Cheap Flights from Baltimore (MTN) to St. Louis (STL)

Popular airlines from Baltimore, MD (MTN-Martin State) to St. Louis Lambert Intl. Airport (STL)

Frequently asked questions

How much does a flight from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL) cost?
Lock in a cheap one-way flight or cheap return flight from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL) 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 Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for may help you find better deals, as it's the cheapest month for flights between MTN and STL. You'll often find the lowest fares during the off-season.
Which airlines fly direct from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
While Baltimore, MD (MTN-Martin State) has no direct flights to Lambert-St. Louis Intl. Airport (STL), other airports have nonstop options. Jetting off from Ronald Reagan Washington National Airport (DCA) will get you to St. Louis without any detours.
What is the cheapest airline that flies from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest MTN to STL flight.
How many flights per day from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from MTN to STL?
Usually you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary based on the time of year, 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 Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL) route, travel before 3 PM. Departures after this time have a 22% higher chance of cancellation.**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 Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your trip to book a flight from MTN to STL often results in higher prices. While you may come across some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary for a better chance of getting a bargain.
Is it cheaper to book a MTN to STL flight and hotel package?
You can save money by securing a MTN to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After selecting your ideal flights and accommodations, you can add extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Martin State Airport (MTN) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can reschedule or cancel your MTN to STL flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like further details, go to our Customer Service portal.

Travel information

Travel information

Origin airport
Martin State
Destination airport
Lambert-St. Louis Intl.
Distance
748 mi

Book with confidence

Book with confidence

Baltimore to St. Louis Flights

The cheapest times to fly from Baltimore to St. Louis

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

 

The best time to book a flight from Baltimore to St. Louis

Sunday is one of the best days to book for cheap flights from Baltimore to St. Louis: 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 Baltimore to St. Louis

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 Baltimore to St. Louis 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 Baltimore to St. Louis 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 Baltimore to St. Louis 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.

 

Baltimore to St. Louis Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.