S7 Airlines, legal name JSC Siberia Airlines, is an airline headquartered in Ob, Novosibirsk Oblast, Russia, with offices in Moscow. As of 2008, it was Russia's largest domestic airline, with its main bases at Domodedovo International Airport and Tolmachevo Airport. It is a member of the Oneworld alliance but its membership is currently suspended due to Russia's invasion of Ukraine.
SOURCE: Wikipedia