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$340+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SEL
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$927
(Kiwi.com)

One-way from

$340
(Hawaiian Airlines)

Popular in

December

Cheapest in

August

Average price

$1,954
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. 17% potential increase in price ($287 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($109 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
dom. 9/149:41 pmONT - ICN
1 stop30h 49mMultiple Airlines
mié. 9/2410:10 pmICN - ONT
1 stop39h 00mMultiple Airlines
Deal found 6/12$927
This flugladen.de deal was found by Cheapflights users on 6/11. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/3112:45 amONT - ICN
1 stop18h 30mChina Airlines
mar. 9/98:35 pmICN - ONT
1 stop38h 05mChina Airlines
Deal found 6/11$928
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/286:00 amONT - ICN
1 stop20h 35mAlaska Airlines
lun. 10/138:35 pmICN - ONT
1 stop19h 24mAlaska Airlines
Deal found 6/10$1,100
This American Airlines deal was found by Cheapflights users on 6/12. 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.
jue. 10/211:59 pmONT - ICN
1 stop23h 31mAmerican Airlines
mar. 10/145:25 pmICN - ONT
1 stop20h 35mAmerican Airlines
Deal found 6/12$1,150
This oojo deal was found by Cheapflights users on 6/10. 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.
sáb. 9/2710:56 pmONT - ICN
2 stops43h 49mEtihad Airways
vie. 10/101:35 amICN - ONT
2 stops35h 54mEtihad Airways
Deal found 6/10$1,249
This American Airlines deal was found by Cheapflights users on 6/12. 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.
dom. 9/1411:59 pmONT - GMP
2 stops29h 51mMultiple Airlines
mié. 9/247:55 amGMP - ONT
2 stops26h 59mMultiple Airlines
Deal found 6/12$1,430
This oojo deal was found by Cheapflights users on 6/12. 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.
lun. 7/76:00 amONT - GMP
2 stops36h 45mJapan Airlines
mié. 7/167:20 pmGMP - ONT
2 stops38h 44mJapan Airlines
Deal found 6/12$1,569

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 junio 12, 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

dom. 9/14

9:41 pm-8:30 pm

1 stop30h 49m

Incheon Intl

mié. 9/24

10:10 pm-9:10 pm

1 stop39h 00m

$927

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 8/31

12:45 am-11:15 am

1 stop18h 30m

Incheon Intl

mar. 9/9

8:35 pm-6:40 pm

1 stop38h 05m

$928

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 9/28

6:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

lun. 10/13

8:35 pm-11:59 pm

1 stop19h 24m

$1,100

OntarioIncheon

ONT - ICN

ONTICN

Ontario

jue. 10/2

11:59 pm-3:30 pm

1 stop23h 31m

Incheon Intl

mar. 10/14

5:25 pm-10:00 pm

1 stop20h 35m

$1,150

OntarioIncheon

ONT - ICN

ONTICN

Ontario

sáb. 9/27

10:56 pm-10:45 am

2 stops43h 49m

Incheon Intl

vie. 10/10

1:35 am-9:29 pm

2 stops35h 54m

$1,249

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

dom. 9/14

11:59 pm-9:50 pm

2 stops29h 51m

Seoul Gimpo Intl

mié. 9/24

7:55 am-6:54 pm

2 stops26h 59m

$1,430

OntarioSeoul

ONT - GMP

ONTGMP

Ontario

lun. 7/7

6:00 am-10:45 am

2 stops36h 45m

Seoul Gimpo Intl

mié. 7/16

7:20 pm-6:04 pm

2 stops38h 44m

$1,569

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 8/24

8:35 am-7:00 pm

1 stop18h 25m

$340

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 9/7

12:45 am-9:00 pm

2 stops28h 15m

$530

OntarioIncheon

ONT - ICN

ONTICN

Ontario

dom. 8/10

12:45 am-7:35 pm

1 stop26h 50m

$551

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 22 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 $1,000). 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 junio 12, 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.

Rainfall in Seoul by month

Plan your trip to Seoul by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.

Temperature in Seoul by month

Plan your trip to Seoul by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seoul, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 junio 12, 2025.
Peruse reviews from past customers who have flown with EVA Air, Korean Air and Japan Airlines from Ontario to Seoul to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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
1,490 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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
738 reviews
EVA Air
8.4
Very good
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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
1,202 reviews

Entertainment

8.0

Overall

8.4

Boarding

8.4

Food

8.1

Crew

8.6

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 ($928), Alaska Airlines ($1,100), and American Airlines ($1,150) offers the cheapest pricing from Ontario to Seoul. China Airlines is 31% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 Hawaiian Airlines ($340), China Airlines ($551), and Alaska Airlines ($595).

  • 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 $1,000). 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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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
China AirlinesCheapest$984Average$1,119FlexibilityNo cancel feeOn-time70%
Korean AirCheapest$1,111Average$1,246FlexibilityNo cancel feeOn-time81%

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