How long is the flight from Islip to Louisville?

There are many flights that can get you from Islip to Louisville in 4h 45m. Fly via Southwest to get the fastest option. There are 697 mi between Islip and Louisville.

In terms of precipitation, rainfall in Louisville ranges from 3.1 - 5.3 inches per month. May is typically the wettest month, when rainfall can reach 5.3 in. September is typically the driest time to visit Louisville when rainfall is around 3.1 in.

If weather is an important factor for your trip to Louisville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

How far in advance should I book a flight from Islip to Louisville?

Users have found that booking a flight from Islip to Louisville at least 28 days early can save you up to 35% on average compared to booking a flight this week. If booking 28 days before your flight isn’t an option for you, users have found flights from Islip to Louisville for as little as $283 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $388 for flights departing within the next 3 days.

What is the cheapest month to fly from Islip to Louisville?

The best pricing can be found in the month of January. Prices to Louisville from Islip average $315. You can even find prices in January for less than $315, as users have found deals to Louisville from as low as $199. The month of December appears to be one of the more expensive times to travel to Louisville from Islip. Flying in the targeted month can save you up to 30%.

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

When flying from Islip to Louisville, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Islip to Louisville?

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

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

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

$154+ Flights from Islip to Louisville

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Cheap flight deals from Islip to Louisville

Round-trip from	$241 (Kiwi.com)
One-way from	$154 (Kiwi.com)
Popular in	December
Cheapest in	January
Average price	$352

From Islip Long Island to Louisville Intl

Search Deals

One-way flight from Islip Long Island to Louisville Intl

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Highest demand for flights based on searches. 8% potential increase in price ($27 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Islip to Louisville

Cheapest flights from Islip to Louisville
Explore the most affordable flight options available from Islip to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Tue 10/149:37 pmISP - SDF

1 stop20h 18mMultiple Airlines

Thu 10/167:15 amSDF - ISP

1 stop13h 27mMultiple Airlines

Deal found 9/11

$241

Tue 10/214:55 pmISP - SDF

1 stop4h 45mSouthwest

Fri 10/245:40 amSDF - ISP

1 stop6h 10mSouthwest

Deal found 9/9

$244

Wed 10/88:45 pmISP - SDF

1 stop22h 31mMultiple Airlines

Wed 10/155:31 pmSDF - ISP

2 stops41h 06mMultiple Airlines

Deal found 9/10

$359

Fri 9/265:05 pmISP - SDF

1 stop21h 55mMultiple Airlines

Sun 9/287:42 pmSDF - ISP

1 stop22h 46mMultiple Airlines

Deal found 9/11

$427

Tue 10/141:10 pmISP - SDF

2 stops9h 35mSouthwest

Thu 10/161:20 pmSDF - ISP

2 stops10h 25mSouthwest

Deal found 9/11

$433

Thu 9/1111:25 amISP - SDF

1 stop21h 54mMultiple Airlines

Wed 10/155:31 pmSDF - ISP

2 stops27h 11mMultiple Airlines

Deal found 9/10

$495

Best flights from Islip to Louisville
Discover carefully curated flight deals from Islip to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Tue 10/214:55 pmISP - SDF

1 stop4h 45mSouthwest

Fri 10/245:40 amSDF - ISP

1 stop6h 10mSouthwest

Deal found 9/9

$244

Tue 10/149:37 pmISP - SDF

2 stops18h 59mMultiple Airlines

Thu 10/168:50 pmSDF - ISP

1 stop13h 47mMultiple Airlines

Deal found 9/11

$293

Wed 12/105:54 pmISP - SDF

1 stop25h 10mBreeze Airways

Fri 12/128:52 pmSDF - ISP

2 stops20h 22mBreeze Airways

Deal found 9/9

$619

Wed 10/88:45 pmISP - SDF

1 stop22h 31mMultiple Airlines

Wed 10/155:31 pmSDF - ISP

2 stops41h 06mMultiple Airlines

Deal found 9/10

$359

Tue 10/141:10 pmISP - SDF

2 stops9h 35mSouthwest

Thu 10/161:20 pmSDF - ISP

2 stops10h 25mSouthwest

Deal found 9/11

$433

Fri 9/265:05 pmISP - SDF

1 stop21h 55mMultiple Airlines

Sun 9/287:42 pmSDF - ISP

1 stop22h 46mMultiple Airlines

Deal found 9/11

$427

Last-minute flights from Islip to Louisville
Discover last-minute flight deals from Islip to Louisville. Data last updated September 11, 2025 and is based on user searches.

Thu 9/1111:25 amISP - SDF

1 stop21h 54mMultiple Airlines

Wed 10/155:31 pmSDF - ISP

2 stops27h 11mMultiple Airlines

Deal found 9/10

$495

Fri 9/265:05 pmISP - SDF

1 stop21h 55mMultiple Airlines

Sun 9/287:42 pmSDF - ISP

1 stop22h 46mMultiple Airlines

Deal found 9/11

$427

Wed 10/88:45 pmISP - SDF

1 stop22h 31mMultiple Airlines

Wed 10/155:31 pmSDF - ISP

2 stops41h 06mMultiple Airlines

Deal found 9/10

$359

Tue 10/149:37 pmISP - SDF

1 stop20h 18mMultiple Airlines

Thu 10/167:15 amSDF - ISP

1 stop13h 27mMultiple Airlines

Deal found 9/11

$241

Tue 10/141:10 pmISP - SDF

2 stops9h 35mSouthwest

Thu 10/161:20 pmSDF - ISP

2 stops10h 25mSouthwest

Deal found 9/11

$433

Tue 10/214:55 pmISP - SDF

1 stop4h 45mSouthwest

Fri 10/245:40 amSDF - ISP

1 stop6h 10mSouthwest

Deal found 9/9

$244

One-way flights from Islip to Louisville
Search for one-way flight options from Islip to Louisville. Find affordable one-way fares based on user searches. Data last updated September 11, 2025.

Mon 9/295:05 pmISP - SDF

1 stop16h 14mMultiple Airlines

Deal found 9/11

$154

Wed 10/111:35 amISP - SDF

1 stop21h 44mMultiple Airlines

Deal found 9/11

$178

Sat 10/45:18 pmISP - SDF

3 stops41h 34mMultiple Airlines

Deal found 9/11

$210

Thu 10/25:35 pmISP - SDF

2 stops6h 05mSouthwest

Deal found 9/11

$224

Sun 10/511:25 amISP - SDF

2 stops23h 27mMultiple Airlines

Deal found 9/11

$231

Fri 10/35:12 pmISP - SDF

3 stops39h 52mMultiple Airlines

Deal found 9/11

$241

Sun 10/197:36 pmISP - SDF

2 stops13h 22mBreeze Airways

Deal found 9/9

$275

Fly from

Fly to

Route

Depart

Return

Price

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 10/21

4:55 pm-9:40 pm

1 stop4h 45m

Louisville Intl

Fri 10/24

5:40 am-11:50 am

1 stop6h 10m

$244

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 10/14

9:37 pm-4:36 pm

2 stops18h 59m

Louisville Intl

Thu 10/16

8:50 pm-10:37 am

1 stop13h 47m

$293

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 10/8

8:45 pm-7:16 pm

1 stop22h 31m

Louisville Intl

Wed 10/15

5:31 pm-10:37 am

2 stops41h 06m

$359

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Fri 9/26

5:05 pm-3:00 pm

1 stop21h 55m

Louisville Intl

Sun 9/28

7:42 pm-6:28 pm

1 stop22h 46m

$427

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 10/14

1:10 pm-10:45 pm

2 stops9h 35m

Louisville Intl

Thu 10/16

1:20 pm-11:45 pm

2 stops10h 25m

$433

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 12/10

5:54 pm-7:04 pm

1 stop25h 10m

Louisville Intl

Fri 12/12

8:52 pm-5:14 pm

2 stops20h 22m

$619

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Mon 9/29

5:05 pm-9:19 am

1 stop16h 14m

$154

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 10/2

5:35 pm-12:10 am

1 stop6h 35m

$154

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 10/1

11:35 am-9:19 am

1 stop21h 44m

$178

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Sat 10/4

5:18 pm-10:52 am

3 stops41h 34m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 14 results

Best time to book a flight from Islip to Louisville

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

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

Currently, January is the cheapest month in which you can book a flight from Islip to Louisville (average of $299). Flying from Islip to Louisville in April is currently the most expensive (average of $369). 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

How long is the flight from Islip to Louisville?
There are many flights that can get you from Islip to Louisville in 4h 45m. Fly via Southwest to get the fastest option. There are 697 mi between Islip and Louisville.
Can I find deals for flights from Islip to Louisville that include hotel bookings?
Yes. In addition to deals on Islip to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Louisville?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Louisville.
Can I find deals for business class flights from Islip to Louisville?
Yes. Cheapflights offers flight deals from Islip to Louisville 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 to Louisville?
Currently, January is the cheapest month in which you can book a flight from Islip to Louisville (average of $299). Flying from Islip to Louisville in April is currently the most expensive (average of $369). 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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Corydon

Bardstown

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$154+ Cheap flights from Islip to Louisville (ISP - SDF)

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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Louisville with Cheapflights

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Cheap flight deals from Islip to Louisville

Round-trip from

One-way from

Popular in

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Find flight deals from Islip to Louisville

Cheapest flights from Islip to LouisvilleExplore the most affordable flight options available from Islip to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Explore the most affordable flight options available from Islip to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Islip to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Islip with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Islip to Louisville

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

Related info for your journey

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

How long is the flight from Islip to Louisville?

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

How can I find direct flights from Islip to Louisville?

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

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

Traveling to a place near Louisville?

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Cheapest flights from Islip to Louisville
Explore the most affordable flight options available from Islip to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.