I have read this thread on just how awful Ryanair can be. Still, they have a flight from Nimes to Luton in July that is by far the fastest and easiest way for me to get from Avignon to London (yes, there are several other train/plane combinations, but the schedules are such that Ryanair's flight gets me in several hours earlier).

The flight is currently selling for around 150 euros, whether one-way or round-trip. Do Ryanair fares start out high and drop as you get a few months closer, or is this likely the best fare I'll see?