Seattle-Tacoma International (SEA) to Heathrow (LHR). Served by Delta, British Airways.
A nonstop flight from Seattle to London takes approximately 9h 30m.
Delta and British Airways fly from SEA to LHR. That's 2 airlines serving this route.
The distance is 4,787 miles (7,702 km). with a nonstop flight time of about 9h 30m. Airlines on this route include Delta, British Airways.
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