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.

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).

How far in advance should I book a flight from Islip to Seoul?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 18% on flights from Islip to Seoul compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $978. For sooner than that we have options available in the next 3 days from $1,070.

What is the cheapest month to fly from Islip to Seoul?

February can be a great time to fly to Seoul from Islip with a flight ticket averaging about $1,270. Cheapflights users have found deals in the month of February for as cheap as $617. The most expensive prices can be found in the month of June.

What is the cheapest time of day to fly from ISP to SEL?

When flying from Islip to Seoul, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Islip to Seoul?

Islip Long Island (ISP) is the airport you will fly out of if you book a flight from Islip to Seoul. You should not have trouble finding flights to Seoul from Long Island; the airport handles an average of 0 outbound flights to Seoul per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Islip airport to Seoul. It is only a 7.2 mi journey to Long Island (ISP) from Islip’s city center.

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

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

How can I find direct flights from Islip to Seoul?

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

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

Yes. Cheapflights offers flight deals from Islip 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.

$2,223+ Cheap Flights from Islip to Seoul

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Cheap flight deals from Islip to Seoul

Round-trip from	$2,223 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$1,485

From Islip Long Island to Seoul (SEL)

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($122 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2025

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Find flight deals from Islip to Seoul

Cheapest flights from Islip to Seoul
Explore the most affordable flight options available from Islip to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

Sat 10/1112:00 pmISP - ICN

2 stops44h 35mMultiple Airlines

Sat 10/189:30 amICN - ISP

1 stop16h 54mMultiple Airlines

Deal found 8/27

$2,223

Sun 10/124:33 pmISP - ICN

1 stop35h 52mMultiple Airlines

Sun 10/1912:45 pmICN - ISP

2 stops34h 52mMultiple Airlines

Deal found 8/27

$2,304

Best flights from Islip to Seoul
Discover carefully curated flight deals from Islip to Seoul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 28, 2025.

Sat 10/1112:00 pmISP - ICN

2 stops44h 35mMultiple Airlines

Sat 10/189:30 amICN - ISP

1 stop16h 54mMultiple Airlines

Deal found 8/27

$2,223

Sun 10/124:33 pmISP - ICN

1 stop35h 52mMultiple Airlines

Sun 10/1912:45 pmICN - ISP

2 stops34h 52mMultiple Airlines

Deal found 8/27

$2,304

Fly from

Fly to

Route

Depart

Return

Price

IslipIncheon

ISP - ICN

ISPICN

Islip Long Island

Sat 10/11

12:00 pm-9:35 pm

2 stops44h 35m

Incheon Intl

Sat 10/18

9:30 am-1:24 pm

1 stop16h 54m

$2,223

IslipIncheon

ISP - ICN

ISPICN

Islip Long Island

Sun 10/12

4:33 pm-5:25 pm

1 stop35h 52m

Incheon Intl

Sun 10/19

12:45 pm-10:37 am

2 stops34h 52m

$2,304

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/27

Best time to book a flight from Islip to Seoul

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

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

Currently, February is the cheapest month in which you can book a flight from Islip to Seoul (average of $990). Flying from Islip 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.

Related info for your journey

What airport do you fly from for flights from Islip to Seoul?
Islip Long Island (ISP) is the airport you will fly out of if you book a flight from Islip to Seoul. You should not have trouble finding flights to Seoul from Long Island; the airport handles an average of 0 outbound flights to Seoul per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Islip airport to Seoul. It is only a 7.2 mi journey to Long Island (ISP) from Islip’s city center.
Can I find deals for flights from Islip to Seoul that include hotel bookings?
Yes. In addition to deals on Islip to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Seoul?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Seoul.
Can I find deals for business class flights from Islip to Seoul?
Yes. Cheapflights offers flight deals from Islip 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 Islip to Seoul?
Currently, February is the cheapest month in which you can book a flight from Islip to Seoul (average of $990). Flying from Islip 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.

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$2,223+ Cheap flights from Islip (ISP) to Seoul (SEL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Seoul with Cheapflights

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2. Select your favorite providers

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Cheap flight deals from Islip to Seoul

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Find flight deals from Islip to Seoul

Cheapest flights from Islip to SeoulExplore the most affordable flight options available from Islip to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

Explore the most affordable flight options available from Islip to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Seoul that are best for you.

Best time to book a flight from Islip to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from Islip with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Islip to Seoul

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

Related info for your journey

Find useful and relevant information for your journey from Islip 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 Islip to Seoul?

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

How can I find direct flights from Islip to Seoul?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Cheapest flights from Islip to Seoul
Explore the most affordable flight options available from Islip to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 28, 2025.