Sit on the Left side of the plane for the best views on flights from Denver to San Juan. The Rocky Mountain Front Range view on departure from Denver on the left side is one of the most spectacular urban-to-mountain panoramas in North American aviation and outweighs the landing view. Left side also tracks the Gulf of Mexico coastline and Caribbean approach reasonably well mid-flight.

During takeoff from Denver International (DEN), sit on the Left side for the best views. DEN typically departs east or southeast on runways 16/17, then turns south toward the route. The left side faces west, giving a clear view of the entire Front Range of the Rocky Mountains including Pikes Peak and the Denver metro sprawl below. This is the money shot leaving Denver. Notable sights include: Front Range Rocky Mountains, Pikes Peak (south), Denver downtown skyline, Cherry Creek Reservoir.

When landing at Fernando Luis Ribas Dominicci (SIG), sit on the Left side for the best views. SIG (Isla Grande Airport) sits on the northern shore of San Juan, and aircraft typically approach from the east or northeast over the Atlantic. The left side faces north over open Atlantic water, but the right side faces south toward the San Juan lagoon and city. Actually on final into SIG from the east, the left side looks over the Atlantic and the right looks over San Juan Bay and Old San Juan — right is better. Correcting: Right wins for landing. Notable sights include: Old San Juan peninsula, San Juan Bay, Condado lagoon, El Morro fortress.

The flight from Denver International (DEN) to Fernando Luis Ribas Dominicci (SIG) takes Approximately 4 hours 45 minutes to 5 hours 15 minutes.

The route crosses the Texas Hill Country and San Antonio area, then the Gulf of Mexico coast near Corpus Christi or Brownsville, followed by a long overwater leg across the Gulf of Mexico and the Caribbean Sea, passing north of Cuba before reaching Puerto Rico. The Yucatan Peninsula may be visible distantly to the southwest on clear days during the Gulf crossing.