The new study ran by Hotels.com found prices for booking in March this year for August are 102% higher than for the same months last year.
The website, which is part of the Expedia group of companies, says the average price of a hotel room in London will be £213 ($337) this summer.
Between 2010 and 2011 room prices worldwide rose 4%.
The survey, of 142,000 properties in almost 20,000 locations found political events had a marked impact.
Greece’s economic woes led to a 10% fall in the price of a hotel room in Athens.
Elsewhere there were sharp movements in accommodation prices as a result of the Arab Spring and prices in Japan were affected by the earthquake.
Japan’s earthquake and subsequent tsunami in March 2011 saw price cuts in Hiroshima by 16% to $106 and in Kyoto by 11% to $144.
The Arab Spring protests and war in Libya hit prices across the Middle East and North Africa with average rates falling in Egypt by 22%, in Tunisia by 9%, in Lebanon, which borders Syria, by 21% and in Qatar by 27%.
Last year, prices fell 2% in Asia year-on-year but rose in all other areas: 8% in the Pacific, 5% in North America, 4% in Latin America, 3% in the Caribbean and 2% in Europe and the Middle East.
David Roche, president of Hotels.com, said: “Price volatility in 2011 meant UK travelers found it more expensive to stay in the majority of their favorite destinations abroad.
“A variety of factors, including currency movements and a growth in corporate travel, pushed up prices at a time when many consumers were already struggling to pay their bills at home.”
David Roche added though that room rates were still generally lower than they were in 2005.
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