Adobe Digital Insight Europe Travel Trends Report for 2017 draws from 16 billion visits to major U.S. travel, airline, hotel, car rentals, and online travel booking sites between January 2015 and March 2017. Spend by European consumers for the summer travel season is expected to slow to 5.3% year-over-year growth (down -51% from last). International and domestic online flight reservations made from UK travelers has grown by 1.8x since Jan 2015. Consumers can still save by getting the best prices on flights within or outside of Europe 36 days in advance, and hotels 29 days in advance.