$57 Find Cheap Flights from St. Louis to Baltimore - Compare and Save

Among airlines operating St. Louis to Baltimore flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between St. Louis and Baltimore.

Flights from St. Louis to Baltimore usually depart from Lambert-St Louis (STL) and arrive at Baltimore/Washington (BWI).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Three cabin classes are available on flights from St. Louis to Baltimore:

• Economy Class
• Business Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $252 round-trip via Orlando (MCO), compared to $443 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

One-stop flights from St. Louis to Baltimore most commonly connect through:

• Charlotte Douglas (CLT) - 40% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 33% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 10% of one-stop connections
• Orlando (MCO) - 10% of one-stop connections

Charlotte Douglas (CLT) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 26% on the St. Louis to Baltimore route. Thursday is the cheapest departure day at $370 round-trip on average, while Sunday is the most expensive at $496, a difference of $126. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on St. Louis to Baltimore flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 0%.

Some of the most popular sights in Baltimore are Inner Harbor, M&T Bank Stadium and Oriole Park At Camden Yards. These are among the most viewed places in Baltimore on KAYAK.

These are the earliest and latest flight times available from St. Louis to Baltimore:

• Earliest: departs at 5:10 am and lands at 7:09 am
• Latest: departs at 9:20 pm and lands at 11:19 pm.

The flight takes about 1h 59m.

Last-minute fares on this route - booked within 2 weeks of departure - run 38% above the route average of $404. Book 12 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to Baltimore takes 1h 59m, covering 736 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

One-way fares from St. Louis to Baltimore are currently lower than usual. Average one-way flight prices are about $111, which is 55% below the typical average for this route.

Flying via Chicago Midway (MDW) gives the shortest average 1-stop total travel time at 4h 24m, compared with 4h 30m via Detroit Metropolitan Wayne County (DTW) and 4h 36m via Charlotte Douglas (CLT).

Baltimore is 1 hour ahead of St. Louis (Eastern Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Baltimore/Washington Airport (BWI) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include:
• NextCar
• Hertz
• Dollar
• Thrifty
• Budget

Round-trip flights from St. Louis to Baltimore range from $334 to $504, with an average of $404 over the past 12 months. Anything below $334 counts as a good deal.