This file contains a comprehensive PDF guide to help you and your site users find and purchase the cheapest flights online. Our website, AirportExplorer.com has been researching methods and techniques for finding cheap flights for years and has recently released this guide to be distributed for free to anyone who is interested in having it. Our goal is to increase people's knowledge and understanding of how the airline industry works, and how airfare prices are determined, thus allowing people to take advantage of simple techniques that result in cheaper airfare. This guide will go from the basics, all the way up to virtually unknown tips that very few people outside of the airline industry know. Take a look at our guide for yourself and good luck on your next airfare search!