 amTAE - ONT
2 stops44h 22mDelta
Deal found 12/5$2,170

Find 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 December 5, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$862
(FlightHub)

One-way from

$448
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,271
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. 13% potential increase in price ($153 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 5, 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

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Tue 4/7

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Thu 4/30

8:00 pm-6:00 pm

1 stop38h 00m

$889

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Mon 2/23

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Thu 4/23

8:00 pm-6:00 pm

1 stop38h 00m

$927

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 3/15

11:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Thu 4/30

12:15 pm-6:00 pm

1 stop21h 45m

$948

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 4/11

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Fri 6/5

8:00 pm-6:00 pm

1 stop38h 00m

$948

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 4/5

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Wed 5/13

8:00 pm-6:00 pm

1 stop38h 00m

$948

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 4/5

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Sun 5/17

12:15 pm-6:00 pm

1 stop21h 45m

$948

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sun 4/5

12:10 am-7:00 pm

1 stop26h 50m

Busan Gimhae

Wed 6/17

8:00 pm-6:00 pm

1 stop38h 00m

$948

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Wed 1/14

10:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Wed 1/28

11:50 am-4:50 pm

1 stop22h 00m

$962

OntarioBusan

ONT - PUS

ONTPUS

Ontario

Sat 3/21

11:50 pm-6:50 pm

1 stop27h 00m

Busan Gimhae

Wed 4/8

12:15 pm-6:00 pm

1 stop21h 45m

$1,010

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Tue 2/17

6:14 am-10:55 am

2 stops35h 41m

Seoul Gimpo Intl

Wed 2/25

7:40 pm-3:08 pm

2 stops36h 28m

$1,020

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 60 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 $360). Flying from Ontario to South Korea in June is currently the most expensive (average of $534). 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 December 5, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to South Korea at noon. If you’re flexible enough to do this you can expect to save up to 91% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Ontario to South Korea?

Use this chart to determine the cheapest time to fly round-trip from Ontario to South Korea. Price data was last updated on December 1, 2024.

Travelers seeking maximum savings on their Ontario to South Korea flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 5, 2025.
Read through reviews of airlines operating flights from Ontario to South Korea, such as Korean Air and China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,180 reviews

Entertainment

8.2

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

Overall

8.4

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
1,180 reviews
Korean Air
8.4
Very good
1,180 reviews

Entertainment

8.2

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

Overall

8.4

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
788 reviews
Korean Air
8.4
Very good
1,180 reviews

Entertainment

8.2

Food

8.1

Crew

8.7

Comfort

8.3

Boarding

8.5

Overall

8.4

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.

  • How long is the flight from Ontario to South Korea?

    China Airlines, Japan Airlines, and Korean Air can get you from Ontario to South Korea in just under 19h 15m. Your travel time can differ by up to 16h 26m. There are 5984 mi between Ontario and South Korea. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 Frontier ($71), American Airlines ($97), and United Airlines ($138).

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

    While some choose either Ontario - Busan Gimhae or Ontario - Seoul Gimpo Intl, 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 $360). Flying from Ontario to South Korea in June is currently the most expensive (average of $534). 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 December 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$892Average$1,022FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,246FlexibilityNo cancel feeOn-time81%

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