Are there nonstop flights from West Sound (WSX) to Seattle (LKE)?

Yes. Kenmore Air fly this route. Flight time is about 38m.

West Sound → Seattle

Westsound/WSX Seaplane Base (WSX) to Kenmore Air Harbor Seaplane Base (LKE)・119 km

Nonstop flights available (1 airline). Flight time about 38m. Nonstop return flights also operate.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.