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Cheap flights from Islip, New York to Denmark from $1,390

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Denmark departing on 9/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Denmark

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:05 am - 7:00 amISP  Islip Long Island-CPH Kastrup Copenhagen
17h 55m1 stop Boston Logan Intl
Multiple Airlines Logo
7:55 am - 4:58 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
39h 03m2 stops London Gatwick Orlando
$1,390Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
7:31 am - 7:00 amISP  Islip Long Island-CPH Kastrup Copenhagen
17h 29m1 stop Boston Logan Intl
Multiple Airlines Logo
3:20 pm - 4:58 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
55h 38m2 stops London Gatwick Orlando
$1,417Multiple Airlines
Thu, Sep 17 - Thu, Sep 24
Multiple Airlines Logo
7:05 am - 8:55 amISP  Islip Long Island-CPH Kastrup Copenhagen
19h 50m3 stops Boston Logan Intl Montreal Pierre Elliott Trudeau Intl Zurich
Multiple Airlines Logo
12:45 pm - 10:56 amCPH  Kastrup Copenhagen-ISP Islip Long Island
28h 11m2 stops Toronto Pearson Intl Boston Logan Intl
$1,543Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
7:05 am - 7:00 amISP  Islip Long Island-CPH Kastrup Copenhagen
17h 55m1 stop Boston Logan Intl
Multiple Airlines Logo
1:25 pm - 8:59 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
13h 34m1 stop Boston Logan Intl
$1,557Multiple Airlines
Sun, Sep 20 - Sun, Sep 27
Multiple Airlines Logo
2:16 pm - 9:45 pmISP  Islip Long Island-CPH Kastrup Copenhagen
25h 29m2 stops Boston Logan Intl Reykjavik Keflavik Intl
Multiple Airlines Logo
6:05 am - 8:15 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
20h 10m2 stops Lisbon Humberto Delgado Boston Logan Intl
$1,566Multiple Airlines
Thu, Sep 17 - Thu, Sep 24
Multiple Airlines Logo
7:31 am - 7:00 amISP  Islip Long Island-CPH Kastrup Copenhagen
17h 29m1 stop Boston Logan Intl
Multiple Airlines Logo
1:25 pm - 8:15 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
12h 50m1 stop Boston Logan Intl
$1,579Multiple Airlines
Thu, Sep 17 - Thu, Sep 24
Multiple Airlines Logo
5:34 pm - 3:55 pmISP  Islip Long Island-CPH Kastrup Copenhagen
16h 21m2 stops Boston Logan Intl London Heathrow
Multiple Airlines Logo
7:00 am - 6:35 pmCPH  Kastrup Copenhagen-ISP Islip Long Island
17h 35m2 stops London Heathrow Boston Logan Intl
$1,807Multiple Airlines
Sun, Sep 20 - Sun, Sep 27

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momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Denmark 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, momondo users made 832,500 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from Islip, New York to Denmark that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Sun 9/20

7:05 am-7:00 am

1 stop17h 55m

Kastrup Copenhagen

Sun 9/27

7:55 am-4:58 pm

2 stops39h 03m

$1,390

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Thu 9/17

7:31 am-7:00 am

1 stop17h 29m

Kastrup Copenhagen

Thu 9/24

3:20 pm-4:58 pm

2 stops55h 38m

$1,417

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Sun 9/20

7:05 am-8:55 am

3 stops19h 50m

Kastrup Copenhagen

Sun 9/27

12:45 pm-10:56 am

2 stops28h 11m

$1,543

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Sun 9/20

7:05 am-7:00 am

1 stop17h 55m

Kastrup Copenhagen

Sun 9/27

1:25 pm-8:59 pm

1 stop13h 34m

$1,557

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Thu 9/17

2:16 pm-9:45 pm

2 stops25h 29m

Kastrup Copenhagen

Thu 9/24

6:05 am-8:15 pm

2 stops20h 10m

$1,566
Quickest round-trip

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Thu 9/17

7:31 am-7:00 am

1 stop17h 29m

Kastrup Copenhagen

Thu 9/24

1:25 pm-8:15 pm

1 stop12h 50m

$1,579

IslipCopenhagen

ISP Islip Long Island - CPH Kastrup Copenhagen

ISPCPH

Islip Long Island

Sun 9/20

5:34 pm-3:55 pm

2 stops16h 21m

Kastrup Copenhagen

Sun 9/27

7:00 am-6:35 pm

2 stops17h 35m

$1,807

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Denmark from

How to get the cheapest flight ticket from Islip, New York to Denmark

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What airlines fly to Denmark?

Scandinavian Airlines, Icelandair and Delta are the top three most popular airlines that fly to Denmark from Islip, New York according to our data. Scandinavian Airlines is the first choice among our users, with 76% of people opting to fly with this airline when traveling to Denmark. Keep in mind that there are 12 different airlines that fly to Denmark on a routine basis, so you have a few additional options to choose from.

Cheap Islip, New York to Denmark flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Denmark

Fastest flight time

17h 55m

Direct flights

None
The fastest flight from Islip, New York to Denmark takes 17h 55m
There are no direct flights from Islip, New York to Denmark. There are no popular flight routes from Islip, New York to Denmark.
Search flight deals

Frequently asked questions about flying from Islip, New York to Denmark

  • When did momondo last update prices for flights from Islip Long Island Airport to Denmark?

    Prices for flights from Islip Long Island Airport to Denmark refresh daily.

  • How old do you have to be to fly from Islip Long Island Airport to Denmark?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Denmark.

  • What documentation or ID do you need to fly to Denmark?

    The travel and health documents required for your trip to Denmark can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Denmark. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Denmark?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Islip to Denmark for you.

Can I find flights from Islip to Denmark with flexible booking policies on momondo?

Flights from Islip to Denmark with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Islip to Denmark?

Once you have performed a search for Islip to Denmark flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Islip to Denmark right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Denmark, momondo offers a useful price alert feature which will track prices for flights to Denmark from Islip and alert you when they change.

An easier way to manage your Denmark trip

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Sun 9/6
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