The observed direct connection between Baltimore/Washington International Thurgood Marshall Airport (BWI) and St. Louis Lambert International Airport (STL) covers approximately 736 mi. The estimated flight time is around 2h. Southwest Airlines and Sun Country Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
How far is Baltimore from St. Louis by air?
The great-circle distance between Baltimore/Washington International Thurgood Marshall Airport and St. Louis Lambert International Airport is approximately 736 mi.
How long is the flight from Baltimore to St. Louis?
Based on the distance, the estimated flight time is about 2h. This is an estimate, not a schedule.
Is there a direct connection from Baltimore to St. Louis?
Yes, a direct connection between BWI and STL has been observed in our route data.
Which airlines have been observed on this route?
In the available route data: Southwest Airlines and Sun Country Airlines.
How often is there a flight from Baltimore to St. Louis?
On average around 3.5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,158 observed flights. Mainly Southwest Airlines, Sun Country Airlines. That is an observation, not a timetable.
What is the current time difference between Baltimore and St. Louis?
St. Louis is currently 1 hour behind Baltimore.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
BaltimoreBaltimore/Washington International Thurgood Marshall Airport
