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$440+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
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 enero 27, 2026.

This oojo deal was found by Cheapflights users on 1/26. 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. 5/1112:10 am
ONT
-
ICN
1 stop19h 20m
China Airlines
mar. 6/912:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 1/26$856
This iWofly deal was found by Cheapflights users on 1/26. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/2412:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
dom. 6/1412:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 1/26$870
This Trip.com deal was found by Cheapflights users on 1/26. 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.
mar. 3/1011:50 pm
ONT
-
ICN
1 stop27h 25m
China Airlines
mié. 3/1812:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 1/26$879
This Trip.com deal was found by Cheapflights users on 1/25. 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.
mar. 4/1412:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
mié. 5/1312:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 1/25$880
This SmartFares deal was found by Cheapflights users on 1/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/911:50 pm
ONT
-
ICN
1 stop27h 25m
China Airlines
jue. 3/1212:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 1/26$887
This SmartFares deal was found by Cheapflights users on 1/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/911:50 pm
ONT
-
ICN
1 stop27h 25m
China Airlines
jue. 3/1912:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 1/26$888
This FlightHub deal was found by Cheapflights users on 1/26. 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.
lun. 4/1312:10 am
ONT
-
PUS
1 stop17h 20m
China Airlines
mié. 4/2210:30 am
PUS
-
ONT
1 stop23h 30m
China Airlines
Deal found 1/26$893
This Gotogate deal was found by Cheapflights users on 1/26. 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.
dom. 4/1212:10 am
ONT
-
PUS
1 stop19h 05m
China Airlines
mar. 6/210:30 am
PUS
-
ONT
1 stop23h 30m
China Airlines
Deal found 1/26$896
This oojo deal was found by Cheapflights users on 1/26. 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. 4/1012:10 am
ONT
-
PUS
1 stop19h 05m
China Airlines
mar. 6/210:30 am
PUS
-
ONT
1 stop23h 30m
China Airlines
Deal found 1/26$897
This Gotogate deal was found by Cheapflights users on 1/26. 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.
mar. 9/112:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
lun. 9/712:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 1/26$898
This oojo deal was found by Cheapflights users on 1/27. 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.
jue. 4/3012:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
dom. 5/108:05 pm
ICN
-
ONT
1 stop37h 55m
China Airlines
Deal found 1/27$900
This oojo deal was found by Cheapflights users on 1/27. 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. 3/210:50 pm
ONT
-
ICN
1 stop27h 25m
China Airlines
sáb. 3/1412:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 1/27$901

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 enero 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$856
(oojo)

One-way from

$440
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$921
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. 2% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 enero 27, 2026.
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

lun. 4/13

12:10 am-9:30 am

1 stop17h 20m

Busan Gimhae

mié. 4/22

10:30 am-6:00 pm

1 stop23h 30m

$893

OntarioBusan

ONT - PUS

ONTPUS

Ontario

dom. 4/12

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

mar. 6/2

10:30 am-6:00 pm

1 stop23h 30m

$896

OntarioBusan

ONT - PUS

ONTPUS

Ontario

vie. 4/10

12:10 am-11:15 am

1 stop19h 05m

Busan Gimhae

mar. 6/2

10:30 am-6:00 pm

1 stop23h 30m

$897

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 4/5

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

jue. 4/23

8:05 pm-6:00 pm

1 stop37h 55m

$945

OntarioIncheon

ONT - ICN

ONTICN

Ontario

mié. 3/11

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

mié. 3/18

12:30 pm-5:50 pm

1 stop21h 20m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

sáb. 3/14

11:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

mié. 3/25

12:30 pm-5:50 pm

1 stop21h 20m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

sáb. 3/7

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

sáb. 3/14

12:30 pm-5:50 pm

1 stop21h 20m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

mar. 4/14

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

vie. 4/24

12:45 pm-6:00 pm

1 stop21h 15m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

mié. 4/22

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

dom. 5/10

8:05 pm-6:00 pm

1 stop37h 55m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

sáb. 3/7

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

mié. 3/18

12:30 pm-5:50 pm

1 stop21h 20m

$995

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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 $351). Flying from Ontario to South Korea in June is currently the most expensive (average of $528). 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 enero 27, 2026.

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 78% on your trip compared to booking a flight in the evening.

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 March 30, 2025.

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 enero 27, 2026.
Read through reviews of airlines operating flights from Ontario to South Korea, such as China Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
802 reviews

Overall

8.3

Comfort

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.
China Airlines
8.3
Very good
802 reviews
China Airlines
8.3
Very good
802 reviews

Overall

8.3

Comfort

8.0

Crew

8.5

Food

7.8

Boarding

8.3

Entertainment

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

TPE - SFO

China Airlines has horrible customer services. The flight I was taking had many empty seats, but I got rejected many services with the excuses that the flight is fully booked. 1. When I was checking in at the front dest to request the seat together with my husband, I was told that the flight was fully booked. We need to pay almost extra $200 per person to sit together. 2. When I tried to use the VIP lounge with my mileage points, I was rejected. The reason was that the flight was fully booked.

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 can get you from Ontario to South Korea in just under 17h 20m. Your travel time can differ by up to . There are 6004 mi between Ontario and South Korea.

  • 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 ($76), American Airlines ($81), 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 $351). Flying from Ontario to South Korea in June is currently the most expensive (average of $528). 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 airline flying from Ontario to South Korea

Discover the top airline 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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$860Average$1,000FlexibilityNo cancel feeOn-time70%

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