If you're traveling abroad, you may already rely on Web sites such as Expedia to find the lowest prices on flights, hotels and rental cars.

But according to Budget Travel magazine, some U.S.-based travel sites have set up overseas counterparts, such as Expedia.fr to directly compete with companies there ... and might offer you a better price.

Airlines' local Web sites are another option. And other travel Web sites only make arrangements with companies to list their offerings in the local market --- for example, if you planned to fly somewhere and take a discount domestic airline.

Also:

Insurance and taxes are sometimes included in the price on foreign rental car websites—a key difference from the U.S. sites. Renting a car in England for a week on alamo.co.uk, for instance, is more than $300 cheaper than renting on alamo.com because the collision damage waiver, theft protection, and taxes are all bundled into the price. On alamo.com, the coverages—considered optional—and taxes are added at the end. Check the insurance policies on the foreign sites carefully, though, as there's no universal rule for what's covered from country to country. 

There's a couple of caveats, though: