What is the cheapest airline that flies from Islip Long Island to Florida Keys?

Frontier, Southwest, and Breeze Airways are the most popular carriers operating from Islip Long Island to Florida Keys

What airlines fly to Florida Keys?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Florida Keys from Islip according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Florida Keys. Keep in mind that there are 4 different airlines that fly to Florida Keys on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Islip Long Island Airport to Florida Keys?

Prices for flights from Islip Long Island Airport to Florida Keys are updated daily.

How many operators does momondo search for flights from Islip Long Island Airport to Florida Keys?

As of September 2025, there are 5 operators available to choose from for flights from Islip Long Island Airport to Florida Keys.

How old do you have to be to fly from Islip Long Island Airport to Florida Keys?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Florida Keys.

What documentation or ID do you need to fly to Florida Keys?

The travel and health documents required for your trip to Florida Keys 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 Florida Keys. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$102 Cheap Flights from Islip to Florida Keys in 2025/26

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Find the cheapest flights from Islip to Florida Keys

Round-trip

One-way

Last minute

Cheap round-trip flights

4:58 pm - 8:15 amISP-EYW

15h 17m1 stop

10:47 am - 11:00 amEYW-ISP

24h 13m2 stops

$245Multiple Airlines

Find Deal

Sat, Oct 18 - Sat, Oct 25

12:55 pm - 8:45 pmISP-MIA

7h 50m1 stop

7:10 am - 12:15 pmMIA-ISP

5h 05m1 stop

$257Southwest

Find Deal

Thu, Dec 11 - Tue, Dec 16

6:15 am - 12:05 pmISP-MIA

5h 50m1 stop

12:40 pm - 10:05 pmMIA-ISP

9h 25m2 stops

$262Southwest

Find Deal

Thu, Dec 11 - Tue, Dec 16

3:45 pm - 9:00 pmISP-MIA

5h 15m1 stop

6:45 am - 11:15 amMIA-ISP

4h 30m1 stop

$267Southwest

Find Deal

Mon, Jan 12 - Fri, Jan 16

12:40 pm - 10:00 pmISP-MIA

9h 20m2 stops

6:30 am - 11:55 amMIA-ISP

5h 25m1 stop

$272Southwest

Find Deal

Mon, Jan 12 - Fri, Jan 16

9:54 am - 12:34 amISP-MIA

14h 40m2 stops

9:45 pm - 10:37 amMIA-ISP

12h 52m2 stops

$366Frontier

Find Deal

Fri, Oct 31 - Sun, Nov 2

4:58 pm - 8:18 amISP-MIA

15h 20m2 stops

4:05 pm - 9:44 amMIA-ISP

17h 39m2 stops

$373Frontier

Find Deal

Sat, Oct 11 - Tue, Oct 14

11:40 am - 9:17 amISP-EYW

21h 37m2 stops

9:57 am - 8:07 pmEYW-ISP

10h 10m2 stops

$628Breeze Airways

Find Deal

Thu, Nov 13 - Mon, Nov 17

11:40 am - 9:17 amISP-EYW

21h 37m2 stops

8:55 am - 1:45 pmEYW-ISP

28h 50m2 stops

$669Breeze Airways

Find Deal

Thu, Oct 16 - Thu, Oct 23

4:29 pm - 12:09 pmISP-EYW

19h 40m3 stops

1:04 pm - 9:55 amEYW-ISP

20h 51m2 stops

$877JetBlue

Find Deal

Sat, Oct 18 - Sat, Oct 25

Southwest flights from Islip to Florida Keys

Our best Southwest deals on Islip to Florida Keys flight tickets

Southwest

Dec 11

ISP12:55 pmIslip Long Island

7h 50m

1 stop

MIA8:45 pmMiami

Dec 16

MIA7:10 amMiami

5h 05m

1 stop

ISP12:15 pmIslip Long Island

$257

Find similar

Southwest

Dec 11

ISP6:15 amIslip Long Island

5h 50m

1 stop

MIA12:05 pmMiami

Dec 16

MIA12:40 pmMiami

9h 25m

2 stops

ISP10:05 pmIslip Long Island

$262

Find similar

Southwest

Jan 12

ISP3:45 pmIslip Long Island

5h 15m

1 stop

MIA9:00 pmMiami

Jan 16

MIA6:45 amMiami

4h 30m

1 stop

ISP11:15 amIslip Long Island

$267

Find similar

Frontier flights from Islip to Florida Keys

Our best Frontier deals on Islip to Florida Keys flight tickets

Frontier

Oct 31

ISP9:54 amIslip Long Island

14h 40m

2 stops

MIA12:34 amMiami

Nov 2

MIA9:45 pmMiami

12h 52m

2 stops

ISP10:37 amIslip Long Island

$366

Find similar

Frontier

Oct 11

ISP4:58 pmIslip Long Island

15h 20m

2 stops

MIA8:18 amMiami

Oct 14

MIA4:05 pmMiami

17h 39m

2 stops

ISP9:44 amIslip Long Island

$373

Find similar

Frontier

Oct 5

ISP5:12 pmIslip Long Island

15h 17m

2 stops

MIA8:29 amMiami

Oct 6

MIA9:16 pmMiami

23h 26m

2 stops

ISP8:42 pmIslip Long Island

$382

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Sat 10/18

4:58 pm-8:15 am

1 stop15h 17m

Key West

Sat 10/25

10:47 am-11:00 am

2 stops24h 13m

$245

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Thu 12/11

12:55 pm-8:45 pm

1 stop7h 50m

Miami

Tue 12/16

7:10 am-12:15 pm

1 stop5h 05m

$257

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Thu 12/11

6:15 am-12:05 pm

1 stop5h 50m

Miami

Tue 12/16

12:40 pm-10:05 pm

2 stops9h 25m

$262

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Mon 1/12

3:45 pm-9:00 pm

1 stop5h 15m

Miami

Fri 1/16

6:45 am-11:15 am

1 stop4h 30m

$267

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Mon 1/12

12:40 pm-10:00 pm

2 stops9h 20m

Miami

Fri 1/16

6:30 am-11:55 am

1 stop5h 25m

$272

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Fri 10/31

9:54 am-12:34 am

2 stops14h 40m

Miami

Sun 11/2

9:45 pm-10:37 am

2 stops12h 52m

$366

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Sat 10/11

4:58 pm-8:18 am

2 stops15h 20m

Miami

Tue 10/14

4:05 pm-9:44 am

2 stops17h 39m

$373

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Thu 11/13

11:40 am-9:17 am

2 stops21h 37m

Key West

Mon 11/17

9:57 am-8:07 pm

2 stops10h 10m

$628

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Thu 10/16

11:40 am-9:17 am

2 stops21h 37m

Key West

Thu 10/23

8:55 am-1:45 pm

2 stops28h 50m

$669

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Sat 10/18

4:29 pm-12:09 pm

3 stops19h 40m

Key West

Sat 10/25

1:04 pm-9:55 am

2 stops20h 51m

$877

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How to get the cheapest flight ticket from Islip to Florida Keys

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

Prices

Airlines

What is the cheapest month to fly to Florida Keys?

The month of October is another great option to travel to Florida Keys, with average flight prices from Islip averaging around $340.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from Islip to Florida Keys is on a Tuesday when prices can be found for as low as $317. The most expensive day to fly to Florida Keys is Saturday, with ticket prices averaging around $542.

What is the cheapest time of day to depart on your flight to Florida Keys?

According to our data, the cheapest time of day to fly to Florida Keys is in the evening. momondo users have found flights departing from Islip to Florida Keys in the evening for as low as $223. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $542.

How far in advance should I book a flight to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from Islip when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around $401 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from Islip for as low as $297 on momondo.

Can stopping save me money on Islip to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between Islip to Florida Keys.

Cheap Islip to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Florida Keys

Direct flights	None

There are no direct flights from Islip to Florida Keys. There are no popular flight routes from Islip to Florida Keys.

Search flight deals

When did momondo last update prices for flights from Islip Long Island Airport to Florida Keys?
Prices for flights from Islip Long Island Airport to Florida Keys are updated daily.
How many operators does momondo search for flights from Islip Long Island Airport to Florida Keys?
As of September 2025, there are 5 operators available to choose from for flights from Islip Long Island Airport to Florida Keys.
How old do you have to be to fly from Islip Long Island Airport to Florida Keys?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Florida Keys.
What documentation or ID do you need to fly to Florida Keys?
The travel and health documents required for your trip to Florida Keys 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 Florida Keys. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Islip to Florida Keys?
Based on momondo bookings for flights between Islip and Florida Keys, the leading plane model is Airbus A320-100/200, making up 19.83% of the total bookings. Other popular models include Airbus A320neo with 13.46%, Airbus A321neo with 9.94%, and Airbus A321-100/200 with 9.77%.

Why use momondo?

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

It is quick and easy to find Islip to Florida Keys flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Florida Keys that suits you.

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

All flight searches from Islip to Florida Keys on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to Florida Keys?

Once you have performed a search for Islip to Florida Keys 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 Florida Keys right now. Can momondo alert me if prices change?

Price alerts on flights to Florida Keys from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Florida Keys trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

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Find better results for your trip to Florida Keys

Popular cities in Florida Keys

Flights to New Yorkfrom $49

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Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

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Flights to Washington, D.C.from $49

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Flights to Dallasfrom $56

Flights to Seattlefrom $86

Cheap flights from Islip to Florida Keys from $102

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to Florida Keys departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Islip to Florida Keys

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Southwest flights from Islip to Florida Keys

Our best Southwest deals on Islip to Florida Keys flight tickets

Frontier flights from Islip to Florida Keys

Our best Frontier deals on Islip to Florida Keys flight tickets

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Use the filters below to find and compare flights from Islip to Florida Keys that are best for you.

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How to get the cheapest flight ticket from Islip to Florida Keys

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 is the cheapest month to fly to Florida Keys?

The month of October is another great option to travel to Florida Keys, with average flight prices from Islip averaging around $340.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from Islip to Florida Keys is on a Tuesday when prices can be found for as low as $317. The most expensive day to fly to Florida Keys is Saturday, with ticket prices averaging around $542.

What is the cheapest time of day to depart on your flight to Florida Keys?

How far in advance should I book a flight to Florida Keys?

Can stopping save me money on Islip to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between Islip to Florida Keys.

What is the cheapest airline that flies from Islip Long Island to Florida Keys?

Frontier, Southwest, and Breeze Airways are the most popular carriers operating from Islip Long Island to Florida Keys

What airlines fly to Florida Keys?

Cheap Islip to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Florida Keys

Direct flights

When did momondo last update prices for flights from Islip Long Island Airport to Florida Keys?

How many operators does momondo search for flights from Islip Long Island Airport to Florida Keys?

How old do you have to be to fly from Islip Long Island Airport to Florida Keys?

What documentation or ID do you need to fly to Florida Keys?

What is the most popular plane model from Islip to Florida Keys?

Why use momondo?

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

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

How can momondo help me find flights from Islip to Florida Keys?

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

An easier way to manage your Florida Keys trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Florida Keys

Popular cities in Florida Keys

Popular flights according to clicks in the last 7 days on momondo