Russia's biggest domestic airline is located how many km north of Chelyabinsk?
S7 Airlines S7 Airlines, legally PJSC Siberia Airlines (Russian: ПАО «Авиакомпания "Сибирь"» "PАО Aviakompania Sibir"), is an airline headquartered in Ob, Novosibirsk Oblast, Russia, with offices in Moscow. As of 2008, it was Russia's biggest domestic airline. Its main bases are Domodedovo International Airport and Tolmachevo Airport.
Mordovia Airlines Saransk Air Enterprise (Saranskoe aviapredpriatie) was an airline based in Saransk, Mordovia, Russia. It operated regional scheduled and charter passenger services, as well as aerial work.