Free: All time
Probably everybody knows at this point that flying with budget airlines is most of the times way cheaper than flying with major airlines. However, not that many people are savvy about all the low-cost airlines that exist and the countries they operate in. Cheap flight ticket aggregator sites also often times do not include prices from these budget airlines. To get the most up-to-date list of all low-cost airlines in the world, visit the Wikipedia page aptly titled “List of Low-cost airlines” (link below). The airlines are grouped by countries. So if you find yourself travelling within Peru, you now know that you have three budget airlines to choose from instead of just having to stick with LAN Airlines.
Website: en.wikipedia.org/wiki/List_of_low-cost_airlines
Photo credit: Kain Kalju (Flickr CC)