Southwest Airlines and United Airlines operate nonstop flights from Buffalo (BUF) to Denver (DEN). The nonstop flight takes around ~2h 44m, covering 1,356 miles (2,182 km). Updated 28 June 2026.
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Yes, Southwest Airlines and United Airlines operate nonstop flights from Buffalo (BUF) to Denver (DEN).
Southwest Airlines, United Airlines operate nonstop flights from Buffalo to Denver.
The nonstop flight from Buffalo to Denver takes ~2h 44m (approximately 2182 km).