I am trying to figure out if there are any major hidden catches for discount airlines in Europe. I want to travel from Berlin to Lisbon this summer, and flying is so much quicker. Right now it looks like it only costs about 40 euro, on EasyJet. Has anyone taken these flights? It appears that you can take up to about 43 lbs (20 kilo) of luggage without additional charges. The price seems too good to be true! Do you know how far in advance you have to purchase these tickets to get a good deal?