St. Louis Lambert International Airport
St. Louis, United StatesSTL / KSTL
Major airport · 88 direct destinations · 4 runways · longest runway 11,020 ft
57 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Route
St. Louis → Baltimore
STL
St. LouisSt. Louis Lambert International Airport
St. LouisSt. Louis Lambert International AirportBWIBaltimoreBaltimore/Washington International Thurgood Marshall Airport
BaltimoreBaltimore/Washington International Thurgood Marshall Airport- Distance
- 736 mi
- Estimated flight time
- ~2h
Baltimore is currently 1 hour ahead of St. Louis.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 3 flights a day, observed from October 2025 to September 2026.
- 3
- flights per day
- 5
- busiest month · Jul
- 2
- quietest month · Jan
- 1 hr 35 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 3Mar
- 3Apr
- 3May
- 4.5Jun
- 5Jul
- 3Aug
- 3Sep
- 3Oct2025
- 4Nov
- 4Dec
Airlines
Who flies it
Southwest Airlinesall year
Sun Country Airlinessummer
Through the day
Departure times
Local time in St. Louis. Most departures between 05:00 and 08:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 3.8Mon
- 3.4Tue
- 3.2Wed
- 3.3Thu
- 3.5Fri
- 3.3Sat
- 3.1Sun
Fleet
Aircraft observed
- Boeing 737-700B73734%
- Boeing 737-800B73834%
- Boeing 737 MAX 8B38M31%
- Bombardier Challenger 350CL350%
- Embraer Phenom 300E55P0%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 72 |
|
| February 2026 | 2 | 67 |
|
| March 2026 | 3 | 95 |
|
| April 2026 | 3 | 95 |
|
| May 2026 | 3 | 95 |
|
| June 2026 | 4.5 | 133 |
|
| July 2026 | 5 | 137 |
|
| August 2026 | 3 | 109 |
|
| September 2026 | 3 | 102 |
|
| October 2025 | 3 | 95 |
|
| November 2025 | 4 | 117 |
|
| December 2025 | 4 | 95 |
|
Airlines observed on this route
From observed callsign routes on STL-BWI - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from St. Louis: 88.
- Direct destinations observed from Baltimore: 104.
The airports on this route
Baltimore/Washington International Thurgood Marshall Airport
Baltimore, United StatesBWI / KBWI
Major airport · 104 direct destinations · 3 runways · longest runway 10,502 ft
75 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from St. Louis to Baltimore
The observed direct connection between St. Louis Lambert International Airport (STL) and Baltimore/Washington International Thurgood Marshall Airport (BWI) 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 St. Louis from Baltimore by air?
- The great-circle distance between St. Louis Lambert International Airport and Baltimore/Washington International Thurgood Marshall Airport is approximately 736 mi.
- How long is the flight from St. Louis to Baltimore?
- Based on the distance, the estimated flight time is about 2h. This is an estimate, not a schedule.
- Is there a direct connection from St. Louis to Baltimore?
- Yes, a direct connection between STL and BWI 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 St. Louis to Baltimore?
- On average around 3 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 1,212 observed flights. Mainly Southwest Airlines, Sun Country Airlines. That is an observation, not a timetable.
- What is the current time difference between St. Louis and Baltimore?
- Baltimore is currently 1 hour ahead of St. Louis.
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.
Route data updated on October 11, 2026.