Direct flights from Denver to San Diego DEN → SAN
Frontier Airlines, Southwest Airlines, United Airlines and Alaska Airlines operate nonstop flights from Denver (DEN) to San Diego (SAN). The nonstop flight takes around ~1h 43m, covering 852 miles (1,371 km) and operates multiple daily. Round-trip fares currently start at $89, with a typical fare around $214 across 190 recent fare combinations. Updated 28 June 2026.
60-day flexibility overview based on 190 recent fares across the next 60 days
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Alaska Airlines
AS
Frontier Airlines
F9
Southwest Airlines
WN
United Airlines
UA
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Frequently asked questions
Is there a direct flight from Denver to San Diego?
Yes, Frontier Airlines, Southwest Airlines and 2 more airlines operate nonstop flights from Denver (DEN) to San Diego (SAN).
Which airlines fly direct from Denver to San Diego?
Frontier Airlines, Southwest Airlines, United Airlines, Alaska Airlines operate nonstop flights from Denver to San Diego.
How long is the flight from Denver to San Diego?
The nonstop flight from Denver to San Diego takes ~1h 43m (approximately 1371 km).
How often do direct flights operate from Denver to San Diego?
Nonstop flights from Denver to San Diego operate multiple daily.
How much is a round-trip flight from Denver to San Diego?
Round-trip flights from Denver (DEN) to San Diego (SAN) start at $89, with a typical fare around $214. Based on 190 recent fare combinations.