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$446+ Cheap flights from Ontario (ONT) to Seoul (SEL)

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Ontario to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Seoul (SEL). 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 September 11, 2025.

Round-trip from

$888
(Kiwi.com)

One-way from

$446
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$951
From Ontario to Seoul (SEL)
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One-way flight from Ontario to Seoul (SEL)
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Highest demand for flights based on searches. 2% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Seoul

Cheapest flights from Ontario to Seoul
Explore the most affordable flight options available from Ontario to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/201:37 pmONT - ICN
2 stops34h 08mMultiple Airlines
Mon 9/226:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 9/10$853
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/3010:40 pmONT - ICN
1 stop29h 50mMultiple Airlines
Sat 11/89:20 pmICN - ONT
2 stops43h 20mMultiple Airlines
Deal found 9/9$888
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Thu 10/212:10 amONT - ICN
2 stops24h 45mMultiple Airlines
Sat 10/117:50 amICN - ONT
2 stops26h 10mMultiple Airlines
Deal found 9/10$951
This oojo deal was found by Cheapflights users on 9/11. 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 9/3012:10 amONT - ICN
1 stop27h 25mChina Airlines
Thu 10/1612:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/11$952
This oojo deal was found by Cheapflights users on 9/10. 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 9/2112:10 amONT - ICN
1 stop27h 25mChina Airlines
Wed 10/1512:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/10$953
This oojo deal was found by Cheapflights users on 9/10. 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.
Thu 10/212:10 amONT - ICN
1 stop27h 25mChina Airlines
Sat 10/1112:35 pmICN - ONT
1 stop21h 25mChina Airlines
Deal found 9/10$954
This FlightHub deal was found by Cheapflights users on 9/11. 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 9/3012:10 amONT - ICN
1 stop19h 05mChina Airlines
Wed 10/158:35 pmICN - ONT
1 stop37h 25mChina Airlines
Deal found 9/11$957
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Mon 11/310:50 pmONT - ICN
1 stop27h 25mChina Airlines
Mon 11/1012:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 9/9$958
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/296:00 amONT - ICN
1 stop20h 35mMultiple Airlines
Sat 11/89:20 pmICN - ONT
2 stops43h 20mMultiple Airlines
Deal found 9/9$965
This oojo deal was found by Cheapflights users on 9/11. 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 9/166:00 amONT - GMP
2 stops23h 50mJapan Airlines
Tue 9/307:55 amGMP - ONT
2 stops26h 52mJapan Airlines
Deal found 9/11$1,502
This Mytrip deal was found by Cheapflights users on 9/10. 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.
Fri 9/1912:10 amONT - GMP
2 stops22h 50mMultiple Airlines
Mon 9/2211:20 amGMP - ONT
1 stop22h 40mMultiple Airlines
Deal found 9/10$1,529
This oojo deal was found by Cheapflights users on 9/9. 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 9/146:00 amONT - GMP
2 stops23h 50mJapan Airlines
Mon 9/227:55 amGMP - ONT
2 stops26h 52mJapan Airlines
Deal found 9/9$1,630

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Seoul 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 September 11, 2025.
Use the filters below to find and compare flights from Ontario to Seoul that are best for you.

Fly from

Ontario

Fly to

Seoul

Route

Depart

Return

Price

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 11/8

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sun 11/23

12:30 pm-4:50 pm

1 stop21h 20m

$996

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 11/26

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Sat 12/6

8:15 pm-4:50 pm

1 stop37h 35m

$1,220

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/20

11:07 am-7:00 pm

1 stop39h 53m

Incheon Intl

Wed 11/19

9:25 pm-5:14 pm

1 stop36h 49m

$1,257

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 10/17

7:10 am-7:00 pm

2 stops43h 50m

Incheon Intl

Sat 10/25

8:35 pm-9:58 am

2 stops29h 23m

$1,275

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 10/3

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Fri 10/31

8:35 pm-8:53 pm

1 stop16h 18m

$1,276

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 11/16

6:00 am-6:35 pm

1 stop19h 35m

Incheon Intl

Sun 11/23

8:35 pm-11:55 pm

2 stops20h 20m

$1,308

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 10/6

6:36 pm-4:20 am

1 stop17h 44m

Incheon Intl

Fri 10/10

11:30 am-12:13 pm

1 stop16h 43m

$1,324

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 10/1

6:36 pm-4:20 am

1 stop17h 44m

Incheon Intl

Tue 10/14

4:50 pm-5:40 pm

1 stop16h 50m

$1,324

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 10/4

6:51 pm-4:20 am

1 stop17h 29m

Incheon Intl

Wed 10/15

4:50 pm-10:52 pm

1 stop22h 02m

$1,324

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 10/2

6:36 pm-4:20 am

1 stop17h 44m

Incheon Intl

Fri 10/31

5:00 pm-5:34 pm

1 stop16h 34m

$1,324

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 45 results
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Best time to book a flight from Ontario to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul 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 Seoul

What is the cheapest month to book a flight from Ontario to Seoul?

Currently, February is the cheapest month in which you can book a flight from Ontario to Seoul (average of $990). Flying from Ontario to Seoul in December is currently the most expensive (average of $1,633). 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 SEL?

Find hourly flight availability from Ontario to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 24% on flights from Ontario to Seoul by exploring options for tickets at noon.

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. 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 Seoul. Reviews last updated September 11, 2025.
Get a feel of what it's like to fly with Korean Air and China Airlines from Ontario to Seoul 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
1,139 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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
767 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Boarding

8.5

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

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 Seoul. 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 Seoul?

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

  • How long is the flight from Ontario to Seoul?

    Departing from Ontario to Seoul will take you 19h 30m. The distance from Ontario to Seoul is about 6006 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Ontario to Seoul round-trip?

    According to our current data, China Airlines ($984), and Korean Air ($1,111) offers the cheapest pricing from Ontario to Seoul.

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

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

  • How can I find direct flights from Ontario to Seoul?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Seoul 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 Seoul?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Seoul (average of $990). Flying from Ontario to Seoul in December is currently the most expensive (average of $1,633). 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 Seoul

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 Seoul

Discover the top 2 airlines that operate flights from Ontario to Seoul. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$984Average$1,062FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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