European city breaks are booming this Christmas season, with Madrid, Barcelona, Rome, and Warsaw showing remarkable growth in hotel bookings, driven by travelers seeking festive charm, cultural richness, and convenient short-haul escapes. New data from RateGain reveals strong early planning and longer stays, signaling deeper, more immersive travel experiences. With affordability, safety, and accessibility top priorities, European capitals are becoming the preferred holiday choice, reshaping festive travel trends for 2025.