Look into neighboring airports. The nearest major airport is a mere 20 minutes from your house, but several smaller airports are located within an hour’s drive. Rather than relying on the nearest or largest airport only, look into neighboring airports as well. These smaller airports aren’t controlled as heavily by large airline carriers, and have more ability to adjust their tickets and offer lower prices. Spend a few extra dollars to drive to an airport further away, and you may save several hundred on your flight bill.
Compare between different airlines (regular and budget) and between the different classes of seats offered! If you can enjoy business class on a budget airline for the same money you'd pay to fly economy on a more "prestigious" airline, more power to you. You end up in the same destination but get to enjoy a more comfortable, luxurious experience. Why not?
Pick a date when nothing is going on and you will get much
In Google Chrome or Safari, incognito is enabled by hitting Command (or “Control” if using PC), Shift, “N”. For Mozilla Firefox or Internet Explorer, hit Command (or “Control” if using a PC), Shift, “P”. This will open a new browser window where your information is not tracked, thus not inflating prices as you search. Note: if you're using an older version of OS X, open Safari then click “Safari” in the menu bar, and select “Private Browsing”.