Washington to Lisbon flight path: IAD to LIS

Sit on the Left side of the plane for the best views on flights from Washington to Lisbon. While both sides are dominated by hours of open Atlantic Ocean during cruise, the left side wins overall because the Lisbon arrival sequence delivers a much richer, more identifiable cityscape and river view than the brief DC glimpse on departure.

During takeoff from Washington Dulles International (IAD), sit on the Right side for the best views. As the aircraft climbs out of Dulles and turns east toward the Atlantic, the right side offers a fleeting but genuine glimpse of the Washington DC skyline and the Potomac River basin to the south before the route heads out over open water. The left side mostly shows the flat Virginia Piedmont with little to distinguish it. Notable sights include: Potomac River, Washington DC skyline (Washington Monument area), Dulles Airport perimeter, Northern Virginia suburbs.

When landing at Lisboa (LIS), sit on the Left side for the best views. On the descent into Lisbon, arrivals under typical northerly wind conditions fly south over the city before turning onto final approach, giving a strong view of the Tagus River estuary, the 25 de Abril Bridge, and the rooftops of central Lisbon on the left side of the aircraft. The right side mostly faces open countryside or the river's far bank with less detail. Notable sights include: Tagus River estuary, 25 de Abril Bridge, Lisbon historic center rooftops, Belém district near the river mouth.

The flight from Washington Dulles International (IAD) to Lisboa (LIS) takes about 6 hours 50 minutes. The shortest flight path between them is 3,583 miles (5,766 km); winds and air traffic control usually add a few percent.

The route crosses the open North Atlantic Ocean for most of its length, passing well north of the Azores with no land visible for several hours until the Portuguese coastline comes into view near the descent.