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Key West

$281+ Cheap flights from Islip, NY to Key West (ISP - EYW)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — EYW
Apr 18 — Apr 251
Sat 4/18
Sat 4/25
1 adult, Economy
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Cheap flight deals from Islip to Key West

Cheapest flights from Islip to Key West
Explore the most affordable flight options available from Islip to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 19, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/302:31 pm
ISP
-
EYW
2 stops21h 50m
Multiple Airlines
Fri 4/39:49 am
EYW
-
ISP
1 stop14h 34m
Multiple Airlines
Deal found 3/18$281
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:50 am
ISP
-
EYW
2 stops27h 52m
Multiple Airlines
Wed 4/2211:51 am
EYW
-
ISP
1 stop21h 42m
Multiple Airlines
Deal found 3/16$283
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/611:00 am
ISP
-
EYW
1 stop24h 25m
Multiple Airlines
Wed 6/105:07 pm
EYW
-
ISP
2 stops24h 03m
Multiple Airlines
Deal found 3/17$295
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:50 am
ISP
-
EYW
2 stops27h 52m
Multiple Airlines
Sun 4/511:01 am
EYW
-
ISP
1 stop14h 37m
Multiple Airlines
Deal found 3/17$366
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:31 pm
ISP
-
EYW
1 stop12h 38m
Multiple Airlines
Sun 4/193:50 pm
EYW
-
ISP
1 stop17h 23m
Multiple Airlines
Deal found 3/16$390
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/2511:50 am
ISP
-
EYW
2 stops21h 16m
Multiple Airlines
Fri 3/279:49 am
EYW
-
ISP
1 stop23h 59m
Multiple Airlines
Deal found 3/19$391
This Kiwi.com deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/25:30 am
ISP
-
EYW
1 stop10h 12m
Multiple Airlines
Mon 4/69:49 am
EYW
-
ISP
1 stop14h 34m
Multiple Airlines
Deal found 3/18$416

Find flight deals from Islip to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$281
(Kiwi.com)

Popular in

April

Cheapest in

September

Average price

$494
Provider with most accurate pricing for Islip Long Island-Key West flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Key West flights.
Search Deals
From Islip Long Island to Key West
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Key West 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, Cheapflights users made 2,558,603 searches. Data last updated March 19, 2026.
Use the filters below to find and compare flights from Islip to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Mon 3/30

10:58 am-12:21 pm

1 stop25h 23m

Key West

Fri 4/3

9:49 am-12:23 am

1 stop14h 34m

$307
Quickest round-trip

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Thu 4/16

8:31 pm-9:09 am

1 stop12h 38m

Key West

Sun 4/19

3:50 pm-9:13 am

1 stop17h 23m

$390

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Tue 4/7

5:43 pm-11:11 am

1 stop17h 28m

Key West

Sun 4/12

4:22 pm-5:44 pm

1 stop25h 22m

$606

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Wed 4/15

11:50 am-3:42 pm

2 stops27h 52m

Key West

Wed 4/22

11:51 am-6:46 pm

3 stops30h 55m

$716

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Fri 4/17

8:45 pm-10:21 am

2 stops37h 36m

Key West

Fri 4/24

11:04 am-11:10 am

1 stop24h 06m

$727

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Sat 6/6

11:57 am-10:24 am

2 stops22h 27m

Key West

Wed 6/10

11:46 am-6:06 pm

2 stops30h 20m

$762

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Mon 3/30

8:45 pm-11:11 am

2 stops38h 26m

Key West

Fri 4/3

9:49 am-11:10 am

2 stops25h 21m

$771

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Thu 4/16

11:55 am-9:09 am

2 stops21h 14m

Key West

Sun 4/19

4:22 pm-1:31 pm

2 stops21h 09m

$822
Cheapest one-way

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Fri 3/27

10:58 am-8:26 am

3 stops45h 28m

$302

IslipKey West

ISP - EYW

ISPEYW

Islip Long Island

Fri 4/17

8:45 pm-10:21 am

2 stops37h 36m

$411

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

Compare providers for flights from Islip to Key West

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Key West in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Key West flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Key West flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Key West flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Key West flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Key West flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Key West

What is the cheapest month to book a flight from Islip, New York to Key West?

Currently, May is the cheapest month in which you can book a flight from Islip, New York to Key West (average of $131). Flying from Islip, New York to Key West in August is currently the most expensive (average of $312). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Islip to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Islip to Key West that include hotel bookings?

    Yes. In addition to deals on Islip to Key West flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Key West?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Key West.

  • Can I find deals for business class flights from Islip to Key West?

    Yes. Cheapflights offers flight deals from Islip to Key West by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Key West?

    Currently, May is the cheapest month in which you can book a flight from Islip, New York to Key West (average of $131). Flying from Islip, New York to Key West in August is currently the most expensive (average of $312). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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