Room rates in hotels in the area of the Olympic Park have shot up for the Games period, according to a survey.
Average one-night rates in the London postal district E, which covers the Olympic site at Stratford, are 69% more during the Olympics than earlier this summer, the survey from TripAdvisor found.
Those wishing to stay in the area will be paying an average £221 for the period July 20 to August 15 compared with £139 between June 1 and July 19.
The next biggest increase judged by postcode is in district N where prices have risen 60% to £156.
The London postcode area with the smallest increase between early summer and the Olympics period is the SW area, where room rates have only risen 19% to £222.
However, the most expensive rooms during the Olympics are not in east London but in the EC district which covers the City of London. Here, prices have risen 40% to £309.
TripAdvisor spokeswoman Emma Shaw said: "London hotel prices are generally higher during July and August in any year.
"But with London gearing up for such a significant influx of visitors this summer, some may not be surprised to see spikes as high as 69%."