The latest Hotels.com price index survey has indicated a continued increase in the cost of accommodation in London and key European cities.
The average price of a room in the UK capital in the second quarter of 2007 was £119, a jump of 19% year-on-year.
Major tourist destinations such as Venice, Geneva, Paris and Oslo have also seen double-digit growth in prices over the same period.
Moscow continues to lead the global list with an average room costing £192 a night, up by 18%.
Hotels.com tracks around 30,000 hotels to create its regular Hotel Price Index survey and is seen as an accurate benchmark of accommodation costs around the world.
Hotel prices increased by just 0.8% year-on-year globally, the index indicated, but Europe continues to grow significantly with a 5.2% rise.
Asia saw an overall increase of 0.6% while the US and the rest of the world dropped.
Patrik Oqvist, marketing director of Hotels.com, said: “While prices across Europe are up, many major global cities have actually experienced a price drop since last year, making some destinations great value for travellers.”