Hotel rates have gone up in the majority of 40 cities monitored by global hotel metasearch site Trivago. Average Paris hotels recorded the highest monthly rise in September, with a 45% increase to €167 a night. Vancouver saw the most significant decrease over August with the average price per night falling 12% to €187. London remains one of the most expensive European cities with an average hotel price per night of €142, as does Lisbon with €121 per night. Rates have risen by 29% in Vienna and by 38% in Berlin on average this month, making both cities the most expensive they have been so far this year. Average hotel prices in several cities in the US, including Las Vegas, are also the highest they have been this year.