Direct (nonstop) flights from San Diego to Saint Louis
1 airline flys nonstop from San Diego International Airport (SAN) to Saint Louis Airport (STL). It's 1,557 miles (2,505 km), about 3h 35m in the air. Operated by Southwest Airlines.
Southwest Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
WN
Southwest Airlines
Alternative Routes
Other ways to fly from San Diego to Saint Louis with one stop · direct emits 263 kg CO₂ per passenger
Looking for the return flight?
STL → SAN: Flights from Saint Louis to San DiegoOther direct flights from San Diego
Direct flights from Saint Louis (STL)
Frequently Asked Questions
How long is the direct flight from San Diego to Saint Louis?
A nonstop flight from San Diego (SAN) to Saint Louis (STL) takes approximately 3 hours and 35 minutes. The distance is 1,557 miles (2,505 km).
Which airlines fly nonstop from San Diego to Saint Louis?
Just Southwest Airlines.
Is there a nonstop flight from San Diego to Saint Louis?
Yes. 1 airline: Southwest Airlines.
How far is San Diego from Saint Louis?
The flight distance from San Diego to Saint Louis is 1,557 miles (2,505 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 San Diego to Saint Louis?
At 3h 35m, 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 San Diego to Saint Louis?
Roughly 263 kg CO2 per passenger one-way. That's about the same as driving 1,315 km.
Is the return flight from Saint Louis to San Diego 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 San Diego 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 San Diego International Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.