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

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

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Alternative airports near Baltimore

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $489
BWI
Baltimore Washington Intl. Thurgood Marshall
CheapestClosest
Average driving time to city center16 min
Flights from $489

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN) cost?
Secure a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN) 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 Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN)?
Traveling in may help you find better deals, as it's the cheapest month for flights between STL and MTN. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from STL to MTN. Then, sort your results by "Price (lowest to highest)" to snag a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN)?
You'll need to book a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from STL to MTN?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can change based on the airline, season 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 Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN) route, aim to travel before 3 PM. Departures after this time have a 22% higher chance of being 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.
What airports do you fly into for Middle River from Lambert-St. Louis Intl. Airport (STL)?
Catch a direct flight from Lambert-St. Louis Intl. Airport (STL) to Middle River and touch down at Ronald Reagan Washington National Airport (DCA). An alternative arrival point to the city is Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN) last-minute?
Last-minute bookings from STL to MTN are generally more expensive. For the best prices, start searching for flights as early as possible. That said, if you can play around with your travel dates, it's possible to score a cheap fare right before your journey.
Is it cheaper to book a STL to MTN flight and hotel package?
You'll typically save money by booking a STL to MTN 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 place. Once you've selected your preferred flights and accommodations, consider adding extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Martin State Airport (MTN)?
In most instances, you can modify or cancel your STL to MTN flight. However, there may be additional fees, 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'd like more details, go to our Customer Service portal.

Travel information

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

Book with confidence

St. Louis to Baltimore Flights

The cheapest times to fly from St. Louis to Baltimore

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

 

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

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

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

 

St. Louis to Baltimore Flights

Explore a world of travel with Expedia

*Available to One Key members.