Direct (nonstop) flights from Saint Louis to San Antonio
1 airline flys nonstop from Saint Louis Airport (STL) to San Antonio International (SAT). It's 786 miles (1,265 km), about 2h 20m in the air. Operated by Southwest Airlines.
Southwest Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Saint Louis to San Antonio with one stop · direct emits 145 kg CO₂ per passenger
Looking for the return flight?
SAT → STL: Flights from San Antonio to Saint LouisOther direct flights from Saint Louis
Direct flights from San Antonio (SAT)
Frequently Asked Questions
How long is the direct flight from Saint Louis to San Antonio?
A nonstop flight from Saint Louis (STL) to San Antonio (SAT) takes approximately 2 hours and 20 minutes. The distance is 786 miles (1,265 km).
Which airlines fly nonstop from Saint Louis to San Antonio?
Just Southwest Airlines.
Is there a nonstop flight from Saint Louis to San Antonio?
Yes. 1 airline: Southwest Airlines.
How far is Saint Louis from San Antonio?
The flight distance from Saint Louis to San Antonio is 786 miles (1,265 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as London to Madrid.
What type of aircraft flies from Saint Louis to San Antonio?
At 2h 20m, 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 Saint Louis to San Antonio?
Roughly 145 kg CO2 per passenger one-way. That's about the same as driving 725 km.
Is the return flight from San Antonio 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 San Antonio?
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.