Kamchatka is a penisula, yet life there feels like on the island and so are the meanings of travel. The only way you can get to Kamchatka is by air. Russian major airline Aeroflot operates regular flights to Kamchatka from Moscow, Saint - Petersburg, Novosibirsk, Vladivistok and Khabarovsk.
Besides Aeroflot, there is also another air company Rossiya Airline that operates flight to Kamchatka from Moscow.