S7 Airlines has scheduled numerous additional flights to the cities hosting the World Cup. On some routes, the number of flights on match days has been doubled or tripled, according to Travel.ru's own correspondent.
However, this was achieved by reducing flights to cities not involved in the tournament. On some routes, one or two flights per day have been cancelled. Passengers on these routes will likely be offered either the remaining scheduled flights or refunds for their tickets.
The additional flights are numbered 5,000 and 6,000 (5XXX and 6XXX). On some routes (for example, from Moscow to Rostov-on-Don and Kazan), up to 10 flights per day will operate on match days instead of the usual 3-5 departures. Furthermore, larger aircraft have been deployed on some routes—for example, Airbus A321s instead of A319s to Rostov, and Airbus A320s and Boeing 737s instead of Embraer 170s to Saransk.
As a result, in many cases, Siberia Airlines has the highest capacity of any airline before or after matches. The company has scheduled numerous flights close to the start and end times of games, including numerous night flights. By comparison, Aeroflot has made almost no adjustments to its scheduled flights during the World Cup. True, it has also cancelled flights to non-football destinations, but these aircraft are primarily available for charter flights ordered by the World Cup organizing committee and are not available to the general public.
The new flights will also significantly facilitate travel for passengers not flying to the football match. If a flight isn't suitable for fans (for example, arriving in the host city after the match has ended to pick up fans on a return flight), it will typically have the lowest fares on that route. However, the most convenient flights for World Cup spectators, even if they are additional, are quite expensive.
Source: travel.ru