Cheap Flights from Greenville (GSP) to Marathon (MTH)

Popular airlines from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)

Frequently asked questions

How much does a flight from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Grab a cheap one-way flight or cheap return flight from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon) 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 Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)?
is the most affordable month to fly from GSP to MTH. Avoiding peak travel times is often the key to landing a great deal.
What is the cheapest airline that flies from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)?
To find the cheapest airline flying from GSP to MTH, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)?
There aren't any daily nonstop flights from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from GSP to MTH?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary based on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)?
To reach Marathon, FL (MTH-Florida Keys Marathon) without delays, pick a flight that takes off from Greenville-Spartanburg Intl. Airport (GSP) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Last-minute fares from GSP to MTH are generally more expensive. To secure the lowest prices, start searching for flights well in advance. That being said, if you're flexible with your travel dates, it's possible to score a cheap fare right before your journey.
Can I cancel or change the date of my flight from Greenville-Spartanburg Intl. Airport (GSP) to Marathon, FL (MTH-Florida Keys Marathon)?
If you booked your GSP to MTH flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

Travel information

Origin airport
Greenville-Spartanburg Intl.
Destination airport
Florida Keys Marathon
Distance
705 mi

Book with confidence

Greenville to Marathon Flights

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

 

The best time to book a flight from Greenville to Marathon

Sunday is one of the best days to book for cheap flights from Greenville 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 Greenville 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 Greenville to Marathon in 2025. 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 Greenville 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 Greenville 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.

 

Greenville to Marathon Flights

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*Available to One Key members.