Government departments spent more than £120 million on hotels in two years, with the Ministry of Defence alone racking up a £98 million bill, official figures show.
MoD staff stayed 396,076 nights in UK hotels at a cost of £65 million and 127,700 nights overseas at a cost of £33 million between 2008 and 2010.
This is the equivalent of £258 per night for accommodation abroad and £164 per night in Britain.
The MoD has recently come under fire over the cost of hotels for Defence personnel stationed in Italy as part of the Nato operation against Colonel Muammar Gaddafi’s regime in Libya.
Seven other Whitehall ministries responded to Freedom of Information requests by data analysts Tableau Software.
The Department of Transport revealed that it spent £6.1 million on hotels, including nearly £9,000 on five-star accommodation, over the two-year period.