How to catch the lowest possible airfares

Let's get one thing clear from the start: airfares are volatile. While it's true that flying on a Tuesday or Wednesday is cheaper than on a Friday or Sunday, there is no magic time of day, day of week or month of year to book a low airfare. Airfares can change in a heartbeat, high one minute and low the next, and the trick is to buy when a fare on your route becomes a bargain.