Ryan Donato had two goals and an assist for Seattle, and Andre Burakovsky scored 1:10 into overtime to give the Kraken a 4-3 victory over the New Jersey Devils.
The Canucks snapped two-game losing streak as the speedy Elias Pettersson scored on a third-period breakaway to lead Vancouver to a 5-2 win over the Wild.
It's Washington's first Cup Final appearance since 1998. Ovechkin scored early, Holtby stopped 29 shots for his second straight shutout of the Lightning 4-0.