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Key Largo

$100+ Cheap flights from Islip, NY (ISP) to Key Largo, FL

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MIA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Islip Long Island to Key Largo are usually found in January or October, booked 28 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Find flight deals from Islip to Key Largo

Cheapest flights from Islip to Key Largo
Explore the most affordable flight options available from Islip to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:57 pmISP - MIA
2 stops19h 28mFrontier
Thu 11/139:45 pmMIA - ISP
2 stops12h 52mFrontier
Deal found 10/30$275
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:15 amISP - MIA
1 stop5h 50mSouthwest
Fri 12/126:00 amMIA - ISP
1 stop10h 55mSouthwest
Deal found 10/29$282
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 11/2710:02 amISP - MIA
2 stops29h 23mMultiple Airlines
Thu 12/412:10 pmMIA - ISP
1 stop25h 35mMultiple Airlines
Deal found 10/30$297
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:37 pmISP - MIA
2 stops16h 40mFrontier
Thu 11/206:21 pmMIA - ISP
2 stops16h 16mFrontier
Deal found 10/30$314
This Southwest deal was found by Cheapflights users on 10/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:55 amISP - MIA
1 stop6h 10mSouthwest
Mon 12/86:55 amMIA - ISP
2 stops8h 10mSouthwest
Deal found 10/30$349
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:15 pmISP - MIA
2 stops11h 31mFrontier
Mon 12/86:00 amMIA - ISP
2 stops17h 59mFrontier
Deal found 10/28$352
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:58 pmISP - MIA
2 stops13h 21mFrontier
Sun 11/99:45 pmMIA - ISP
2 stops12h 52mFrontier
Deal found 10/29$355
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:40 amISP - MIA
1 stop5h 25mSouthwest
Wed 12/107:10 amMIA - ISP
1 stop5h 05mSouthwest
Deal found 10/29$362

Cheap flight deals from Islip to Key Largo

Keep the following information in mind while searching for Islip to Key Largo flight deals. Data was last updated October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$209
(Kiwi.com)

One-way from

$100
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$309
Provider with most accurate pricing for New York (NYC)-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Miami flights.
Search Deals
From Islip Long Island to Key Largo
Search Deals
One-way flight from Islip Long Island to Key Largo
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Key Largo 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 October 30, 2025.
Use the filters below to find and compare flights from Islip to Key Largo that are best for you.

Fly from

Islip

Fly to

Key Largo

Route

Depart

Return

Price

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Sat 1/17

12:35 pm-1:35 pm

2 stops25h 00m

Miami

Thu 1/29

6:14 pm-1:21 pm

1 stop19h 07m

$209

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Mon 1/19

5:55 am-11:15 am

1 stop5h 20m

Miami

Thu 1/22

7:15 am-11:55 am

1 stop4h 40m

$257

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Mon 12/8

6:15 am-12:05 pm

1 stop5h 50m

Miami

Fri 12/12

6:00 am-4:55 pm

1 stop10h 55m

$282

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Fri 1/9

6:00 am-4:10 pm

1 stop10h 10m

Miami

Mon 1/12

7:15 am-11:55 am

1 stop4h 40m

$282

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Thu 2/26

5:35 am-11:15 am

1 stop5h 40m

Miami

Sat 2/28

7:00 am-12:05 pm

1 stop5h 05m

$297

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Sat 12/6

6:00 am-2:20 pm

1 stop8h 20m

Miami

Mon 12/8

6:55 am-12:30 pm

1 stop5h 35m

$302

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Mon 11/10

9:54 am-12:34 am

2 stops14h 40m

Miami

Fri 11/14

9:45 pm-10:37 am

2 stops12h 52m

$305

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Thu 2/5

11:50 am-5:10 pm

1 stop5h 20m

Miami

Sun 2/8

7:15 am-11:55 am

1 stop4h 40m

$307

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Thu 11/13

6:37 pm-11:17 am

2 stops16h 40m

Miami

Thu 11/20

6:21 pm-10:37 am

2 stops16h 16m

$314

IslipMiami

ISP - MIA

ISPMIA

Islip Long Island

Wed 11/12

4:58 pm-12:34 am

2 stops31h 36m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 19 results
1
2

Best time to book a flight from Islip to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo 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 Largo

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

Currently, March is the cheapest month in which you can book a flight from Islip, New York to Key Largo (average of $36). Flying from Islip, New York to Key Largo in August is currently the most expensive (average of $86). 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.

What is the cheapest time of day to fly from ISP to KE9?

Find hourly flight availability from Islip to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s typically best to fly out from Islip, New York to Key Largo in the evening. Doing so could potentially save you 39% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Islip, New York to Key Largo?

Use this chart to determine the cheapest time to fly round-trip from Islip to Key Largo. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Islip, New York to Key Largo flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Islip, New York to Key Largo?

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key Largo. Reviews last updated October 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and JetBlue from Islip to Key Largo to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
JetBlue
7.2
Good
2,906 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Spirit Airlines
6.3
Okay
8,116 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,123 reviews
Southwest
8.0
Very good
4,243 reviews

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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

  • What airport do you fly from for flights from Islip to Key Largo?

    For a flight from Islip to Key Largo, you will be flying from Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 outbound flights to Key Largo per day. 5 airlines have flights to Key Largo from Islip Long Island on a regular basis.

  • How popular is this Islip, New York to Key Largo flight route?

    This flight path from Islip Long Island to Key Largo was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Islip, New York to Key Largo?

    Airlines like Southwest fly from Islip, New York to Key Largo in about 5h 20m. The time it takes to get you to your destination can typically vary by up to . The distance from Islip, New York to Key Largo is about 1114 mi.

  • What are the cheapest flights from Islip, New York to Key Largo?

    While on average a flight from Islip, New York to Key Largo is generally $463, our data shows the cheapest flight currently is $463. When looking at the most popular route, (Islip Long Island - Miami), you can expect to pay $209 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Key Largo 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 Largo?

    Currently, March is the cheapest month in which you can book a flight from Islip, New York to Key Largo (average of $36). Flying from Islip, New York to Key Largo in August is currently the most expensive (average of $86). 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

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Top 5 airlines flying from Islip to Key Largo

Discover the top 5 airlines that operate flights from Islip to Key Largo. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$39Average$166FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$60Average$164FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$116Average$314FlexibilityNo cancel feeOn-time62%
DeltaCheapest$142Average$288FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$166Average$406FlexibilityNo cancel feeOn-time63%

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