Sit on the Right side of the plane for the best views on flights from Seattle to Washington. While left seats dominate the Seattle departure with Cascade/Rainier views, right seats capture the more iconic and historically significant Washington DC arrival over the Potomac and National Mall. The landing view is more memorable and geographically distinctive than the takeoff, making right the better overall choice for this route.

During takeoff from Boeing Fld King Co International (BFI), sit on the Left side for the best views. BFI typically departs runways 13L/R or 16L/R depending on wind. Left seats capture the Cascade Range to the east and Mount Rainier during initial climb, while the flight path takes you southeast over the Puget Sound lowlands. Right seats face west toward the Olympic Mountains and Puget Sound, but the climb-out angle makes the Cascades more dramatic on the left. Notable sights include: Mount Rainier (14,410 ft, visible 50+ miles southeast), Cascade Range spine, Lake Union and Lake Washington (immediate departure area), Puget Sound waters to the west.

When landing at Ronald Reagan Washington National (DCA), sit on the Right side for the best views. DCA uses runways 01/19 depending on wind. Approaching from the west, right-side seats offer superior views of the Potomac River, the National Mall, and central Washington DC landmarks during descent. Left seats see the Virginia suburbs and Dulles corridor but miss the iconic river and downtown core. Notable sights include: Potomac River (distinctive serpentine curve through the city), National Mall and Capitol building area, Arlington and the Potomac's eastern bluffs, Anacostia River confluence.

The flight from Boeing Fld King Co International (BFI) to Ronald Reagan Washington National (DCA) takes Approximately 5 hours 15 minutes.

The flight path crosses the northern Appalachian plateau and ridges of Pennsylvania and West Virginia. Around the midpoint (over central Pennsylvania/West Virginia border), the Appalachian Mountains appear as parallel ridges running northeast-southwest, with valleys between them. The Ohio River valley becomes visible in the latter half of the flight. Scattered cumulus clouds typically develop over the Appalachians by afternoon. The transition from the Pacific Northwest's volcanic peaks to the Appalachian's ancient, rounded ridges is geologically striking but subtle at cruise altitude.