Are there direct flights from DEN to SAN?

Yes — weekly open route data lists a nonstop corridor from DEN to SAN.

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Open-data sketch · Verify independently · Baseline July 2026

Nonstop checker

Direct nonstop flight: Denver (DEN) → San Diego (SAN)

Instant answer from weekly open route data — not live airline inventory.

Open route data (weekly)

YES — NONSTOP IN OPEN DATA

Weekly open route snapshot lists scheduled nonstop service: Alaska Airlines, Frontier Airlines, Southwest Airlines, United Airlines.

Carriers: Alaska Airlines, Frontier Airlines, Southwest Airlines, United Airlines

OriginDestination

Open route data (weekly)

YES — NONSTOP IN OPEN DATA

Weekly open route snapshot lists scheduled nonstop service: Alaska Airlines, Frontier Airlines, Southwest Airlines, United Airlines.

Carriers in open data (4)

Weekly open route data snapshot — not live airline inventory. Always verify with the carrier before booking.