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Islip to Fort Lauderdale flights in December 2026 from $278 ISP → FLL

Long Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)

For departures in December 2026, the cheapest return found recently is $638 with jetBlue, 2 Dec – 8 Dec, found 2 days ago. The cheapest one-way found recently is $278 with jetBlue, 13 Dec, found 2 days ago.

Return

In December 2026, the cheapest return fare on each of 8 departure dates is usually $612 to $1,154. Across all 22 departure dates we hold on this route, it is usually $544 to $893. Of the 3 months with enough return fares to compare, December 2026 is usually the most expensive.

Cheapest return found recently

$638

2 Dec – 8 Dec · jetBlue

Long Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)

out nonstop, back nonstop

found 2 days ago

See prices for these datesCheck today's price

Cheapest we hold, of any age

$500

10 Dec – 13 Dec · jetBlue

Long Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)

out nonstop, back 1 stop

found 4 days ago

See prices for these datesCheck today's price

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
10 Dec – 13 Dec$500jetBlueout nonstop, back 1 stopfound 4 days agoSee prices for these dates
3 Dec – 11 Dec$533jetBlueout nonstop, back 1 stopfound 6 days agoSee prices for these dates
2 Dec – 8 Dec$638jetBlueout nonstop, back nonstopfound 2 days agoSee prices for these dates
21 Dec – 11 Jan 2027$866jetBlueout nonstop, back 1 stopfound 4 days agoSee prices for these dates
22 Dec – 28 Dec$896jetBlueout nonstop, back 1 stopfound 2 days agoSee prices for these dates

Every date we hold

8 departure dates

2 Dec – 8 Dec: $638, found 2 days ago3 Dec – 11 Dec: $533, found 6 days ago10 Dec – 13 Dec: $500, found 4 days ago21 Dec – 11 Jan 2027: $866, found 4 days ago22 Dec – 28 Dec: $896, found 2 days ago23 Dec – 28 Dec: $1,142, found 2 days ago25 Dec – 31 Dec: $1,190, found 7 days ago28 Dec – 3 Jan 2027: $1,244, found 4 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Dec – 8 Dec$638jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back nonstopfound 2 days agoSee prices for these dates
3 Dec – 11 Dec$533jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 6 days agoSee prices for these dates
10 Dec – 13 Dec$500jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 4 days agoSee prices for these dates
21 Dec – 11 Jan 2027$866jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 4 days agoSee prices for these dates
22 Dec – 28 Dec$896jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 2 days agoSee prices for these dates
23 Dec – 28 Dec$1,142jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 2 days agoSee prices for these dates
25 Dec – 31 Dec$1,190jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 7 days agoSee prices for these dates
28 Dec – 3 Jan 2027$1,244jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)out nonstop, back 1 stopfound 4 days agoSee prices for these dates

Which month looks cheapest?

November 2026 is the cheapest month — from $366.

November 2026From $366Cheapest seen9 departure dates24 Nov – 27 Nov · found 3 days agoSee prices for these datesEvery date in November 2026
December 2026From $5008 departure dates10 Dec – 13 Dec · found 4 days agoSee prices for these dates
January 2027From $4824 departure dates2 Jan 2027 – 9 Jan 2027 · found 8 days agoSee prices for these dates
February 2027From $5651 departure date1 Feb 2027 – 11 Feb 2027 · found 8 days agoSee prices for these dates

One-way

In December 2026, the cheapest one-way fare on each of 7 departure dates is usually $319 to $391. Across all 12 departure dates we hold on this route, it is usually $319 to $504. Of the 2 months with enough one-way fares to compare, December 2026 is usually the cheapest.

Cheapest one-way found recently

$278

13 Dec · jetBlue

Long Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)

nonstop

found 2 days ago

Open this tripCheck today's price

It is also the cheapest one-way we hold, of any age.

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The cheapest dates in December 2026

DatesFromAirlineStopsFound
13 Dec$278jetBluenonstopfound 2 days agoOpen this trip
5 Dec$319jetBluenonstopfound 3 days agoOpen this trip
10 Dec$319jetBluenonstopfound 3 days agoOpen this trip
19 Dec$378jetBluenonstopfound 3 days agoOpen this trip
18 Dec$381jetBluenonstopfound 6 days agoOpen this trip

Every date we hold

7 departure dates

2 Dec: $400, found 2 days ago5 Dec: $319, found 3 days ago10 Dec: $319, found 3 days ago11 Dec: $496, found 3 days ago13 Dec: $278, found 2 days ago18 Dec: $381, found 6 days ago19 Dec: $378, found 3 days agoDec
See the chart as a table
The cheapest price seen for each departure date — per traveler in Economy.
DatesFromAirlineAirportsStopsFound
2 Dec$400jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 2 days agoOpen this trip
5 Dec$319jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 3 days agoOpen this trip
10 Dec$319jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 3 days agoOpen this trip
11 Dec$496jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 3 days agoOpen this trip
13 Dec$278jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 2 days agoOpen this trip
18 Dec$381jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 6 days agoOpen this trip
19 Dec$378jetBlueLong Island MacArthur Airport (ISP) → Fort Lauderdale-Hollywood International Airport (FLL)nonstopfound 3 days agoOpen this trip

Which month looks cheapest?

December 2026 is the cheapest month — from $278.

November 2026From $2924 departure dates22 Nov · found 4 days agoOpen this tripEvery date in November 2026
December 2026From $278Cheapest seen7 departure dates13 Dec · found 2 days agoOpen this trip
January 2027From $5891 departure date2 Jan 2027 · found 6 days agoOpen this trip

Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work