2. Consider scheduled "flag" carriers, such as BA, especially for last-minute travel. In general - and in contrast to low-cost airlines - most sell their cheapest seats last, so if you're booking near your departure date, ring the consolidators, such as STA Travel, and you may well get a lower fare on a regular airline. " Carriers such as British Airways often have excellent deals, from about £60 return, particularly for travel from April to June," says Trailfinders, which sells seats on a number of European airlines. However all airlines have complicated "yield management" computer programmes, which price tickets according to demand, fluidly as shares.