easyjet

I will be taking 3 flights in Europe and I’m wondering if I should book my flights now or wait and hope that the prices don’t increase and book when I’m there.
I understand by not booking now that it allows for more flexibility, but I also do not want the prices to increase and end up having to pay an arm and a leg.
If anyone has any info on the airports listed below, I welcome all information.

VCE —> FCO $22 EasyJet
CIA —> GRO $30 RyanAir *Not looking forward to using these airports.
BCN —> CDG $46 EasyJet

THANKS!

What do you think is the most efficient way to get from Naples to Venice PER experience? The trains seem to take in average 8 hours. some less some more. My friend&I are on a budget, so when I saw that with easy jet we could fly from Naples to Venice for 24E, it seemed like a good idea. But to be honest, I’m looking to know if I’d waste just as much time GETTING to the airport, boarding, delays, getting from the airport in venice…
I am just looking to hear people’s experiences. What would you say is the best way?