While the Seattle approach favors the left side, the right side wins overall because the long cruise phase reveals the Great Lakes region, the Canadian prairies, and the northern Rocky Mountains near Glacier National Park, followed by the North Cascades — a far more varied and dramatic set of landmarks than the mostly flat plains visible from the left.
Flown BOS to BFI? Did we get it right?
Flight Path
Boston to Seattle is 2,487 miles (4,003 km), a flight of about 5 hours 50 minutes.
Great Lakes region (Lake Erie/Ontario area), Canadian prairies of southern Manitoba and Saskatchewan, and the northern Rocky Mountains near Glacier National Park in Montana before the descent toward the Cascades
Great circle distance and headings ›
Phase by phase

Takeoff from BOS
RIGHTWith the noise-abatement departure heading north over Boston Harbor, the right side gives passengers a sweeping look at the harbor islands, Logan's runways jutting into the water, and the Atlantic coastline before the aircraft banks west toward the interior.

Landing at BFI
LEFTOn approach into BFI from the northeast, the left side faces south and southwest, giving a dramatic view of snow-capped Mount Rainier rising above the horizon along with Seattle's downtown skyline and Puget Sound during the final descent.
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About This Route
Which side of the plane should I sit on flying from General Edward Lawrence Logan International (BOS) to Boeing Fld King Co International (BFI)?
Sit on the Right side of the plane for the best views on flights from Boston to Seattle. While the Seattle approach favors the left side, the right side wins overall because the long cruise phase reveals the Great Lakes region, the Canadian prairies, and the northern Rocky Mountains near Glacier National Park, followed by the North Cascades — a far more varied and dramatic set of landmarks than the mostly flat plains visible from the left.
What can I see during takeoff from General Edward Lawrence Logan International in Boston?
During takeoff from General Edward Lawrence Logan International (BOS), sit on the Right side for the best views. With the noise-abatement departure heading north over Boston Harbor, the right side gives passengers a sweeping look at the harbor islands, Logan's runways jutting into the water, and the Atlantic coastline before the aircraft banks west toward the interior. Notable sights include: Boston Harbor Islands, Logan Airport peninsula, Atlantic coastline, Boston skyline in distance.
What can I see when landing at Boeing Fld King Co International in Seattle?
When landing at Boeing Fld King Co International (BFI), sit on the Left side for the best views. On approach into BFI from the northeast, the left side faces south and southwest, giving a dramatic view of snow-capped Mount Rainier rising above the horizon along with Seattle's downtown skyline and Puget Sound during the final descent. Notable sights include: Mount Rainier, Seattle skyline, Puget Sound, Elliott Bay.
How long is the flight from Boston to Seattle?
The flight from General Edward Lawrence Logan International (BOS) to Boeing Fld King Co International (BFI) takes about 5 hours 50 minutes. The shortest flight path between them is 2,487 miles (4,003 km); winds and air traffic control usually add a few percent.
What does the Boston to Seattle flight path pass over?
Great Lakes region (Lake Erie/Ontario area), Canadian prairies of southern Manitoba and Saskatchewan, and the northern Rocky Mountains near Glacier National Park in Montana before the descent toward the Cascades