Sit on the Left side of the plane for the best views on flights from Dallas-fort Worth to Seattle. Left side misses the Fort Worth view on departure but wins decisively on arrival with Mount Rainier, the Cascades, Lake Washington, and the Seattle skyline. During the cruise over the Rockies and into the Pacific Northwest, the left side also tracks closer to the volcanic peaks of the Cascades on descent. The arrival scenery on the left is among the most dramatic of any major US route.

During takeoff from Dallas Fort Worth International (DFW), sit on the Right side for the best views. DFW typically departs northbound on runways 17L/17R or 18L/18R, meaning a northbound climb-out. Right side gives you a clear view west over Fort Worth's downtown skyline and the sprawling DFW metroplex as you bank northwest. Left side faces east toward Dallas proper but the city recedes quickly behind you. Notable sights include: Fort Worth downtown skyline, Lake Worth to the northwest, Eagle Mountain Lake, the dense suburban grid of the Metroplex fading into open Texas plains.

When landing at Seattle Tacoma International (SEA), sit on the Left side for the best views. SeaTac primarily uses runways 16L/16R for arrivals, meaning aircraft approach from the north heading south. On a left seat you get the eastern approach view showing Mount Rainier dominating the horizon to the southeast, with Puget Sound visible to the right from the right seat. However on the more common ILS approach from the north heading south, the left side faces east directly toward the Cascades and Rainier. Left wins clearly. Notable sights include: Mount Rainier (14,411 ft, unmistakable snow-capped cone to the southeast), Puget Sound and its islands, Lake Washington, Seattle city skyline with Elliott Bay.

The flight from Dallas Fort Worth International (DFW) to Seattle Tacoma International (SEA) takes Approximately 3 hours 45 minutes to 4 hours 15 minutes.

The flight crosses the Texas panhandle's flat plains, then the Sangre de Cristo and Rocky Mountains over New Mexico and Colorado, the high desert of the Colorado Plateau, the Snake River Plain of southern Idaho, and finally the Columbia River basin before climbing over the Cascades into the Seattle basin. On clear days the volcanic peaks of the Cascades — Mount Adams and Mount Rainier — are visible well before descent begins.