Now I can help you:
You have three public transport options for travel between Naples and Palermo.
NOTE: There is no hydrofoil service between Naples and Palermo. The "fast giant catamaran" previously operated by SNAV Lines on this route was discontinued several years ago.
As you have indicated that you will be staying "in the Sorrento area", you will likely need to travel back to Naples in order to proceed on to Palermo.
If you want to travel by plane, you can reach the Naples Airport from Sorrento by DIRECT airporter bus (Curreri Bus Lines) in one hour. If you want to travel by train, you can reach the Naples Central train station in 75 minutes by Circumvesuviana commuter light rail. If you want to travel by overnight ferry (which may be your best option), you'll need to reach the Naples Ferry Port from the Naples central train station by taxi or local city bus. You might also be able to find a hydrofoil from Sorrento to Naples which docks at Molo Beverello (and not at Mergellina) (from Beverello you can walk to the Palermo ferry), but the schedules must allow you sufficient connection time.
To recap, your three options are: air, train, or overnight ferry.
You can search the various schedules from the hyperlinks at the end of this posting.
Below I've provided a "cut and paste" (from a previous posting of mine) with more information about these three options:
UPDATE ON FARES as of January 4, 2008:
Checking the various websites, here is an update on fares for travel between Naples and Palermo:
AIR:
60.69 Euros one way on Air One.
NOTE: Alpi Eagles airlines has been grounded by action of the Italian Civil Aviation Authority, allegedly for lack of airworthy aircraft (as well as failure to pay airport landing fees). This leaves Air One operating the route.
FERRY:
46.50 Euros for a reclining seat on SNAV Lines
47.56 Euros for a reclining seat on Tirrenia Lines
NOTE: Twin and Quad cabins also available at a higher fare.
TRAIN:
35.80 Euros (or 26.20 Euros AMICA fare) for a second class seat on the EXP night train.
47.50 Euros (or 38.40 Euros AMICA fare) for a second class seat on either of the two daylight ICP trains
NOTE: Sleepers and couchettes also available on the night train at a higher fare. First class seats available at a higher fare on the daylight trains (but NOT on the night train)
OPINION: If you're in a hurry, take the plane. If you're travelling by night, take the overnight car ferry. If you want to enjoy the coastal scenery, take the EARLIER of the two ICP daylight trains.
www.flyairone.itwww.snav.itwww.tirrenia.itwww.ferroviedellostato.itwww.vesuviana.it (Circumvesuviana light rail)
www.curreriviaggi.it (airporter bus to Naples Airport)
CAVEAT: At the "end of June" (as you state above), you should RESERVE in advance if you want a CABIN on the overnight ferry, or a SLEEPER on the overnight train. You have much more leeway (and don't need to reserve much in advance at all) if you plan to take the daylight train or if you will accept a reclining seat on the overnight ferry. As for plane travel, booking well ahead usually insures getting a low rate.
ANY QUESTIONS?