Search flights from nearby airports. This is a very simple and effective trick to find cheap flights. Sometimes flights from local airport to your destination can be quite expensive while, on the contrary, flights from nearby airports can be really cheap. For example, international flights from Seattle are quite cheap when compared to international flights from Vancouver and the distance between the two cities is only 234 km (about a two and half hour drive). So driving or taking a bus to the nearby airport is sometimes a good way to get to your destination cheaply.
Fly on multiple airlines. Looking for flights on single airlines may be the easiest, but you may have better results if you look into flying on multiple airlines. Try taking one airline to your destination, and a separate one from. Or, include a layover with another airline mid-flight. Breaking up your trip and splitting it between carriers is likely to save you money, which is worth the extra time and hassle it will cost you.
Most major cities in the USA have reliable public transport options to transfer you to the city centres. For example, LAX has a shuttle bus ‘G’ to the Metro Green Line and JFK has the AirTrain connecting to the New York subway. Buses and taxis are also plentiful if you don’t want to negotiate traffic. However, in some cities hiring a car may be the quickest and convenient option to get around especially if you plan on doing a road trip. You’ll find all the major car rental agencies at most US airports, including Budget, Dollar, Hertz and Thrifty.
Another thing to note when you're booking your flight tickets online is to consider extra fees and "hidden" charges such as credit/debit card fees, baggage, meals, certain seats, extra leg room et cetera. Factor all these in before you compare between different airlines and flights before making the final purchase. Most online travel portals require you to pay via credit card, and may charge you a hefty credit card fee. But some sites also accept PayPal (including American Airlines website aa.com, Agoda.com, hotels.com). If you buy tickets directly from most airlines, you also won't be charge a credit card fee, and you should take those charges into consideration when choosing between booking through an airline website or other travel websites. Some online travel agencies let you pay via wire transfer from your bank account.
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”.