One of my friends will be spending three weeks in GVA at the end of June to early July, and he asked me about budget flight options to go and explore other cities in Europe while he's there. Cities such as Barcelona, London, Paris, Venice, Nice etc are on the list of places to see, depending on the affordability of the tickets. Since I'm not familiar with European airlines (and especially budget airlines), I was wondering if anyone here has any advice, recommendations or suggestions as to which airlines would offer the best value?
On that note, is it advisable to book inter-European flights early to get the best price, or can they be booked, say, within a week and still be relatively cheap?
[Edited 2010-05-03 23:49:48]