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$400+ 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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEL
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
1 adult, Economy
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Find cheap flights from Ontario to Seoul with Cheapflights

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Cheap 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 February 22, 2026.

This SmartFares deal was found by Cheapflights users on 2/18. 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.
Fri 5/812:10 am
ONT
-
ICN
1 stop19h 20m
China Airlines
Tue 5/1912:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 2/18$812
This oojo deal was found by Cheapflights users on 2/20. 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 4/1312:10 am
ONT
-
ICN
1 stop19h 20m
China Airlines
Tue 4/288:05 pm
ICN
-
ONT
1 stop37h 55m
China Airlines
Deal found 2/20$815
This iWofly deal was found by Cheapflights users on 2/20. 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.
Mon 4/1312:10 am
ONT
-
ICN
1 stop19h 20m
China Airlines
Thu 4/238:05 pm
ICN
-
ONT
1 stop37h 55m
China Airlines
Deal found 2/20$837
This iWofly deal was found by Cheapflights users on 2/19. 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.
Tue 4/2112:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Sun 5/318:05 pm
ICN
-
ONT
1 stop37h 55m
China Airlines
Deal found 2/19$841
This BusinessClass deal was found by Cheapflights users on 2/20. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1812:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Wed 5/2712:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 2/20$844
This oojo deal was found by Cheapflights users on 2/20. 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 10/1912:10 am
ONT
-
ICN
1 stop27h 25m
China Airlines
Wed 11/412:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 2/20$854
This oojo deal was found by Cheapflights users on 2/19. 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 3/1511:50 pm
ONT
-
ICN
1 stop19h 30m
China Airlines
Thu 3/2612:30 pm
ICN
-
ONT
1 stop21h 20m
China Airlines
Deal found 2/19$855
This oojo deal was found by Cheapflights users on 2/21. 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 4/3012:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Sun 5/108:05 pm
ICN
-
ONT
1 stop37h 55m
China Airlines
Deal found 2/21$856
This China Airlines deal was found by Cheapflights users on 2/20. 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.
Fri 5/812:10 am
ONT
-
ICN
1 stop19h 20m
China Airlines
Wed 5/2712:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 2/20$866
This Booking.com deal was found by Cheapflights users on 2/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:45 am
ONT
-
ICN
1 stop18h 45m
China Airlines
Wed 8/2612:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 2/18$871
This iWofly deal was found by Cheapflights users on 2/19. 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.
Wed 4/1512:10 am
ONT
-
ICN
1 stop26h 55m
China Airlines
Sat 5/3012:45 pm
ICN
-
ONT
1 stop21h 15m
China Airlines
Deal found 2/19$884
This SmartFares deal was found by Cheapflights users on 2/19. 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.
Sun 8/2312:45 am
ONT
-
ICN
1 stop26h 20m
China Airlines
Thu 9/1012:45 pm
ICN
-
ONT
1 stop21h 55m
China Airlines
Deal found 2/19$888

Find 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 February 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$812
(SmartFares)

One-way from

$400
(flugladen.de)

Popular in

December

Cheapest in

April

Average price

$926
Provider with most accurate pricing for Ontario-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Seoul (SEL) flights.
Search Deals
From Ontario to Seoul (SEL)
Search Deals
One-way flight from Ontario to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($26 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 February 2026
Search Deals

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 February 22, 2026.
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

Sun 4/5

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Thu 5/7

12:45 pm-6:00 pm

1 stop21h 15m

$866

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 5/17

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Wed 6/17

8:05 pm-6:00 pm

1 stop37h 55m

$866

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 5/17

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 6/16

12:45 pm-6:00 pm

1 stop21h 15m

$909

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 3/17

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Wed 3/25

12:30 pm-5:50 pm

1 stop21h 20m

$945

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 5/15

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Tue 6/9

12:45 pm-6:00 pm

1 stop21h 15m

$951

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 5/17

12:10 am-11:30 am

1 stop19h 20m

Incheon Intl

Sat 6/20

12:45 pm-6:00 pm

1 stop21h 15m

$951

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 5/18

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Tue 6/16

12:45 pm-6:00 pm

1 stop21h 15m

$951

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 5/17

12:10 am-7:05 pm

1 stop26h 55m

Incheon Intl

Sun 6/21

12:45 pm-6:00 pm

1 stop21h 15m

$989

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 3/17

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Tue 3/24

12:30 pm-5:50 pm

1 stop21h 20m

$995

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/15

11:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Thu 3/19

12:30 pm-5:50 pm

1 stop21h 20m

$995

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 40 results
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Compare providers for flights from Ontario to Seoul

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 Seoul in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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-Seoul flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Seoul flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Seoul 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-Seoul 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 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 $333). Flying from Ontario to Seoul in June is currently the most expensive (average of $515). 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.

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 February 22, 2026.
Get a feel of what it's like to fly with 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.
China Airlines
8.3
Very good
807 reviews

Boarding

8.3

Entertainment

8.0

Comfort

8.0

Crew

8.5

Overall

8.3

Food

7.8

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.
China Airlines
8.3
Very good
807 reviews
China Airlines
8.3
Very good
807 reviews

Boarding

8.3

Entertainment

8.0

Comfort

8.0

Crew

8.5

Overall

8.3

Food

7.8

Reviews

1 / 20
10.0
Excellent

A,Feb 2026

SEA - TPE

China Airlines has improved significantly over the years. This is the first time we fly on their business class after 20+ years. Both hardware and services impressed us. Will definitely fly with again in the future.

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. 1 airline 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 26h 55m. The distance from Ontario to Seoul is about 6006 mi.

  • What is the cheapest airline to fly from Ontario to Seoul round-trip?

    According to our current data, China Airlines ($860), 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 $333). Flying from Ontario to Seoul in June is currently the most expensive (average of $515). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ontario to Seoul

Discover the top airline 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 February 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$860Average$998FlexibilityNo cancel feeOn-time70%

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