Southwest Airlines and United Airlines operate nonstop flights from Tucson (TUS) to Denver (DEN). The nonstop flight takes around ~1h 17m, covering 639 miles (1,029 km). Updated 28 June 2026.
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Yes, Southwest Airlines and United Airlines operate nonstop flights from Tucson (TUS) to Denver (DEN).
Southwest Airlines, United Airlines operate nonstop flights from Tucson to Denver.
The nonstop flight from Tucson to Denver takes ~1h 17m (approximately 1029 km).