Direct (nonstop) flights from Boston to Saint Louis
2 airlines fly nonstop from Boston Logan International Airport (BOS) to Saint Louis Airport (STL). It's 1,046 miles (1,684 km), about 3h 10m in the air. Operated by American Airlines, Southwest Airlines.
American Airlines
Southwest Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
AA
American Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Boston to Saint Louis with one stop · direct emits 177 kg CO₂ per passenger
Looking for the return flight?
STL → BOS: Flights from Saint Louis to BostonOther direct flights from Boston
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Boston to Saint Louis?
A nonstop flight from Boston (BOS) to Saint Louis (STL) takes approximately 3 hours and 10 minutes. The distance is 1,046 miles (1,684 km).
Which airlines fly nonstop from Boston to Saint Louis?
2 airlines: American Airlines, Southwest Airlines.
Is there a nonstop flight from Boston to Saint Louis?
Yes. 2 airlines: American Airlines, Southwest Airlines.
How far is Boston from Saint Louis?
The flight distance from Boston to Saint Louis is 1,046 miles (1,684 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Miami.
What type of aircraft flies from Boston to Saint Louis?
At 3h 10m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Boston to Saint Louis?
Roughly 177 kg CO2 per passenger one-way. That's about the same as driving 885 km.
Is the return flight from Saint Louis to Boston 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 Boston to Saint Louis?
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 Boston Logan International Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.