What airlines fly to Louisville?

Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Louisville from Islip, New York according to our data. Delta is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Louisville. Keep in mind that there are 6 different airlines that fly to Louisville on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Islip Long Island to Louisville Intl?

Southwest is the most popular carrier operating from Islip Long Island to Louisville Intl

When did momondo last update prices for flights from Islip Long Island Airport to Louisville Intl Airport?

Prices for flights from Islip Long Island Airport to Louisville Intl Airport are refreshed on a daily basis.

How old do you have to be to fly from Islip Long Island Airport to Louisville Intl Airport?

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 Louisville Intl Airport.

What documentation or ID do you need to fly to Louisville Intl Airport?

The required travel and health documents for your Louisville Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Louisville Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$140 Cheap Flights from Islip to Louisville in 2025/26

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Find the cheapest flights from Islip, New York to Louisville

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Cheap round-trip flights

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8:45 pm - 7:25 pmISP-SDF

22h 40m1 stop

2:55 pm - 8:02 amSDF-ISP

17h 07m2 stops

$363Multiple Airlines

Find Deal

Wed, Nov 19 - Sun, Nov 23

5:50 pm - 12:50 amISP-SDF

7h 00m1 stop

5:25 am - 11:40 amSDF-ISP

6h 15m1 stop

$395Southwest

Find Deal

Sat, Mar 14 - Fri, Mar 20

6:00 am - 2:40 pmISP-SDF

8h 40m2 stops

5:25 am - 11:40 amSDF-ISP

6h 15m1 stop

$400Southwest

Find Deal

Sat, Mar 14 - Fri, Mar 20

6:00 am - 2:40 pmISP-SDF

8h 40m2 stops

8:35 am - 5:20 pmSDF-ISP

8h 45m2 stops

$423Southwest

Find Deal

Sat, Mar 14 - Fri, Mar 20

8:45 pm - 7:25 pmISP-SDF

22h 40m1 stop

2:55 pm - 1:45 pmSDF-ISP

22h 50m1 stop

$432Breeze Airways

Find Deal

Wed, Nov 19 - Sun, Nov 23

2:45 pm - 12:05 amISP-SDF

9h 20m2 stops

5:05 am - 11:55 amSDF-ISP

6h 50m1 stop

$482Southwest

Find Deal

Tue, Dec 23 - Sun, Dec 28

5:50 pm - 12:30 amISP-SDF

6h 40m1 stop

5:05 am - 11:55 amSDF-ISP

6h 50m1 stop

$488Southwest

Find Deal

Tue, Dec 23 - Sun, Dec 28

6:00 am - 2:40 pmISP-SDF

8h 40m2 stops

8:45 am - 5:05 pmSDF-ISP

8h 20m2 stops

$491Southwest

Find Deal

Sat, Mar 14 - Sun, Mar 22

8:21 pm - 2:15 pmISP-SDF

17h 54m3 stops

2:55 pm - 1:45 pmSDF-ISP

22h 50m1 stop

$654Breeze Airways

Find Deal

Wed, Nov 19 - Sun, Nov 23

8:21 pm - 2:15 pmISP-SDF

17h 54m3 stops

8:05 pm - 11:00 amSDF-ISP

38h 55m2 stops

$700Breeze Airways

Find Deal

Wed, Nov 19 - Sun, Nov 23

Southwest flights from Islip, New York to Louisville

Our best Southwest deals on Islip, New York to Louisville flight tickets

Southwest

Mar 14

ISP5:50 pmIslip Long Island

7h 00m

1 stop

SDF12:50 amLouisville Intl

Mar 20

SDF5:25 amLouisville Intl

6h 15m

1 stop

ISP11:40 amIslip Long Island

$395

Find similar

Southwest

Mar 14

ISP6:00 amIslip Long Island

8h 40m

2 stops

SDF2:40 pmLouisville Intl

Mar 20

SDF5:25 amLouisville Intl

6h 15m

1 stop

ISP11:40 amIslip Long Island

$400

Find similar

Southwest

Mar 14

ISP6:00 amIslip Long Island

8h 40m

2 stops

SDF2:40 pmLouisville Intl

Mar 20

SDF8:35 amLouisville Intl

8h 45m

2 stops

ISP5:20 pmIslip Long Island

$423

Find similar

Breeze Airways flights from Islip, New York to Louisville

Our best Breeze Airways deals on Islip, New York to Louisville flight tickets

Breeze Airways

Nov 19

ISP8:45 pmIslip Long Island

22h 40m

1 stop

SDF7:25 pmLouisville Intl

Nov 23

SDF2:55 pmLouisville Intl

22h 50m

1 stop

ISP1:45 pmIslip Long Island

$432

Find similar

Breeze Airways

Nov 19

ISP8:21 pmIslip Long Island

17h 54m

3 stops

SDF2:15 pmLouisville Intl

Nov 23

SDF2:55 pmLouisville Intl

22h 50m

1 stop

ISP1:45 pmIslip Long Island

$654

Find similar

Breeze Airways

Nov 19

ISP8:21 pmIslip Long Island

17h 54m

3 stops

SDF2:15 pmLouisville Intl

Nov 23

SDF8:05 pmLouisville Intl

38h 55m

2 stops

ISP11:00 amIslip Long Island

$700

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 11/19

8:45 pm-7:25 pm

1 stop22h 40m

Louisville Intl

Sun 11/23

2:55 pm-8:02 am

2 stops17h 07m

$363

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Sat 3/14

5:50 pm-12:50 am

1 stop7h 00m

Louisville Intl

Fri 3/20

5:25 am-11:40 am

1 stop6h 15m

$395

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Sat 3/14

6:00 am-2:40 pm

2 stops8h 40m

Louisville Intl

Fri 3/20

5:25 am-11:40 am

1 stop6h 15m

$400

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Sat 3/14

6:00 am-2:40 pm

2 stops8h 40m

Louisville Intl

Fri 3/20

8:35 am-5:20 pm

2 stops8h 45m

$423

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 11/19

8:45 pm-7:25 pm

1 stop22h 40m

Louisville Intl

Sun 11/23

2:55 pm-1:45 pm

1 stop22h 50m

$432

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 12/23

2:45 pm-12:05 am

2 stops9h 20m

Louisville Intl

Sun 12/28

5:05 am-11:55 am

1 stop6h 50m

$482

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 12/23

5:50 pm-12:30 am

1 stop6h 40m

Louisville Intl

Sun 12/28

5:05 am-11:55 am

1 stop6h 50m

$488

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Sat 3/14

6:00 am-2:40 pm

2 stops8h 40m

Louisville Intl

Sun 3/22

8:45 am-5:05 pm

2 stops8h 20m

$491

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 11/19

8:21 pm-2:15 pm

3 stops17h 54m

Louisville Intl

Sun 11/23

2:55 pm-1:45 pm

1 stop22h 50m

$654

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Wed 11/19

8:21 pm-2:15 pm

3 stops17h 54m

Louisville Intl

Sun 11/23

8:05 pm-11:00 am

2 stops38h 55m

$700

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Louisville

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 day to depart on your flight to Louisville?

On average, the least expensive day to fly to Louisville from Islip, New York is on a Saturday. momondo users have found tickets for Saturday departures for as low as $292. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Islip, New York to Louisville on a Sunday will generally be more expensive and average around $380. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest Islip, New York to Louisville flights are usually those with departure times in the evening. Our users have found flights to Louisville in the evening for as low as $305. At noon is when there is more demand to fly to Louisville, so prices are often more expensive at around $358 per ticket.

When to book flights from Islip, New York to Louisville

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Louisville according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Islip, New York to Louisville (ISP to SDF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Louisville

Direct flights	None

There are no direct flights from Islip, New York to Louisville. There are no popular flight routes from Islip, New York to Louisville.

Search flight deals

How far is Islip Long Island to Louisville Intl by plane?
The straight-line distance from Islip Long Island to Louisville Intl is 689.3 mi. Flights usually cover this in 6h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Islip Long Island Airport to Louisville Intl Airport?
Prices for flights from Islip Long Island Airport to Louisville Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Islip Long Island Airport to Louisville Intl Airport?
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 Louisville Intl Airport.
What documentation or ID do you need to fly to Louisville Intl Airport?
The required travel and health documents for your Louisville Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Louisville Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

French Lick

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West Baden Springs

Bardstown

Jeffersonville

Shepherdsville

New Albany

Elizabeth

Corydon

Charlestown

Springfield

Georgetown

Brandenburg

Why use momondo?

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

It is quick and easy to find Islip to Louisville 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 Louisville that suits you.

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

Yes. momondo enables you to select and highlight flights to Louisville from Islip with this policy.

How can momondo help me find flights from Islip to Louisville?

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

If you are not ready to book a flight from Islip to Louisville now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Louisville and let you know when they change.