Where an airline is unable to operate a flight and the flight is cancelled, passengers can avail of a refund or re-routing under Regulation 261/2004, as described above. However if the flight goes ahead and the passenger is not able to take that flight, passengers, although not entitled to a refund under Regulation 261/2004, may be entitled to claim back the taxes/fees/charges portion of the ticket price under Article 23 of EU Regulation 1008/2008. The airline should be contacted in the first instance. The conditions attached to any offers by airlines e.g. in the form of vouchers for booking flights in the future or cost and charges associated with a new flight booking are at the discretion of the airline itself. However airlines are obligated to ensure that under EU Regulation 1008/2008 the final price of a flight with associated taxes and charges is always known to the consumer or clearly displayed e.g. in the online booking process before the consumer accepts to book.