Cheapflights.com is a good place to start searching for flights. The homepage provides blanks where you enter your starting airport and destination. The website will pull up deals. If you have specific travel dates, it will allow you to pull up separate windows from different travel sites. This way, you can compare flight prices on Priceline, Expedia and other leading sites.
Orbitz is another popular and well-advertised website for booking travel. Its homepage is packed with links to travel deals. It is generally more useful, however, to simply employ its search engine to look for flights, especially if you have certain dates in mind.
Travelocity, like all other travel websites, presents a form to fill out on the homepage if you want to quickly search for flights. If you are browsing flights or looking for cheap vacation flights, Travelocity provides an organized, tabbed home page where you can find deals without reading lists of links.
Expedia is a reliable site that consistently offers some of the cheapest flights and hotels. Its layout is simpler than Orbitz, but its home page is busier and more confusing than Travelocity.
If you have a specific airline you like, you can check that airline's website. It will offer a search engine similar to those of travel sites. Finally, compare prices of at least 2 to 3 travel websites before booking a flight. Websites such as Priceline.com, Cheapair.com and Cheaptickets.com also can be helpful.
