$65 Find Cheap Flights from St. Louis to Baltimore - Compare and Save

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

• Earliest: departs at 5:00 am and lands at 6:57 am
• Latest: departs at 9:20 pm and lands at 11:17 pm.

The flight takes about 1h 57m.

Only Economy Class is available on flights from St. Louis to Baltimore.

A nonstop flight from St. Louis to Baltimore takes 1h 57m, 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.

Round-trip flights from St. Louis to Baltimore range from $350 to $507, with an average of $425 over the past 12 months. Anything below $350 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 41% above the $425 route average. Book 7 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $262 round-trip via Orlando (MCO), compared to $454 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.

Morning is the busiest departure period on St. Louis to Baltimore flights, with 34% of flights leaving in that window. Afternoon departures account for 33%, evening flights for 33%, and night flights for 0%.

One-way fares from St. Louis to Baltimore are currently lower than usual. Average one-way flight prices are about $126, which is 48% below the typical average for this route.

Baltimore/Washington Airport (BWI) hosts 5 major car rental companies, with daily rates averaging $72 for economy cars. Top options include:

• NextCar
• Hertz
• Dollar
• Budget
• Thrifty

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

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

• Charlotte Douglas (CLT) - 40% of one-stop connections
• Atlanta Hartsfield-Jackson (ATL) - 31% of one-stop connections
• Orlando (MCO) - 11% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 10% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from St. Louis to Baltimore. Tuesday is the cheapest departure day at $375 round-trip on average, while Sunday is the most expensive at $496, a difference of $121.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Only Southwest operates flights between St. Louis and Baltimore.

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 35m 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.

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

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.

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

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