Sit on the Left side of the plane for the best views on flights from Seattle to Cincinnati. Left side wins at both ends of the flight. At departure you get Mount Rainier and the Cascades; at arrival you get the Ohio River and Cincinnati skyline. During cruise the flight tracks roughly east-southeast across Idaho, Wyoming, and the northern Rockies, then across the Great Plains and into the Midwest — the left side faces north and offers slightly better angles on the Rocky Mountain terrain crossing over southern Idaho and Wyoming, though at 35,000 feet both sides see similar high-altitude plains scenery.

During takeoff from Seattle Tacoma International (SEA), sit on the Left side for the best views. SEA primarily uses runways 16L/16R for southbound departures, meaning the aircraft heads south and then turns east. The left side faces east toward the Cascade Range, giving you a direct view of Mount Rainier dominating the skyline. As the plane climbs and banks eastward, the left side also captures Lake Washington and the Seattle skyline receding behind you. Notable sights include: Mount Rainier (14,411 ft, unmistakable snow cone to the southeast), Lake Washington (large urban lake east of Seattle), the Seattle downtown skyline to the north, and the Green River valley below.

When landing at Cincinnati Northern Kentucky International (CVG), sit on the Left side for the best views. CVG primarily uses runways 18L/18R or 36R/36L depending on wind, but the most common approach is from the north heading south (runway 18). On a southbound approach, the left side faces east toward the Ohio River and the Cincinnati skyline, which sits just across the river in Ohio. The left seat gives you the best view of the Ohio River bends and the dense urban core of Cincinnati. Notable sights include: Ohio River (wide, winding river forming the Kentucky-Ohio border), Cincinnati downtown skyline (visible across the river to the northeast), the Kentucky hills and suburban sprawl of Northern Kentucky below, and the broad river bends near Covington and Newport.

The flight from Seattle Tacoma International (SEA) to Cincinnati Northern Kentucky International (CVG) takes Approximately 4 hours 15 minutes to 4 hours 45 minutes.

The flight crosses the Cascade Range over central Washington, then the Columbia Plateau of eastern Washington and Oregon, the Snake River Plain of southern Idaho, the Rocky Mountains over southern Wyoming (including the Wind River Range visible to the north), the high plains of Colorado and Nebraska, the Missouri River valley, and the rolling farmland of Indiana before descending into the Ohio River valley at Cincinnati