The cheapest times to fly from ISP to BLL are

  • March 5th to March 25th
  • April 23rd to July 8th (except the week of May 21st)
  • October 22nd to January 21st (except the weeks of November 12th, November 19th, December 17th, and January 1st)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ISP to BLL is early December. Prices can be as high as $5593 for Sunday flights during early April, or as low as $799 for Tuesday flights around early December.


When to Fly to Billund

Flying from Islip, NY (ISP) to Billund (BLL) will usually cost between $799 to $5593 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early December with an average ticket price of $876. Due to high demand the most expensive time to fly is early April, with an average price of $3615. Planning your trip to low-cost times can easily save you $2739 on economy flights and even more on first-class flights. Generally, any price below $990 can be considered a good price for a round-trip ISP to BLL flight.

See below for a graph of average weekly prices for the ISP to BLL route. All prices are for round-trip tickets in USD.

ISP to BLL Flight Prices

Compared to other flights, the ISP to BLL flight is priced close to the average and costs about as much as the average flight leaving from Islip. The average price per mile (for a direct flight) is $0.17, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $1974 (60%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $879. Return trip prices are from the BLL to ISP flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ISP to BLL can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 7 hour 37 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from ISP to BLL while comparing.

Destination alternative #1: Kastrup Airport (CPH) in Copenhagen

  • 137 miles (220 km) away from BLL
  • Usually 6.36% less expensive than BLL
  • 2-layover flights available

See ISP to CPH flights

Destination alternative #2: Hamburg Airport (HAM) in Hamburg

  • 149 miles (240 km) away from BLL
  • Usually 6.11% less expensive than BLL
  • 2-layover flights available

See ISP to HAM flights


Flight Hacking ISP to BLL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ISP to BLL — but Champion Traveler does!

Hack #1: London (ISP > LHR > BLL)

  • Price for both tickets: $649
  • Average savings: $342 (34.49%)

See ISP to LHR flights

Hack #2: Paris (ISP > CDG > BLL)

  • Price for both tickets: $715
  • Average savings: $276 (27.83%)

See ISP to CDG flights

Hack #3: Boston, MA (ISP > BOS > BLL)

  • Price for both tickets: $744
  • Average savings: $246 (24.85%)

See ISP to BOS flights


Flight Questions Answered

Still have questions about flying from ISP to BLL? We’ve got answers.

Which airlines fly this route?

You can find 10 major airlines flying this route most often: American, atlasglobal, British Airways, Finnair, Iberia, KLM, Lufthansa, SAS, Singapore Airlines, United, and potentially more during busy seasons.

How far away is it from Billund Airport to Long Island MacArthur Airport?

The distance between the two airports is roughly 3683 miles or 5927 kilometers.

How long does it take to fly from ISP to BLL?

The real-world flight time for a nonstop ISP to BLL flight is about 7 hour 37 minutes.

How many flights go between Islip, NY and Billund?

It depends on the day of the week and the date, but a typical day might have around 7 available flights from ISP to BLL.


Airport Location Info


Departing Airport

Origination code ISP
Origination airport name Long Island MacArthur Airport
City Islip, NY
Country the United States
Latitude 40.8
Longitude -73.1

Return Airport

Destination code BLL
Destination airport name Billund Airport
City Billund
Country Denmark
Latitude 55.7
Longitude 9.2


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.