Seattle based Farecast, a startup that launched about 18 months ago to focus on predicting flight prices and guaranteeing users against increases, just expanded to help people find deals on hotel rooms as well.

The hotels area of the site helps users see prices based on a number of travel search engines (Orbitz, CheapTickets and ReserveTravel). All the results are shown on a map along with price and other basic information.

But the service also looks at each of the hotels to let you know if it’s priced attractively or not. For most hotels, the star rating isn’t enough to tell if the price is too high or low v. local competition. Over the long run market forces even the playing field, but a traveler unfamiliar with a specific hotel can (and often is) overcharged occasionally. Farecast will help you understand if you are getting a deal or not on that specific hotel.

Hotels with good deals are marked in red. Over priced rooms are blue. Click on the image for a larger view of the interface.

This is much different than their flight business, which is based on helping people predict if airfares will likely increase or decrease before the flight date. But travelers looking for a good hotel at the best price possible will find this equally useful.