I normally take the early morning ferry from Kuala Perlis or Kuala Kedah. I believe they start at 7am, or earlier if it's peak season.

Why not just take the ferry directly from Penang to Langkawi? The journey should take about 2.5/3 hrs if i'm not mistaken.

There are a lot of rental cars available at the Langkawi jetty.

penang dun have bus to k.perlis

if drive there, need to go out from which exit in PLUS highway? any map to go there? how long do i need from penang to there? and where i can park my car there?

thanks

If you are driving, maybe you can consider taking the ferry from Kuala Kedah. I normally drive overnight from KL to Kuala Kedah and take the early ferry to Langkawi. For parking, I normally park at the school opposite the jetty. Cost about RM7 per day if i'm not mistaken. Do not park in the jetty parking lot coz there were cases of flooding during high tide.

Kuala Perlis is further away and I'm not sure about the details though.

Don't know much about car rental coz I use my aunt's car in Langkawi.

from the Plus highway exit until arrive the Kuala Perlis jetty will waste 1.30 hours compare the Kuala Kedah jetty.

renting car, 70 for kancil, 100 for iswara, 120 for wira, 180 for Citation.
but that price is 2 years back la.. dont get the car renting agent before u arrive the Langkawi Jetty.