Sit on the Left side of the plane for the best views on flights from Tucson to Denver. The left side wins both ends of this flight. Departing Tucson you get the Santa Catalinas and Sonoran Desert landscape, and arriving into Denver you get the full Front Range panorama. The left side also tracks closer to the Colorado Rockies during the mid-flight segment over New Mexico and southern Colorado.

During takeoff from Tucson International (TUS), sit on the Left side for the best views. TUS typically departs northbound on runway 11L/29R or uses runway 11R. Climbing out heading north or northeast, the left (west) side gives you a clear view of the Santa Catalina Mountains rising dramatically to over 9,000 feet just northeast of Tucson, with Mount Lemmon as the dominant peak. The Rincon Mountains are also visible to the southeast on the left side during a northward climb. Notable sights include: Santa Catalina Mountains (Mount Lemmon at 9,157 ft), Rincon Mountains to the southeast, downtown Tucson grid and University of Arizona campus, Saguaro National Park East unit on the bajada slopes.

When landing at Denver International (DEN), sit on the Left side for the best views. DEN's primary arrival from the south typically uses runways oriented north-south (runway 35L/35R or 17L/17R). On a southerly approach heading north, the left (west) side gives a spectacular view of the entire Front Range — from Pikes Peak in the south through the Denver metro foothills to Longs Peak in the north. The Rocky Mountain front wall is one of the most dramatic aerial sights in the continental US. Notable sights include: Front Range of the Rockies (Pikes Peak, Mount Evans, Longs Peak), Denver metro skyline against the plains, Cherry Creek Reservoir, Rocky Mountain National Park peaks on the distant horizon.

The flight from Tucson International (TUS) to Denver International (DEN) takes Approximately 1 hour 45 minutes to 2 hours.

The flight crosses the Rio Grande valley and Albuquerque basin in New Mexico, with the Sandia Mountains (10,678 ft) visible to the east of Albuquerque. Further north the route crosses the San Juan Mountains of southern Colorado — a broad, heavily glaciated range with peaks above 14,000 feet. The Sangre de Cristo Mountains run along the eastern edge of the Colorado Rockies and are visible to the left side throughout the New Mexico and southern Colorado segment. The landscape transitions from Sonoran Desert scrub to high desert grassland to subalpine terrain.