$109 Cheap Flights from Islip (ISP) to Louisville (SDF)

Popular airlines from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF)

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Cheap Flights from Islip to Louisville (ISP-SDF)

Prices were available within the past 7 days and start at $109 for one-way flights and $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
Breeze Airways

Alternative airports near Louisville

Prices were available within the past 7 days. Prices and availability are subject to change.

Flights from Islip (ISP) to Louisville (SDF)
Origin airport
MacArthur
Destination airport
Louisville Intl.
Airlines serving
Breeze Airways, Southwest Airlines
Roundtrip price
$243
Distance
697 mi

Islip to Louisville Flights

The cheapest times to fly from Islip to Louisville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Louisville are during the month of October. You can find some of the cheapest flights from Islip to Louisville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Louisville

Sunday is one of the best days to book for cheap flights from Islip to Louisville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Louisville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Louisville in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Louisville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Louisville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF) cost?
Discover the latest flight deals from ISP to SDF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ISP to SDF?
The cheapest flights from ISP to SDF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ISP to SDF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ISP to SDF. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF)?
You'll have to take a flight with a layover when traveling from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from ISP to SDF?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF)?
To reach Louisville Intl. Airport (SDF) without delays, choose a flight that takes off from MacArthur Airport (ISP) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF) last-minute?
Booking your plane ticket from ISP to SDF right before your getaway is generally more expensive. But if you're flexible with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book an ISP to SDF flight and hotel package?
Compared with arranging hotels and flights separately, booking an ISP to SDF flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place takes the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Louisville Intl. Airport (SDF)?
It's generally possible to cancel or reschedule your ISP to SDF flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.