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$461+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEL
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$858
(Kiwi.com)

One-way from

$475
(Alaska Airlines)

Popular in

December

Cheapest in

February

Average price

$1,164
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. 4% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/126:00 amONT - ICN
2 stops47h 35mMultiple Airlines
Fri 9/196:20 pmICN - ONT
1 stop21h 18mMultiple Airlines
Deal found 7/29$904
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Sat 8/162:21 pmONT - ICN
2 stops36h 39mAlaska Airlines
Sat 8/309:25 pmICN - ONT
2 stops32h 44mAlaska Airlines
Deal found 7/29$910
This oojo deal was found by Cheapflights users on 7/30. 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 stop19h 05mChina Airlines
Fri 10/3112:30 pmICN - ONT
1 stop21h 20mChina Airlines
Deal found 7/30$934
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:00 amONT - ICN
1 stop20h 35mHawaiian Airlines
Sun 9/218:35 pmICN - ONT
1 stop30h 09mHawaiian Airlines
Deal found 7/29$1,007
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 9/211:59 pmONT - GMP
2 stops29h 51mMultiple Airlines
Tue 9/97:55 amGMP - ONT
2 stops26h 59mMultiple Airlines
Deal found 7/29$1,372
This oojo deal was found by Cheapflights users on 7/30. 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 8/146:00 amONT - GMP
2 stops23h 50mJapan Airlines
Wed 8/2712:05 pmGMP - ONT
2 stops22h 23mJapan Airlines
Deal found 7/30$1,682

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 July 30, 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

Mon 1/19

10:50 pm-7:15 pm

1 stop27h 25m

Incheon Intl

Sun 2/1

12:30 pm-4:50 pm

1 stop21h 20m

$902

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Fri 9/12

6:00 am-9:35 pm

2 stops47h 35m

Incheon Intl

Fri 9/19

6:20 pm-11:38 pm

1 stop21h 18m

$904

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sat 8/16

2:21 pm-7:00 pm

2 stops36h 39m

Incheon Intl

Sat 8/30

9:25 pm-2:09 pm

2 stops32h 44m

$910

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Sun 9/14

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 9/21

8:35 pm-10:44 am

1 stop30h 09m

$1,007

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Tue 9/2

11:59 pm-9:50 pm

2 stops29h 51m

Seoul Gimpo Intl

Tue 9/9

7:55 am-6:54 pm

2 stops26h 59m

$1,372

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

Thu 8/14

6:00 am-9:50 pm

2 stops23h 50m

Seoul Gimpo Intl

Wed 8/27

12:05 pm-6:28 pm

2 stops22h 23m

$1,682

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Tue 8/19

9:00 am-7:00 pm

1 stop18h 00m

$461

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Thu 8/28

7:22 pm-7:00 pm

2 stops31h 38m

$475

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 8/18

7:22 pm-8:30 pm

2 stops57h 08m

$488

OntarioIncheon

ONT - ICN

ONTICN

Ontario

Mon 1/19

10:50 pm-7:15 pm

1 stop27h 25m

$529

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 14 results
1
2

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 $998). Flying from Ontario to Seoul 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 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 July 30, 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 July 30, 2025.
Get a feel of what it's like to fly with EVA Air, Japan Airlines, 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.
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,222 reviews
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Japan Airlines
8.3
Very good
1,536 reviews
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
754 reviews
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Hawaiian Airlines
7.8
Good
2,611 reviews
EVA Air
8.4
Very good
1,222 reviews

Entertainment

8.0

Food

8.1

Overall

8.4

Crew

8.6

Boarding

8.4

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

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

    According to our current data, China Airlines ($902), Alaska Airlines ($910), and Japan Airlines ($1,682) 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 ($475), Hawaiian Airlines ($495), and China Airlines ($529).

  • 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 $998). Flying from Ontario to Seoul 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

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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$961Average$1,102FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,257FlexibilityNo cancel feeOn-time81%

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