Direct (nonstop) flights from San Antonio to Denver
3 airlines fly nonstop from San Antonio International (SAT) to Denver International (DEN). It's 793 miles (1,277 km), about 2h 16m in the air. Operated by Frontier Airlines, United Airlines, Southwest Airlines.
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 28, 2026
Airlines with non-stop flights
F9
Frontier Airlines
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from San Antonio to Denver with one stop · direct emits 147 kg CO₂ per passenger
Looking for the return flight?
DEN → SAT: Flights from Denver to San AntonioOther direct flights from San Antonio
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from San Antonio to Denver?
A nonstop flight from San Antonio (SAT) to Denver (DEN) takes approximately 2 hours and 16 minutes. The distance is 793 miles (1,277 km).
Which airlines fly nonstop from San Antonio to Denver?
3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from San Antonio to Denver?
Yes. 3 airlines: Frontier Airlines, United Airlines, Southwest Airlines.
How far is San Antonio from Denver?
The flight distance from San Antonio to Denver is 793 miles (1,277 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 San Antonio to Denver?
At 2h 16m, 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 Antonio to Denver?
Roughly 147 kg CO2 per passenger one-way. That's about the same as driving 735 km.
Is the return flight from Denver to San Antonio 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 Antonio to Denver?
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 Antonio International for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.