According to Order of the Ministry of Finance of the Russian Federation No 03-03-06.4.99 dated 17.07.2007,
"...reporting documents to the accounting department of the organization for the used air ticket are: e-ticket itinerary receipt, original boarding pass»
Thus, in order for the accounting department to be able to correctly take into account the purchase of air transportation, it is necessary to print the itinerary receipt with a separate VAT line, and save the boarding pass.