Sit on the Left side of the plane for the best views on flights from Dublin to Seattle. Left side wins both departure and arrival. On departure you get Dublin Bay and the Wicklow Mountains; on arrival you get the Seattle skyline and Mount Rainier. The right side offers little of comparable interest at either end.

During takeoff from Dublin (DUB), sit on the Left side for the best views. Dublin typically departs on runway 28 heading west, then turns northwest. The left (south) side gives you Dublin Bay, the Liffey estuary, and the Wicklow Mountains inland. These are the most visually striking features around Dublin on departure. Notable sights include: Dublin Bay, River Liffey estuary, Wicklow Mountains, Howth Head peninsula.

When landing at Seattle Tacoma International (SEA), sit on the Left side for the best views. SeaTac typically lands on runways 16L/16R heading south, meaning the aircraft approaches from the north over Puget Sound. The left (east) side gives you Mount Rainier dominating the horizon, the Seattle skyline, and Lake Washington. These are far more dramatic than the west side view over the Olympic Peninsula foothills. Notable sights include: Mount Rainier, Seattle city skyline, Lake Washington, Puget Sound.

The flight from Dublin (DUB) to Seattle Tacoma International (SEA) takes Approximately 9 to 10 hours.

The great circle route from Dublin to Seattle tracks northwest over the Scottish Highlands and Hebrides islands, then crosses the North Atlantic near Iceland — Greenland's ice sheet and fjorded coastline may be visible in clear conditions. The route then crosses the southern coast of Baffin Island and Hudson Bay region in northern Canada, followed by the vast boreal forests and lakes of British Columbia before descending over the Cascade Range into Seattle.