Direct (nonstop) flights from Pittsburgh to Saint Louis
1 airline flys nonstop from Pittsburgh Airport (PIT) to Saint Louis Airport (STL). It's 552 miles (889 km), about 1h 45m in the air. Operated by Southwest Airlines.
Southwest Airlines
Route data last updated: May 31, 2026
Airlines with non-stop flights
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Pittsburgh to Saint Louis with one stop · direct emits 102 kg CO₂ per passenger
Looking for the return flight?
STL → PIT: Flights from Saint Louis to PittsburghOther direct flights from Pittsburgh
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from Pittsburgh to Saint Louis?
A nonstop flight from Pittsburgh (PIT) to Saint Louis (STL) takes approximately 1 hours and 45 minutes. The distance is 552 miles (889 km).
Which airlines fly nonstop from Pittsburgh to Saint Louis?
Just Southwest Airlines.
Is there a nonstop flight from Pittsburgh to Saint Louis?
Yes. 1 airline: Southwest Airlines.
How far is Pittsburgh from Saint Louis?
The flight distance from Pittsburgh to Saint Louis is 552 miles (889 km), measured as the great-circle (shortest air) distance.
What type of aircraft flies from Pittsburgh to Saint Louis?
At 1h 45m, this route typically uses narrow-body aircraft — Boeing 737 or Airbus A320. Varies by airline.
What is the carbon footprint of a flight from Pittsburgh to Saint Louis?
Roughly 102 kg CO2 per passenger one-way. That's about the same as driving 510 km.
Is the return flight from Saint Louis to Pittsburgh 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 Pittsburgh 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 Pittsburgh Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.