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Cheap flights from Islip, New York to Louisville from $249

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Louisville departing on 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Islip, New York to Louisville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
4:05 pm - 10:35 pm
ISP
-
SDF
6h 30m
1 stop
Southwest Logo
5:40 am - 9:55 am
SDF
-
ISP
4h 15m
1 stop
$249Southwest
Thu, Sep 17 - Sun, Sep 20
Southwest Logo
12:35 pm - 9:55 pm
ISP
-
SDF
9h 20m
2 stops
Southwest Logo
5:40 am - 9:55 am
SDF
-
ISP
4h 15m
1 stop
$255Southwest
Thu, Sep 10 - Sun, Sep 13
Southwest Logo
6:10 am - 10:00 am
ISP
-
SDF
3h 50m
1 stop
Southwest Logo
5:40 am - 9:55 am
SDF
-
ISP
4h 15m
1 stop
$258Southwest
Thu, Sep 10 - Sun, Sep 13
Breeze Airways Logo
5:27 pm - 10:11 am
ISP
-
SDF
16h 44m
1 stop
Breeze Airways Logo
9:42 pm - 11:20 am
SDF
-
ISP
13h 38m
2 stops
$264Breeze Airways
Tue, Sep 8 - Fri, Sep 11
Southwest Logo
1:15 pm - 9:55 pm
ISP
-
SDF
8h 40m
2 stops
Southwest Logo
5:40 am - 9:55 am
SDF
-
ISP
4h 15m
1 stop
$283Southwest
Thu, Sep 17 - Sun, Sep 20
Southwest Logo
6:05 am - 12:40 pm
ISP
-
SDF
6h 35m
1 stop
Southwest Logo
11:50 am - 4:25 pm
SDF
-
ISP
4h 35m
1 stop
$287Southwest
Tue, Sep 8 - Fri, Sep 11
Southwest Logo
6:05 am - 3:15 pm
ISP
-
SDF
9h 10m
2 stops
Southwest Logo
3:20 pm - 10:05 pm
SDF
-
ISP
6h 45m
2 stops
$298Southwest
Tue, Sep 8 - Fri, Sep 11
Southwest Logo
4:05 pm - 10:35 pm
ISP
-
SDF
6h 30m
1 stop
Southwest Logo
11:50 am - 4:25 pm
SDF
-
ISP
4h 35m
1 stop
$299Southwest
Thu, Aug 27 - Mon, Aug 31
Southwest Logo
4:05 pm - 10:35 pm
ISP
-
SDF
6h 30m
1 stop
Southwest Logo
1:45 pm - 10:05 pm
SDF
-
ISP
8h 20m
2 stops
$304Southwest
Thu, Aug 27 - Mon, Aug 31
Southwest Logo
1:15 pm - 9:55 pm
ISP
-
SDF
8h 40m
2 stops
Southwest Logo
9:00 am - 4:25 pm
SDF
-
ISP
7h 25m
2 stops
$309Southwest
Thu, Aug 27 - Mon, Aug 31

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Southwest flights from Islip, New York to Louisville

Our best Southwest deals on Islip, New York to Louisville flight tickets
Southwest
Sep 17
ISP4:05 pmIslip Long Island
6h 30m
1 stop
SDF10:35 pmLouisville Intl
Sep 20
SDF5:40 amLouisville Intl
4h 15m
1 stop
ISP9:55 amIslip Long Island
$249
Southwest
Sep 10
ISP12:35 pmIslip Long Island
9h 20m
2 stops
SDF9:55 pmLouisville Intl
Sep 13
SDF5:40 amLouisville Intl
4h 15m
1 stop
ISP9:55 amIslip Long Island
$255
Southwest
Sep 10
ISP6:10 amIslip Long Island
3h 50m
1 stop
SDF10:00 amLouisville Intl
Sep 13
SDF5:40 amLouisville Intl
4h 15m
1 stop
ISP9:55 amIslip Long Island
$258

Breeze Airways flights from Islip, New York to Louisville

Our best Breeze Airways deals on Islip, New York to Louisville flight tickets
Breeze Airways
Sep 8
ISP5:27 pmIslip Long Island
16h 44m
1 stop
SDF10:11 amLouisville Intl
Sep 11
SDF9:42 pmLouisville Intl
13h 38m
2 stops
ISP11:20 amIslip Long Island
$264
Breeze Airways
Jul 30
ISP7:49 pmIslip Long Island
12h 57m
2 stops
SDF8:46 amLouisville Intl
Jul 31
SDF8:28 pmLouisville Intl
17h 05m
1 stop
ISP1:33 pmIslip Long Island
$574
Breeze Airways
Sep 25
ISP11:52 amIslip Long Island
22h 19m
1 stop
SDF10:11 amLouisville Intl
Sep 28
SDF9:42 pmLouisville Intl
13h 38m
2 stops
ISP11:20 amIslip Long Island
$634

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to Louisville 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, momondo users made 832,500 searches. Data last updated July 8, 2026.
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

Cheapest round-trip

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 9/17

4:05 pm-10:35 pm

1 stop6h 30m

Louisville Intl

Sun 9/20

5:40 am-9:55 am

1 stop4h 15m

$249

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 9/10

12:35 pm-9:55 pm

2 stops9h 20m

Louisville Intl

Sun 9/13

5:40 am-9:55 am

1 stop4h 15m

$255
Quickest round-trip

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 9/10

6:10 am-10:00 am

1 stop3h 50m

Louisville Intl

Sun 9/13

5:40 am-9:55 am

1 stop4h 15m

$258

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 9/8

5:27 pm-10:11 am

1 stop16h 44m

Louisville Intl

Fri 9/11

9:42 pm-11:20 am

2 stops13h 38m

$264

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 9/17

1:15 pm-9:55 pm

2 stops8h 40m

Louisville Intl

Sun 9/20

5:40 am-9:55 am

1 stop4h 15m

$283

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 9/8

6:05 am-12:40 pm

1 stop6h 35m

Louisville Intl

Fri 9/11

11:50 am-4:25 pm

1 stop4h 35m

$287

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Tue 9/8

6:05 am-3:15 pm

2 stops9h 10m

Louisville Intl

Fri 9/11

3:20 pm-10:05 pm

2 stops6h 45m

$298

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 8/27

4:05 pm-10:35 pm

1 stop6h 30m

Louisville Intl

Mon 8/31

11:50 am-4:25 pm

1 stop4h 35m

$299

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 8/27

4:05 pm-10:35 pm

1 stop6h 30m

Louisville Intl

Mon 8/31

1:45 pm-10:05 pm

2 stops8h 20m

$304

IslipLouisville

ISP - SDF

ISPSDF

Islip Long Island

Thu 8/27

1:15 pm-9:55 pm

2 stops8h 40m

Louisville Intl

Mon 8/31

9:00 am-4:25 pm

2 stops7h 25m

$309

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Louisville from

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

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 $319. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Islip, New York to Louisville on a Monday will generally be more expensive and average around $625. 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 $365. At noon is when there is more demand to fly to Louisville, so prices are often more expensive at around $434 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

Fastest flight time

6h 30m

Direct flights

None
The fastest flight from Islip, New York to Louisville takes 6h 30m
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

Frequently asked questions about flying from Islip, New York to Louisville

  • 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 30m, 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.

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
French Lick
Elizabethtown
Jeffersonville
Bardstown
West Baden Springs
New Albany
Shepherdsville
Elizabeth
Charlestown
Corydon
Brandenburg
Georgetown
Springfield

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.

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