Find Cheap Flights from St. Louis to Baltimore (STL - WAS)

Flights overview

Useful information for finding cheap flights from St. Louis to Baltimore and booking your next trip

Cheapest round-trip flights	$180	Frontier 1 stop 10 hr Thu, May 28 — Sun, May 31	The cheapest round-trip flight from St. Louis to Baltimore is currently $180
Cheapest one-way flight	$90	Frontier 1 stop 5 hr Wed, May 27	The cheapest one-way flight from St. Louis to Baltimore is currently $90
Cheapest nonstop flights	$265	Southwest Nonstop 2 hr Thu, Jun 4 — Mon, Jun 8	The cheapest nonstop round-trip flight from St. Louis to Baltimore is currently $265
Last-minute weekend getaway	$232	Frontier 1 stop 5 hr Sat, May 9 — Sun, May 10	The cheapest last-minute weekend getaway from St. Louis to Baltimore is currently $232
Cheapest business class flights	$418	Frontier 1 stop 5 hr Sat, May 30 — Sun, May 31	The cheapest business class round-trip flight from St. Louis to Baltimore is currently $418

Fastest flight	1 hr 55 min	The fastest nonstop flight from St. Louis to Baltimore takes 1 hr 55 min
Nonstop flights	Every day	There are direct flights on this route every day.

When is the cheapest time to fly?

The cheapest month to fly from St. Louis to Baltimore is typically September. The most expensive month to fly is typically March.

September Cheapest	Typical prices: $140–215
March Most expensive	Typical prices: $240–340

Popular airlines from St. Louis to Baltimore

Southwest

Nonstop

from $265

Typical price: $240–450

52 weekly nonstop flights

STL - BWI, DCA Every day

1822 weekly connecting flights

STL - BWI, DCA, IAD Every day
United

Nonstop

from $275

Typical price: $245–490

14 weekly nonstop flights

STL - IAD Every day

1254 weekly connecting flights

STL - BWI, DCA, IAD Every day
American

Nonstop

from $265

Typical price: $230–460

18 weekly nonstop flights

STL - DCA Every day

842 weekly connecting flights

STL - BWI, DCA, IAD Every day
Delta

from $285

Typical price: $245–560

955 weekly connecting flights

STL - BWI, DCA, IAD Every day
Frontier

from $180

Typical price: $175–440

57 weekly connecting flights

STL - BWI, DCA, IAD Every day
Alaska

from $947

Typical price: $610–1,500

49 weekly connecting flights

STL - BWI, DCA, IAD Every day

Popular airports near St. Louis

St. Louis Lambert International Airport (STL)

St. Louis United States 21 min 12 mi
General Wayne A. Downing Peoria International Airport (PIA)

Peoria United States 2 hr 36 min 143 mi
Columbia Regional Airport (COU)

Columbia United States 2 hr 8 min 109 mi
Indianapolis International Airport (IND)

Indianapolis United States 3 hr 30 min 222 mi

Popular airports near Baltimore

Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI)

Baltimore United States 19 min 8 mi
Dulles International Airport (IAD)

Washington United States 1 hr 23 min 51 mi
Ronald Reagan Washington National Airport (DCA)

Washington United States 59 min 38 mi
Philadelphia International Airport (PHL)

Philadelphia United States 1 hr 35 min 83 mi

Frequently asked questions about flying from St. Louis to Baltimore

The cheapest flights from St. Louis to Baltimore are usually in September. Typical ticket prices in September range from $140 to $215.

The cheapest round-trip flight from St. Louis to Baltimore recently found on Google Flights was with Frontier from $180. The cheapest one-way flight was with Frontier from $90.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from St. Louis to Baltimore is $265, flying from Jun 4 to Jun 8.
The cheapest United flight from St. Louis to Baltimore is $275, flying from May 28 to Jun 1.
The cheapest American flight from St. Louis to Baltimore is $265, flying from May 28 to Jun 1.
The cheapest Delta flight from St. Louis to Baltimore is $285, flying from Jun 4 to Jun 8.
The cheapest Frontier flight from St. Louis to Baltimore is $180, flying from May 28 to May 31.
The cheapest Alaska flight from St. Louis to Baltimore is $947, flying from Jun 6 to Jun 8.

The cheapest round-trip flight from St. Louis to Baltimore starts at $180 from Thu, May 28 to Sun, May 31. The cheapest one-way flight starts at $90 and departs on Wed, May 27.

1 hr 55 min is the shortest flight time from St. Louis to Baltimore.

Baltimore has a 4-season climate with warm, humid summers (Jun–Sep) and some snow in winter (Dec–Feb). Most people choose to visit May–Sep. Artscape (Jul) is a 3-day major annual festival, with performing arts, free concerts and exhibitions. Free Fall (Oct) features a monthlong program of admission-free cultural events.

It's easy to use Google Flights to find the cheapest days to fly from St. Louis to Baltimore.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.

What counts as the best airline for your flights from St. Louis to Baltimore really depends on your individual needs. You may have a favorite carrier or a loyalty program you like, but price, convenience, and airports served also come into play. Flexibility and booking terms – Can you change flights if you want to stay longer or get a refund if you have to postpone your trip? – are also factors that help determine which airline is best to fly from St. Louis to Baltimore.

In terms of nonstop flights, Southwest is the most popular. Southwest offers 52 nonstop flights and 1,822 connecting flights per week. Southwest flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .

Other popular airlines flying from St. Louis to Baltimore are:

United offers 14 nonstop flights and 1,254 connecting flights per week. United flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
American offers 18 nonstop flights and 842 connecting flights per week. American flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
Delta offers 955 connecting flights per week. Delta flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
Frontier offers 57 connecting flights per week. Frontier flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .
Alaska offers 49 connecting flights per week. Alaska flies from St. Louis Lambert International Airport (STL) to Baltimore/Washington International Thurgood Marshall Airport (BWI) (BWI) , Ronald Reagan Washington National Airport (DCA) , Dulles International Airport (IAD) .

The number of connecting flights refers to distinct flights with at least one stop between St. Louis and Baltimore.

The cheapest round-trip flight from St. Louis to Baltimore recently found on Google Flights was with Frontier from $180. The cheapest one-way flight was with Frontier from $90.

Some of the cheapest round-trip deals we found with different airlines:

The cheapest Southwest flight from St. Louis to Baltimore is $265, flying from Jun 4 to Jun 8.
The cheapest United flight from St. Louis to Baltimore is $275, flying from May 28 to Jun 1.
The cheapest American flight from St. Louis to Baltimore is $265, flying from May 28 to Jun 1.
The cheapest Delta flight from St. Louis to Baltimore is $285, flying from Jun 4 to Jun 8.
The cheapest Frontier flight from St. Louis to Baltimore is $180, flying from May 28 to May 31.
The cheapest Alaska flight from St. Louis to Baltimore is $947, flying from Jun 6 to Jun 8.

Southwest, American and United fly direct from St. Louis to Baltimore.

There are 52 Southwest direct flights from St. Louis to Baltimore per week. Flights are available every day.
There are 14 United direct flights from St. Louis to Baltimore per week. Flights are available every day.
There are 18 American direct flights from St. Louis to Baltimore per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

The cheapest last-minute deal between St. Louis and Baltimore at price $232 is offered by Frontier from Sat, May 9 to Sun, May 10.

Southwest, American and United fly direct from St. Louis to Baltimore.

There are 52 Southwest direct flights from St. Louis to Baltimore per week. Flights are available every day.
There are 14 United direct flights from St. Louis to Baltimore per week. Flights are available every day.
There are 18 American direct flights from St. Louis to Baltimore per week. Flights are available every day.

Use the Stops filter while searching for flights, to see only nonstop options in your results.

There are direct flights from St. Louis to Baltimore on a daily basis.

The cheapest direct (nonstop) round-trip flights between St. Louis and Baltimore start at $265 from Thu, Jun 4 to Mon, Jun 8 with Southwest.

It's easy to find nonstop flights with Google Flights! Once you've searched for flights from St. Louis to Baltimore, just select the nonstop flights only option in the 'Stops’ filter in the search form and view all available direct flights and their prices.

The cheapest business class round-trip flights between St. Louis and Baltimore start at $418 from Sat, May 30 to Sun, May 31 with Frontier.

The cheapest economy class round-trip flights between St. Louis and Baltimore start at $180 from Thu, May 28 to Sun, May 31.

To book business class trips from St. Louis to Baltimore, look for the default Economy selection at the top, and change it to your desired cabin class such as Premium Economy, Business Class, or First Class. You can then select your departure and arrival dates, consider available options, and book your business travel.

You can also adjust the trip type to view one-way fares.

The best last-minute getaway deal for the next weekend between St. Louis and Baltimore starts at $232 from Sat, May 9 to Sun, May 10 with Frontier.

The cheapest last-minute deal between St. Louis and Baltimore at price $232 is offered by Frontier from Sat, May 9 to Sun, May 10.

To find last-minute flight deals from St. Louis to Baltimore, start by entering the city names, select the desired departure and return dates, and hit the Search button to view flight options.

You can check for last-minute flights for the same day or adjust the trip type to see one-way fares.