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

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

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Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) cost?
You can find one-way and return flights from STL to MTH with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when STL to MTH ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
The cheapest months to fly from STL to MTH are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
Enter STL to MTH and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from STL to MTH. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
Select the "Business class" and "First class" filters when looking for STL to MTH flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Marathon, FL (MTH-Florida Keys Marathon) flight within the last 24 hours, you may be able to modify or cancel it without any 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, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Florida Keys Marathon
Distance
1777 km

Book with confidence

St. Louis to Marathon Flights

The easy way to book your flights from St. Louis to Marathon 

With Expedia, it’s simple to find and book flights to Marathon from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Florida Keys Marathon, too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Marathon today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Florida Keys Marathon, MTH 

Sort your search results by price to find great deals on your flight from St. Louis to Marathon—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Marathon from St. Louis currently is just rising to .  

Here are more money-saving tips: 

  • Fly in when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Marathon  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Marathon from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Marathon with Expedia today.

St. Louis to Marathon Flights

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