Direct (nonstop) flights from Saint Louis to Baltimore
1 airline flys nonstop from Saint Louis Airport (STL) to Baltimore Washington International (BWI). It's 738 miles (1,188 km), about 2h in the air. Operated by Southwest Airlines.
Southwest Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Saint Louis to Baltimore with one stop · direct emits 137 kg CO₂ per passenger
Looking for the return flight?
BWI → STL: Flights from Baltimore to Saint LouisOther direct flights from Saint Louis
Direct flights from Baltimore (BWI)
Frequently Asked Questions
How long is the direct flight from Saint Louis to Baltimore?
A nonstop flight from Saint Louis (STL) to Baltimore (BWI) takes approximately 2 hours. The distance is 738 miles (1,188 km).
Which airlines fly nonstop from Saint Louis to Baltimore?
Just Southwest Airlines.
Is there a nonstop flight from Saint Louis to Baltimore?
Yes. 1 airline: Southwest Airlines.
How far is Saint Louis from Baltimore?
The flight distance from Saint Louis to Baltimore is 738 miles (1,188 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as the length of Italy.
What type of aircraft flies from Saint Louis to Baltimore?
At 2h, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Saint Louis to Baltimore?
Roughly 137 kg CO2 per passenger one-way. That's about the same as driving 685 km.
Is the return flight from Baltimore to Saint Louis also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Saint Louis to Baltimore?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Saint Louis Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.