Flight coupons are valid for flights in strict sequence of the passage of the transportation route specified in the ticket, starting from the departure point.
Reissue or rebooking
In case of a change of the booking class, fare type, route, carrier, the validity period of the ticket the reissue of the ticket is required.
In case of changing the departure date or of a flight number, given that the route and the booking class remain the same, the rebooking is executed.
At reissue or rebooking of the ticket a fee is applied.