No one likes to clutter up their inbox, but by signing up for mailing lists from airlines and search engines, you’ll be able to get updates about all the last-minute or special deals that are happening. This is one of the best ways to ensure you find a cheap flight. Why? Because they do all the work for you! Many times, the cheap flights are only available for 24 hours, and if you aren’t always checking the web for them, you will miss out on many of the super cheap deals. I would have missed out on a round-trip ticket to Japan for $700 USD (normally $1,500) or $500 flights to South Africa! Additionally, they offer frequent flier bonuses, and those deals have also gotten me free business-class tickets. These three websites are the best to stay on top of travel deals:
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.
weekends for arrival and departure from the airport.
If a new resort opens, they may offer cheap airline tickets
The Internet is the easiest route and might save you some

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”.