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Incheon Intl

$434+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ICN
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$854
(Kiwi.com)

One-way from

$434
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,526
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. 7% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 18, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/15. 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.
Tue 8/268:35 amONT - ICN
1 stop18h 25mAlaska Airlines
Fri 9/59:25 pmICN - ONT
2 stops29h 19mAlaska Airlines
Deal found 8/15$791
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Sun 9/2110:13 pmONT - ICN
1 stop30h 17mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$854
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Thu 9/259:46 pmONT - ICN
1 stop30h 44mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$855
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Tue 9/2310:09 amONT - ICN
2 stops34h 26mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$864
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Wed 9/246:00 amONT - ICN
2 stops23h 10mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$875
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Mon 9/226:00 amONT - ICN
2 stops42h 30mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$878
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Sat 9/208:59 pmONT - ICN
2 stops31h 31mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$887
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/2610:40 pmONT - ICN
2 stops25h 05mMultiple Airlines
Mon 9/296:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 8/16$896
This oojo deal was found by Cheapflights users on 8/16. 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 10/1212:10 amONT - ICN
1 stop27h 25mChina Airlines
Thu 10/2312:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 8/16$945
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:10 amONT - ICN
1 stop19h 05mChina Airlines
Tue 10/1412:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 8/17$946

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 August 18, 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

Sat 10/11

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Sat 10/18

8:35 pm-6:00 pm

1 stop37h 25m

$948

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 10/14

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Wed 10/29

12:30 pm-5:50 pm

1 stop21h 20m

$948

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/7

12:45 am-7:35 pm

1 stop26h 50m

Incheon Intl

Tue 10/7

8:35 pm-6:00 pm

1 stop37h 25m

$948

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 11/10

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Mon 11/24

12:30 pm-4:50 pm

1 stop21h 20m

$974

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 11/3

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Fri 11/7

12:30 pm-4:50 pm

1 stop21h 20m

$974

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 9/24

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Sun 10/12

8:35 pm-6:00 pm

1 stop37h 25m

$980

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 10/15

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Wed 11/12

8:15 pm-4:50 pm

1 stop37h 35m

$984

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/13

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Thu 11/6

12:30 pm-4:50 pm

1 stop21h 20m

$984

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 11/5

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Thu 11/13

8:15 pm-4:50 pm

1 stop37h 35m

$984

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 10/14

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Fri 11/14

12:30 pm-4:50 pm

1 stop21h 20m

$984

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 19 results
1
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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, February is the cheapest month in which you can book a flight from Ontario to Incheon Intl Airport (average of $992). Flying from Ontario to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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 August 18, 2025.

It’s typically best to fly out from Ontario to Incheon Intl Airport at noon. Doing so could potentially save you 17% 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 August 18, 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
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

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
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

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
764 reviews
Korean Air
8.4
Very good
1,131 reviews

Entertainment

8.2

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

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 27h 25m. China Airlines provides one of the quickest options available for as low as $948. Airlines will cover a distance of 6006 mi.

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

    According to our current data, China Airlines ($961), and Korean Air ($1,111) offers the cheapest pricing from Ontario to Incheon Intl Airport. These flights start at 25% 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, February is the cheapest month in which you can book a flight from Ontario to Incheon Intl Airport (average of $992). Flying from Ontario to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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
Daejeon

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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$961Average$1,102FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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