American Airlines, Frontier Airlines, Southwest Airlines and United Airlines operate nonstop flights from Philadelphia (PHL) to Denver (DEN). The nonstop flight takes around ~3h 8m, covering 1,553 miles (2,500 km). Updated 28 June 2026.
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Yes, American Airlines, Frontier Airlines and 2 more airlines operate nonstop flights from Philadelphia (PHL) to Denver (DEN).
American Airlines, Frontier Airlines, Southwest Airlines, United Airlines operate nonstop flights from Philadelphia to Denver.
The nonstop flight from Philadelphia to Denver takes ~3h 8m (approximately 2500 km).