Cheap Flights from Marathon (MTH) to Philadelphia (PHL)

Popular airlines from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)

Frequently asked questions

How much does a flight from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL) cost?
Get a cheap one-way flight or cheap return flight from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL) 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 Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
Planning your trip for is a great way to save, as it's the cheapest month for flights between MTH and PHL. You'll typically find the lowest fares during off-peak months.
Which airlines fly direct from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
You can't fly directly from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL). However, there are other airports offering nonstop flights. Start your journey at Key West Intl. Airport (EYW) and travel straight to Philadelphia without layovers.
What is the cheapest airline that flies from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from MTH to PHL. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
Direct flights from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from MTH to PHL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the time of year, airline 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 Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
To avoid potential delays on the Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL) route, travel before 3 PM. Departures after this hour have a 22% higher chance of being 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.
Is it cheaper to buy a plane ticket from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL) last-minute?
Booking your ticket from MTH to PHL just before your journey is typically more expensive. But if you're flexible with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a MTH to PHL flight and hotel package?
You can save money by booking a MTH to PHL 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 it all in one convenient place. Once you've selected your preferred accommodations and flights, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Marathon, FL (MTH-Florida Keys Marathon) to Philadelphia Intl. Airport (PHL)?
In most instances, you can cancel or reschedule your MTH to PHL flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you'd like more details, head to our Customer Service portal.

Travel information

Origin airport
Florida Keys Marathon
Destination airport
Philadelphia Intl.
Distance
1099 mi

Book with confidence

Marathon to Philadelphia Flights

The cheapest times to fly from Marathon to Philadelphia

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

 

The best time to book a flight from Marathon to Philadelphia

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

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 Marathon to Philadelphia 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 Marathon to Philadelphia 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 Marathon to Philadelphia 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.

 

Marathon to Philadelphia Flights

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*Available to One Key members.