$3,883 Cheap Flights from Copenhagen (CPH) to Islip (ISP)

View $3,883 flight on Sat, May 23, 2026Opens in a new window

Popular airlines from Copenhagen Airport, Kastrup (CPH) to MacArthur Airport (ISP)

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Cheap Flights from Copenhagen to Islip (CPH-ISP)

Prices were available within the past 7 days and start at $3,883 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Copenhagen (CPH) to Islip (ISP)
Origin airport
Kastrup
Destination airport
MacArthur
Distance
3812 mi

Copenhagen to Islip Flights

The cheapest times to fly from Copenhagen to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Copenhagen to Islip are during the month of . You can find some of the cheapest flights from Copenhagen to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Copenhagen to Islip

Sunday is one of the best days to book for cheap flights from Copenhagen to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Copenhagen to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Copenhagen to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $3,883 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Copenhagen to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Copenhagen to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kastrup Airport (CPH) to MacArthur Airport (ISP) cost?
Lock in a cheap one-way flight from $3,883 or cheap return flight from Kastrup Airport (CPH) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Kastrup Airport (CPH) to MacArthur Airport (ISP)?
The cheapest month to fly from CPH to ISP is , when there's less demand. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Kastrup Airport (CPH) to MacArthur Airport (ISP)?
To find the cheapest airline flying from CPH to ISP, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Kastrup Airport (CPH) to MacArthur Airport (ISP)?
Direct flights from Kastrup Airport (CPH) to MacArthur Airport (ISP) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CPH to ISP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kastrup Airport (CPH) to MacArthur Airport (ISP)?
To avoid possible delays on the Kastrup Airport (CPH) to MacArthur Airport (ISP) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Islip from Kastrup Airport (CPH)?
John F. Kennedy Intl. Airport (JFK) is the only airport in Islip with direct flights from Kastrup Airport (CPH). Check out the options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Kastrup Airport (CPH) to MacArthur Airport (ISP) last-minute?
Last-minute fares from CPH to ISP are usually more expensive. To secure the lowest prices, start looking for flights well ahead of time. That being said, if your travel plans are flexible, it's possible to score a cheap fare right before you leave.
Is it cheaper to book a CPH to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking a CPH to ISP flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one easy place will take the hassle out of travel planning. Simply secure your flights and choose from our extensive range of stays, then tailor your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Kastrup Airport (CPH) to MacArthur Airport (ISP)?
Typically, you're able to reschedule or cancel your CPH to ISP flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need further details, head to our Customer Service portal.

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*Available to One Key members.