Anyone still wondering where to go on vacation in the next few months might get some ideas from the 20 top hotel destinations searched for this coming summer on, the price-comparison travel site. Most popular: Las Vegas, where the average hotel rate from June through August is $130, down slightly from summer 2010. Most expensive: New York, where rooms averaged $218, up nearly 15 percent from a year ago. Biggest increase: Bangkok, whose average room rate was up a whopping 40 percent from last year. (On the other hand, the summer average for a hotel in Bangkok is just $117, so stop complaining.) Cheapest: San Jose, Costa Rica, with an average rate of $94.

The data are based on searches from March 1 to May 25 for travel in June, July, and August. Robert Birge, chief marketing officer of Kayak, points out that despite general price increases, there are still some good values. "Vegas is a market where you can get a hotel pretty cheap," he says. "Same with Miami. More hotels than people need." gets more than 70 million travel queries a month for airlines, hotels, and rental cars; much of its data is available to consumers here.

Here are the top 10 cities for domestic and international hotel searches on for this summer, with the average room price and percentage increase/decrease over last summer.

Las Vegas: $130.22 (-3.93%)
New York: $218.23 (14.98%)
Chicago: $168.96 (6.59%)
Boston: $209.22 (20.08%)
Orlando:$106.49 (-45.49%)
San Francisco: $161.01 (20.79%)
Washington, DC: $173.43 (22.09%)
San Diego: $157.94 (7.75%)
Miami: $136.77 (1.55%)
Los Angeles: $136.87 (17.96%)

London: $188.28 (7.01%)
Paris: $210.76 (23.73%)
Barcelona: $149.66 (10.06%)
Rome: $178.85 (14.84%)
Toronto: $153.98 (21.04%)
Bangkok: $117.34 (40.38%)
Madrid: $129.24 (14.50%)
Athens: $169.40 (34.91%)
San Jose, Costa Rica: $93.97 (16.18%)
Lima: $107.79 (14.60%)

Smart Traveler Mark Orwoll is the International Editor of Travel + Leisure. Follow him on Twitter.