To get a great deal on a ticket, it used to be advised that you go to the airport, get listed on standby and get a great ticket for a cheap price. However, that is no longer the case. Since the airline industry has drastically changed, it's now best to turn to the Internet for help when unexpected plans or occurrences give you the need to fly immediately. Getting a last minute airline ticket is possible, but getting one cheaply requires a bit more strategy.
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To better arm yourself with a good deal, call the airlines in advances. Your airline of choice--especially if you are a frequent traveler--may cut you a special deal. It's more likely than not that you'll get a better deal by looking at comparison-based websites for a good deal on your last minute flight (see Resources below).
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Don't be afraid to let the airline know if it's an emergency due to the illness of a loved one or a death in the family. Many airlines will work with you to do what it takes to accommodate you in emergency situations. Take notes of all conversations you have with an airline about such a situation. If you are treated poorly along the way, and address the airline about the problem in your time of need, you may receive some form of compensation
Source :www.ehow.com/contributor