SDF - ISP

$212 Find Cheap Flights from Louisville to Islip

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Islip departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Islip, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Islip, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Louisville to Islip (SDF-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Islip that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Islip

Tue, Sep 23 - Tue, Sep 30
Southwest Logo
6:00 am - 3:15 pmSDF-ISP
9h 15m2 stops
Southwest Logo
5:30 am - 11:10 amISP-SDF
5h 40m1 stop
$212Southwest
Find Deal
Tue, Sep 23 - Tue, Sep 30
Southwest Logo
6:00 am - 3:15 pmSDF-ISP
9h 15m2 stops
Southwest Logo
12:30 pm - 10:40 pmISP-SDF
10h 10m2 stops
$217Southwest
Find Deal
Tue, Sep 23 - Tue, Sep 30
Southwest Logo
3:50 pm - 10:05 pmSDF-ISP
6h 15m1 stop
Southwest Logo
4:00 pm - 7:55 pmISP-SDF
3h 55m1 stop
$271Southwest
Find Deal
Thu, Dec 11 - Sun, Dec 14
Breeze Airways Logo
2:55 pm - 1:45 pmSDF-ISP
22h 50m1 stop
Breeze Airways Logo
7:36 pm - 8:58 amISP-SDF
13h 22m2 stops
$547Breeze Airways
Find Deal
Sun, Dec 7 - Sun, Dec 14
Breeze Airways Logo
7:44 pm - 6:28 pmSDF-ISP
22h 44m1 stop
Breeze Airways Logo
7:36 pm - 8:58 amISP-SDF
13h 22m2 stops
$554Breeze Airways
Find Deal
Sun, Dec 7 - Wed, Dec 10
Breeze Airways Logo
7:44 pm - 6:28 pmSDF-ISP
22h 44m1 stop
Breeze Airways Logo
6:54 pm - 7:04 pmISP-SDF
24h 10m1 stop
$568Breeze Airways
Find Deal
Thu, Dec 11 - Sat, Dec 13
Breeze Airways Logo
2:55 pm - 1:45 pmSDF-ISP
22h 50m1 stop
Breeze Airways Logo
6:54 pm - 7:04 pmISP-SDF
24h 10m1 stop
$617Breeze Airways
Find Deal
Sun, Dec 7 - Thu, Dec 11
Breeze Airways Logo
7:44 pm - 1:45 pmSDF-ISP
18h 01m2 stops
Breeze Airways Logo
7:36 pm - 8:58 amISP-SDF
13h 22m2 stops
$624Breeze Airways
Find Deal
Sun, Dec 7 - Wed, Dec 10
Breeze Airways Logo
7:44 pm - 1:45 pmSDF-ISP
18h 01m2 stops
Breeze Airways Logo
6:54 pm - 7:04 pmISP-SDF
24h 10m1 stop
$637Breeze Airways
Find Deal
Fri, Dec 12 - Sun, Dec 14
Breeze Airways Logo
8:52 pm - 6:14 pmSDF-ISP
21h 22m2 stops
Breeze Airways Logo
7:36 pm - 8:58 amISP-SDF
13h 22m2 stops
$644Breeze Airways
Find Deal
Booking Insights

KAYAK's insights & trends for Louisville to Islip flights

Get data-powered insights and trends into flights from Louisville to Islip to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Louisville to Islip?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Louisville to Islip were found on Southwest ($212) and Breeze Airways ($547).

Good to know

Low seasonAugust
Cheapest flight$212
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Louisville to Islip

When to book flights from Louisville to Islip

Are your dates flexible? Find out the best times to travel from Louisville to Islip based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Louisville to Islip

  • What is the cheapest flight from Louisville to Islip?

    In the last 3 days, the lowest price for a flight from Louisville to Islip was $212 for a round-trip ticket.

  • Do I need a passport to fly between Louisville and Islip?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Louisville to Islip?

    On your way to Islip, you’ll fly out from Louisville Intl. You’ll be landing at Islip Long Island.

  • Which aircraft models fly most regularly from Louisville to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Louisville to Islip?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Islip.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Islip?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from Louisville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Islip?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Islip with an airline and back to Louisville with another airline. Booking your flights between Louisville and ISP can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Islip?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Islip from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Louisville to Islip

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Islip. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Islip? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

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

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