$94 Cheap Flights from Louisville (SDF) to Islip (ISP)

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

Cheap Flights from Louisville to Islip (SDF-ISP)

Prices were available within the past 7 days and start at $94 for one-way flights and $203 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
Flights from Louisville (SDF) to Islip (ISP)
Origin airport
Louisville Intl.
Destination airport
MacArthur
Airlines serving
Breeze Airways, Southwest Airlines
Roundtrip price
$203
Distance
697 mi

Louisville to Islip Flights

The cheapest times to fly from Louisville to Islip

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 Louisville to Islip are during the month of December. You can find some of the cheapest flights from Louisville to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Louisville to Islip

Sunday is one of the best days to book for cheap flights from Louisville to Islip: 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 Louisville to Islip

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 Louisville to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $94 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 Louisville to Islip 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 Louisville to Islip 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 Louisville Intl. Airport (SDF) to MacArthur Airport (ISP) cost?
Lock in a cheap one-way flight from $94 or cheap return flight from $203 from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP)?
December is the least expensive month to fly from SDF to ISP. Traveling outside of peak seasons is often the key to scoring lower fares.
What is the cheapest airline that flies from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP)?
To find the cheapest airline flying from SDF to ISP, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP)?
You'll have to book a flight with a layover if you're traveling from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from SDF to ISP?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP)?
Choose a flight from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**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.
What airports do you fly into for Islip from Louisville Intl. Airport (SDF)?
Compare your flight options from Louisville Intl. Airport (SDF) to LaGuardia Airport (LGA). This is the only airport in Islip you can land at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP) last-minute?
Last-minute fares from SDF to ISP are usually more expensive. For the lowest rates, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, you may land a cheap ticket just before your departure.
Is it cheaper to book a SDF to ISP flight and hotel package?
You can save money by securing a SDF to ISP flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal accommodations and flights, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Louisville Intl. Airport (SDF) to MacArthur Airport (ISP)?
In most cases, you can reschedule or cancel your SDF to ISP flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further information, head to our Customer Service portal.

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*Available to One Key members.