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Incheon Intl

$444+ Cheap flights from Ontario (ONT) to Incheon Intl (ICN)

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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheap flight deals from Ontario to Incheon Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Incheon Intl (ICN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$929
(oojo)

One-way from

$444
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,379
Provider with most accurate pricing for Ontario-Incheon Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Incheon Intl flights.
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From Ontario to Incheon Intl
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One-way flight from Ontario to Incheon Intl
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Highest demand for flights based on searches. 8% potential increase in price ($122 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Ontario to Incheon Intl

Cheapest flights from Ontario to Incheon Intl
Explore the most affordable flight options available from Ontario to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 10/206:05 amONT - ICN
2 stops41h 40mMultiple Airlines
Mon 11/106:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$830
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 10/206:05 amONT - ICN
2 stops41h 40mMultiple Airlines
Fri 11/146:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$863
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Thu 10/2310:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Tue 11/119:20 pmICN - ONT
2 stops40h 22mMultiple Airlines
Deal found 10/13$897
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Thu 10/2310:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Mon 11/106:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$900
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 10/228:00 amONT - ICN
2 stops45h 35mMultiple Airlines
Mon 11/106:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$908
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 10/245:15 pmONT - ICN
2 stops30h 30mMultiple Airlines
Mon 11/106:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$916
This oojo deal was found by Cheapflights users on 10/14. 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 11/2410:50 pmONT - ICN
1 stop27h 25mChina Airlines
Mon 12/88:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 10/14$929
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 10/206:05 amONT - ICN
2 stops41h 40mMultiple Airlines
Sun 11/96:55 pmICN - ONT
1 stop21h 45mMultiple Airlines
Deal found 10/13$931
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Thu 10/2310:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Fri 11/146:55 pmICN - ONT
1 stop21h 55mMultiple Airlines
Deal found 10/13$933
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Thu 10/2310:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Sat 11/159:20 pmICN - ONT
2 stops26h 57mMultiple Airlines
Deal found 10/13$943

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Incheon Intl 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 October 16, 2025.
Use the filters below to find and compare flights from Ontario to Incheon Intl Airport that are best for you.

Fly from

Ontario

Fly to

Incheon Intl

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/9

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Tue 11/25

12:30 pm-4:50 pm

1 stop21h 20m

$989

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 1/18

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Fri 1/23

8:35 pm-11:56 pm

1 stop20h 21m

$999

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 11/24

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Mon 12/1

8:15 pm-4:50 pm

1 stop37h 35m

$1,014

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 1/18

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 1/22

12:30 pm-4:50 pm

1 stop21h 20m

$1,055

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 2/21

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Wed 2/25

8:15 pm-4:50 pm

1 stop37h 35m

$1,055

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 4/10

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Fri 4/17

12:35 pm-6:00 pm

1 stop21h 25m

$1,055

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 4/10

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Sat 4/18

12:35 pm-6:00 pm

1 stop21h 25m

$1,055

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/8

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Fri 4/17

12:35 pm-6:00 pm

1 stop21h 25m

$1,070

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/8

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Sat 4/18

12:35 pm-6:00 pm

1 stop21h 25m

$1,070

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 1/19

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 1/22

12:30 pm-4:50 pm

1 stop21h 20m

$1,070

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 23 results
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Compare providers for flights from Ontario to Incheon Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Incheon Intl in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Incheon Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Incheon Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Incheon Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Incheon Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Incheon Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Incheon Intl

Have a flexible travel schedule? Discover the best time to fly to Incheon Intl 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 Incheon Intl Airport

What is the cheapest month to book a flight from Ontario to Incheon Intl Airport?

Currently, October is the cheapest month in which you can book a flight from Ontario to Incheon Intl Airport (average of $360). Flying from Ontario to Incheon Intl Airport 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 ICN?

Find hourly flight availability from Ontario to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 16, 2025.

It’s typically best to fly out from Ontario to Incheon Intl Airport in the afternoon. Doing so could potentially save you 38% on the flight price compared to flying in the morning, which is usually more expensive.

Reviews of airlines servicing Incheon Intl

Get insights into the airlines that provide service to Incheon Intl. 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 Incheon Intl. Reviews last updated October 16, 2025.
Get a feel of what it's like to fly with Korean Air and China Airlines from Ontario to Incheon Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,149 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

Food

8.1

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
1,149 reviews
Korean Air
8.4
Very good
1,149 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

Food

8.1

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
8.3
Very good
768 reviews
Korean Air
8.4
Very good
1,149 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

Food

8.1

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 Incheon Intl. 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 Incheon Intl?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Incheon Intl. 2 airlines have flights from Ontario to Incheon Intl on a regular basis. Booking flights from Ontario to Incheon Intl should not be difficult; the airport handles an average of 0 outbound flights to Incheon Intl per day.

  • How long is the flight from Ontario to Incheon Intl Airport?

    A quick flight from Ontario to Incheon Intl Airport can take about 19h 35m. China Airlines provides one of the quickest options available for as low as $999. Airlines will cover a distance of 6006 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Incheon Intl Airport round-trip?

    According to our current data, China Airlines ($896), and Korean Air ($1,111) offers the cheapest pricing from Ontario to Incheon Intl Airport. These flights start at 32% lower than the current average price 3 months from now.

  • Can I find deals for flights from Ontario to Incheon Intl that include hotel bookings?

    Yes. In addition to deals on Ontario to Incheon Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Incheon Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Incheon Intl.

  • Can I find deals for business class flights from Ontario to Incheon Intl?

    Yes. Cheapflights offers flight deals from Ontario to Incheon Intl 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 Incheon Intl Airport?

    Currently, October is the cheapest month in which you can book a flight from Ontario to Incheon Intl Airport (average of $360). Flying from Ontario to Incheon Intl Airport 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

Traveling to a place near Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
Suwon
Seongnam

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Alternative routes for Ontario to Incheon Intl

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 Incheon Intl

Discover the top 2 airlines that operate flights from Ontario to Incheon Intl. 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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$896Average$1,062FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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