Cheap Flights from St. Louis (STL) to Marathon (MTH)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon)

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Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon) cost?
Discover the latest flight deals from STL 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 STL to MTH?
The cheapest flights from STL 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 STL to MTH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to MTH. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon)?
You’ll need to catch a flight with a layover if you’re traveling from Lambert-St. Louis Intl. Airport (STL) 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 more stops to find the best option for your trip.
What day of the week has the most flights from STL to MTH?
You’ll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon)?
Book a flight from Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon) that takes off before 3 PM to reduce the likelihood of delays. Departures later than this have a 22% higher chance of being canceled, on average.**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 Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon) last-minute?
Booking your ticket from STL to MTH shortly before your journey is generally 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 Lambert-St. Louis Intl. Airport (STL) to Marathon, FL (MTH-Florida Keys Marathon)?
If you booked your STL to MTH flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.
*Available to One Key members.