Cheap Flights from Washington (IAD) to Marathon (MTH)

Popular airlines from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Get a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) 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 Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)?
Traveling in is a great way to save, as it's the cheapest month for flights between IAD and MTH. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)?
To find the cheapest airline that'll fly you from IAD to MTH, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)?
Direct flights from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to MTH?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a range of factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)?
Opt for a flight from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time 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.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Booking your plane ticket from IAD to MTH right before your getaway is generally more expensive. But if you're flexible with your travel dates and times, you could score a cheap last-minute fare.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Marathon, FL (MTH-Florida Keys Marathon)?
In most instances, you can modify or cancel your IAD to MTH flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Florida Keys Marathon
Distance
1005 mi

Book with confidence

Washington to Marathon Flights

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

 

The best time to book a flight from Washington to Marathon

Sunday is one of the best days to book for cheap flights from Washington 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 Washington 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 Washington 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 Washington 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 Washington 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.

 

Washington to Marathon Flights

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*Available to One Key members.