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$407+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEL
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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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 November 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/97:00 amONT - ICN
2 stops36h 50mMultiple Airlines
Sun 12/146:55 pmICN - ONT
1 stop21h 36mMultiple Airlines
Deal found 11/5$742
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Sun 11/96:00 amONT - ICN
1 stop19h 35mAlaska Airlines
Fri 11/148:35 pmICN - ONT
1 stop19h 57mAlaska Airlines
Deal found 11/5$916
This oojo deal was found by Cheapflights users on 11/3. 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 11/2310:50 pmONT - ICN
1 stop27h 25mChina Airlines
Wed 12/108:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 11/3$930
This oojo deal was found by Cheapflights users on 11/4. 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
Wed 12/38:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 11/4$949
This American Airlines deal was found by Cheapflights users on 11/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:47 pmONT - ICN
2 stops30h 58mAmerican Airlines
Wed 12/107:15 pmICN - ONT
2 stops30h 38mAmerican Airlines
Deal found 11/5$971
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 11/1710:50 pmONT - ICN
1 stop31h 40mMultiple Airlines
Thu 11/279:20 pmICN - ONT
2 stops40h 46mMultiple Airlines
Deal found 11/5$996
This oojo deal was found by Cheapflights users on 11/5. 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 11/2310:50 pmONT - ICN
1 stop19h 30mChina Airlines
Wed 12/38:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 11/5$1,009
This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:00 amONT - ICN
1 stop17h 15mUnited Airlines
Fri 11/2812:45 pmICN - ONT
1 stop16h 52mUnited Airlines
Deal found 11/5$1,016
This China Airlines deal was found by Cheapflights users on 11/4. 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.
Sat 11/2910:50 pmONT - ICN
1 stop19h 30mChina Airlines
Thu 12/118:15 pmICN - ONT
1 stop37h 35mChina Airlines
Deal found 11/4$1,020
This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/76:00 amONT - ICN
1 stop17h 15mUnited Airlines
Sat 11/2212:45 pmICN - ONT
2 stops24h 59mUnited Airlines
Deal found 11/5$1,021
This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:41 pmONT - ICN
1 stop28h 34mUnited Airlines
Fri 12/1212:45 pmICN - ONT
1 stop21h 52mUnited Airlines
Deal found 11/5$1,022
This oojo deal was found by Cheapflights users on 11/6. 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 11/136:00 amONT - GMP
2 stops23h 05mJapan Airlines
Wed 11/1912:05 pmGMP - ONT
2 stops20h 12mJapan Airlines
Deal found 11/6$2,664

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$742
(Kiwi.com)

One-way from

$407
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$821
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. 1% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 6, 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

Fri 4/3

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Thu 4/23

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 4/7

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Sat 4/18

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/8

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Mon 4/20

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 4/5

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Sat 4/18

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Wed 4/8

12:10 am-11:15 am

1 stop19h 05m

Incheon Intl

Fri 4/24

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 3/1

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 3/12

12:30 pm-5:50 pm

1 stop21h 20m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 4/3

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Mon 4/20

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 3/3

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Thu 3/12

12:30 pm-5:50 pm

1 stop21h 20m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 5/5

12:10 am-7:35 pm

1 stop27h 25m

Incheon Intl

Wed 5/20

12:35 pm-6:00 pm

1 stop21h 25m

$965

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 3/3

10:50 pm-11:20 am

1 stop19h 30m

Incheon Intl

Mon 3/16

12:30 pm-5:50 pm

1 stop21h 20m

$965

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 41 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 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-Seoul flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Seoul flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, October is the cheapest month in which you can book a flight from Ontario to Seoul (average of $360). Flying from Ontario to Seoul 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 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 November 6, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 28% 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 November 6, 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
1,160 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Boarding

8.5

Entertainment

8.2

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
1,160 reviews
Korean Air
8.4
Very good
1,160 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Boarding

8.5

Entertainment

8.2

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
778 reviews
Korean Air
8.4
Very good
1,160 reviews

Crew

8.7

Comfort

8.3

Food

8.1

Overall

8.4

Boarding

8.5

Entertainment

8.2

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 23h 50m. The distance from Ontario to Seoul is about 5986 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 ($896), and Korean Air ($1,111) offers the cheapest pricing from Ontario to Seoul.

  • What are the cheapest airlines to fly from Ontario to Seoul one-way?

    The cheapest airlines for a one-way flight from Ontario to Seoul are Alaska Airlines ($459), United Airlines ($518), and Japan Airlines ($872).

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

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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$896Average$1,062FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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