Soo... me and my best friend decided to go literally "wherever" by plane for as cheap as we can (<50€ per person for a return ticket) and I am looking for a service that offers a free API to search for plane tickets as it would make my and her life much easier if I could just write a program, let it run on my Raspberry Pi and make it send me an email whenever it finds some cheap tickets. I noticed that Google lets you search for cheap plane tickets, but is there an API (even unofficial) that I could use?