Cheap Flights from Denver (DEN) to Marathon (MTH)

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

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Flights from Denver (DEN) to Marathon (MTH)
Origin airport
Denver Intl.
Destination airport
Florida Keys Marathon
Distance
1721 mi

Denver to Marathon Flights

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

 

The best time to book a flight from Denver to Marathon

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

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Discover the latest flight deals from DEN to MTH by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from DEN to MTH?
The cheapest flights from DEN to MTH are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from DEN to MTH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from DEN to MTH. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Denver Intl. Airport (DEN) to Marathon, FL (MTH-Florida Keys Marathon)?
Nonstop flights from Denver Intl. Airport (DEN) 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 dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DEN to MTH?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the season, carrier 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 Denver Intl. Airport (DEN) to Marathon, FL (MTH-Florida Keys Marathon)?
To arrive at Marathon, FL (MTH-Florida Keys Marathon) on time, choose a flight that leaves Denver Intl. Airport (DEN) 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 Denver Intl. Airport (DEN) to Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Last-minute bookings from DEN to MTH are generally more expensive. For the cheapest rates, start looking for flights early. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before your journey.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Marathon, FL (MTH-Florida Keys Marathon)?
If you booked your DEN to MTH flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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*Available to One Key members.