Direct (nonstop) flights from San Diego to Denver
4 airlines fly nonstop from San Diego International Airport (SAN) to Denver International (DEN). It's 853 miles (1,372 km), about 2h 29m in the air. Operated by Alaska Airlines, Frontier Airlines, United Airlines and others.
Alaska Airlines
Frontier Airlines
United Airlines
Southwest Airlines
Route data last updated: May 30, 2026
Airlines with non-stop flights
AS
Alaska Airlines
F9
Frontier Airlines
UA
United Airlines
WN
Southwest Airlines
Alternative Routes
Other ways to fly from San Diego to Denver with one stop · direct emits 158 kg CO₂ per passenger
Looking for the return flight?
DEN → SAN: Flights from Denver to San DiegoOther direct flights from San Diego
Direct flights from Denver (DEN)
Frequently Asked Questions
How long is the direct flight from San Diego to Denver?
A nonstop flight from San Diego (SAN) to Denver (DEN) takes approximately 2 hours and 29 minutes. The distance is 853 miles (1,372 km).
Which airlines fly nonstop from San Diego to Denver?
4 airlines: Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
Is there a nonstop flight from San Diego to Denver?
Yes. 4 airlines: Alaska Airlines, Frontier Airlines, United Airlines, Southwest Airlines.
How far is San Diego from Denver?
The flight distance from San Diego to Denver is 853 miles (1,372 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 Diego to Denver?
At 2h 29m, 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 Denver?
Roughly 158 kg CO2 per passenger one-way. That's about the same as driving 790 km.
Is the return flight from Denver 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 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 Diego International Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.