Where you fly from
Always compare cheap airlines tickets with major airline companies that fly to your destination. If you are prepared to do a little extra traveling, the cheapest air fares are not always from the airport which is closest to you.
The day which you fly
You may save by including a Saturday evening stay-over or by purchasing the plane ticket at least 14 days in advance to get cheaper tickets. Ask which days of the week and times of the day have the lowest fare.
And where you book
Even if you are using a travel agent, check airline and Internet travel sites, and look for special deals. Also look out for flight auction sites where you can save significantly. If you call, always ask for the cheapest airline fare to your destination.