Sit on the Right side of the plane for the best views on flights from Denver to Seattle. While left offers good takeoff views of the Front Range, right side dominates the longer descent into Seattle with views of the Cascades, Mount Rainier, and Puget Sound—the most visually dramatic portion of the flight.

During takeoff from Rocky Mountain Metropolitan Airport (BJC), sit on the Left side for the best views. Left side offers immediate views of the Front Range peaks as you climb northwestward out of Denver. You'll see the Continental Divide and high peaks that dominate the western horizon during the initial climb. Notable sights include: Front Range peaks (Mount Evans, Mount Bierstadt area), South Platte River valley below, Denver metro sprawl to the east, Continental Divide ridgeline.

When landing at Boeing Fld King Co International (BFI), sit on the Right side for the best views. Right side provides excellent views during the descent into Seattle. You'll see the Cascade Range peaks, Mount Rainier if visible, and the Puget Sound waterway as you approach from the southeast. Notable sights include: Mount Rainier (if clear), Cascade Range peaks, Puget Sound and its islands, Lake Washington.

The flight from Rocky Mountain Metropolitan Airport (BJC) to Boeing Fld King Co International (BFI) takes Approximately 2 hours 45 minutes to 3 hours.

The flight path crosses the high plains of Wyoming and enters the Columbia Basin. Notable features include the Bighorn Mountains (visible to the north around the 1-hour mark), the Snake River Plain and its canyons, and the Blue Mountains of Oregon. The transition from high desert to the Cascade foothills occurs roughly 30 minutes before landing. Weather permitting, you may see the Wallowa Mountains in northeastern Oregon and the Cascade volcanic peaks (Mount Hood, Mount Jefferson) as you approach Washington airspace.