S7 Airlines has launched direct scheduled flights from St. Petersburg to Irkutsk. There has been no direct air service between the cities since 2012.

As reported by the Pulkovo Airport press service, the first flight was carried out on May 25. From that moment on, for the first time in a long time At this time, tourists from the Northern capital were given the opportunity to travel to Lake Baikal.
Flights are expected to be operated on Airbus A320neo aircraft up to four times a week.
It's worth noting that in the 2019 summer season, S7 Airlines added six new cities to its route network at Pulkovo Airport, including Barcelona, Palma de Mallorca (Spain), Olbia (Italy), Anapa, and Voronezh. Furthermore, starting June 1, 2019, the carrier will launch direct scheduled flights from St. Petersburg to Nice, France's Côte d'Azur.
Source: trn-news.ru