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$1,049+ Cheap flights from Islip, NY (ISP) to Copenhagen (CPH)

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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — CPH
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
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Cheap flight deals from Islip to Copenhagen

Cheapest flights from Islip to Copenhagen
Explore the most affordable flight options available from Islip to Copenhagen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 14, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/289:59 am
ISP
-
CPH
1 stop16h 01m
Multiple Airlines
Sat 4/41:25 pm
CPH
-
ISP
1 stop11h 19m
Multiple Airlines
Deal found 2/11$1,049
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 3/309:59 am
ISP
-
CPH
1 stop15h 01m
Multiple Airlines
Mon 4/61:25 pm
CPH
-
ISP
1 stop11h 19m
Multiple Airlines
Deal found 2/13$1,057
This KAYAK deal was found by Cheapflights users on 2/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:19 pm
ISP
-
CPH
2 stops14h 31m
Multiple Airlines
Sat 11/2112:30 pm
CPH
-
ISP
2 stops28h 28m
Multiple Airlines
Deal found 2/12$1,248
This BusinessClass deal was found by Cheapflights users on 2/12. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/812:30 pm
ISP
-
CPH
2 stops14h 00m
Multiple Airlines
Wed 7/158:40 pm
CPH
-
ISP
2 stops25h 30m
Multiple Airlines
Deal found 2/12$1,597

Find flight deals from Islip to Copenhagen

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Copenhagen (CPH). 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 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,049
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$569
Provider with most accurate pricing for Islip Long Island-Kastrup Copenhagen flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Kastrup Copenhagen flights.
Search Deals
From Islip Long Island to Kastrup Copenhagen
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 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 Islip to Copenhagen 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 14, 2026.
Use the filters below to find and compare flights from Islip to Copenhagen that are best for you.

Fly from

Islip

Fly to

Copenhagen

Route

Depart

Return

Price

IslipCopenhagen

ISP - CPH

ISPCPH

Islip Long Island

Sat 3/28

9:59 am-7:00 am

1 stop16h 01m

Kastrup Copenhagen

Sat 4/4

1:25 pm-6:44 pm

1 stop11h 19m

$1,049

IslipCopenhagen

ISP - CPH

ISPCPH

Islip Long Island

Mon 3/30

9:59 am-7:00 am

1 stop15h 01m

Kastrup Copenhagen

Mon 4/6

1:25 pm-6:44 pm

1 stop11h 19m

$1,057

IslipCopenhagen

ISP - CPH

ISPCPH

Islip Long Island

Wed 7/8

12:30 pm-8:30 am

2 stops14h 00m

Kastrup Copenhagen

Wed 7/15

8:40 pm-4:10 pm

2 stops25h 30m

$1,597

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

  • Most accurate provider: When it comes to deals on Islip, New York-Copenhagen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Copenhagen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Copenhagen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Copenhagen 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 Islip, New York-Copenhagen 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 Islip to Copenhagen

Have a flexible travel schedule? Discover the best time to fly to Copenhagen 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 Copenhagen

What is the cheapest month to book a flight from Islip, New York to Copenhagen?

Currently, March is the cheapest month in which you can book a flight from Islip, New York to Copenhagen (average of $295). Flying from Islip, New York to Copenhagen in June is currently the most expensive (average of $524). 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

Find useful and relevant information for your journey from Islip to Copenhagen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

  • How can I find direct flights from Islip to Copenhagen?

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

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

    Yes. Cheapflights offers flight deals from Islip to Copenhagen 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, New York to Copenhagen?

    Currently, March is the cheapest month in which you can book a flight from Islip, New York to Copenhagen (average of $295). Flying from Islip, New York to Copenhagen in June is currently the most expensive (average of $524). 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

Traveling to a place near Copenhagen?

Book flights to Copenhagen if you plan to visit one of these locations
Kastrup

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