Cheap Flights from Islip (ISP) to Marathon (MTH)

Popular airlines from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon)

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Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Grab a cheap one-way flight or cheap return flight from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon)?
is the cheapest month to fly from ISP to MTH. Traveling during quieter months is often the key to landing a great deal.
What is the cheapest airline that flies from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll fly you from ISP to MTH. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon)?
You'll have to catch a flight with a layover if you're traveling from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from ISP to MTH?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*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 Marathon, FL (MTH-Florida Keys Marathon)?
To land at Marathon, FL (MTH-Florida Keys Marathon) on time, pick 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 Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Booking your ticket from ISP to MTH right before your trip is typically more expensive. However, if you're flexible with your travel times and dates, you could bag a cheap last-minute fare.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Marathon, FL (MTH-Florida Keys Marathon)?
You can usually cancel or reschedule your ISP to MTH flight. However, if it's been more than 24 hours since booking, additional fees 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.

Travel information

Origin airport
MacArthur
Destination airport
Florida Keys Marathon
Distance
1200 mi

Book with confidence

Islip to Marathon Flights

The cheapest times to fly from Islip to Marathon

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

 

The best time to book a flight from Islip to Marathon

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

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 Marathon in 2026. You can also book with separate airlines for your outbound and return journeys, from 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 Marathon 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 Marathon 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.

 

Islip to Marathon Flights

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*Available to One Key members.