Hi, I travel this route every year. After driving through Europe the boat from Venice to Corfu is a great way to unwind. Minoan Lines have office all through Europe and a websiet www.minoan.gr they also have an agen in London England Viamare - telephone number : 0207 431 4560 - they also have a website but I don't remember the address - sorry.
In January I flew Ryan Air from London Stanstead to Venice Treviso for 1p plus tax (return flights totalled £20.00) then took the coach from the airport, approx 45 mins (4 euro) to main bus terminal in Venice where I took the free bus Minoan Lines provide from the square to the ship. Ryan Air's website provided good information about the destination airport. They also advertise for the south of Italy.
The journey on the boat is approx 23 hours.
I hope the above is helpful.