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Islip

$305+ Cheap flights from Louisville to Islip, NY (SDF - ISP)

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ISP
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Louisville to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Islip (ISP). 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 July 29, 2025.

Round-trip from

$423
(Southwest)

One-way from

$305
(KAYAK)

Popular in

October

Cheapest in

August

Average price

$345
From Louisville Intl to Islip Long Island
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One-way flight from Louisville Intl to Islip Long Island
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Highest demand for flights based on searches. 20% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Louisville to Islip

Cheapest flights from Louisville to Islip
Explore the most affordable flight options available from Louisville to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Southwest deal was found by Cheapflights users on 7/27. 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 12/15:05 amSDF - ISP
1 stop6h 50mSouthwest
Fri 12/512:55 pmISP - SDF
1 stop9h 55mSouthwest
Deal found 7/27$423
This KAYAK deal was found by Cheapflights users on 7/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/112:55 pmSDF - ISP
1 stop22h 50mBreeze Airways
Sun 12/147:36 pmISP - SDF
2 stops13h 22mBreeze Airways
Deal found 7/29$547
This United deal was found by Cheapflights users on 7/27. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/286:08 pmSDF - ISP
2 stops19h 16mMultiple Airlines
Mon 8/42:19 pmISP - SDF
2 stops20h 08mMultiple Airlines
Deal found 7/27$980

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Islip 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 July 29, 2025.
Use the filters below to find and compare flights from Louisville to Islip that are best for you.

Fly from

Louisville

Fly to

Islip

Route

Depart

Return

Price

LouisvilleIslip

SDF - ISP

SDFISP

Louisville Intl

Mon 12/1

5:05 am-11:55 am

1 stop6h 50m

Islip Long Island

Fri 12/5

12:55 pm-10:50 pm

1 stop9h 55m

$423

LouisvilleIslip

SDF - ISP

SDFISP

Louisville Intl

Thu 12/11

2:55 pm-1:45 pm

1 stop22h 50m

Islip Long Island

Sun 12/14

7:36 pm-8:58 am

2 stops13h 22m

$547

LouisvilleIslip

SDF - ISP

SDFISP

Louisville Intl

Thu 9/11

7:42 pm-6:28 pm

1 stop22h 46m

$305

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Louisville to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Louisville 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 Louisville to Islip

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

Currently, January is the cheapest month in which you can book a flight from Louisville to Islip, New York (average of $108). Flying from Louisville to Islip, New York in November is currently the most expensive (average of $213). 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.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Southwest and Breeze Airways from Louisville to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Breeze Airways
8.0
Very good
190 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Crew

8.6

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

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

  • What are the cheapest airlines flying from Louisville to Islip, New York round-trip?

    Our cheapest airline available from Louisville to Islip, New York is Southwest. Our recent data shows that you can find tickets from as low as $423 on this airline. An additional option worth looking into is Breeze Airways, starting at $547.

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

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

  • How can I find direct flights from Louisville to Islip?

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

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

    Yes. Cheapflights offers flight deals from Louisville to Islip 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 Louisville to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from Louisville to Islip, New York (average of $108). Flying from Louisville to Islip, New York in November is currently the most expensive (average of $213). 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

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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Top airline flying from Louisville to Islip

Discover the top airline that operate flights from Louisville to Islip. 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$276Average$322FlexibilityNo cancel feeOn-time63%

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