Kayak.com enables users to compare hundreds of travel sites with one search making it a great time saver and putting an excellent comparison tool right at your fingertips. It is important to note, however, that in certain regions, especially in Europe, there are a variety of low-cost and budget airlines that may not show up on some of the bigger sites (like Kayak). For these low-cost carriers, it will be necessary to do a little more research and go directly to their websites. You can find more information on some of these carriers in our Travel Websites section.