If you want to travel by train from Kuala Lumpur to Georgetown Penang Island (Pulau Pinang), you can take the new fast Electric Train Services (ETS for short), as all the older diesel Intercity Express services have now been replaced by these newer, much faster trains.
There are a number of ETS train departures every day from either the old KL railway station (Terminal KTM) or KL Sentral station to Butterworth, Penang Sentral, with both ETS Gold services and the slightly faster ETS Platinum services (these trains have fewer stops along the route).
Kuala Lumpur ke Pulau Penang dengan Keretapi (untuk Georgetown)
If you want to travel from KL to Penang Island (George Town, Pulau Pinang) you will have to take the branch line to Butterworth Railway Station.
Once you arrive in Butterworth, it is a short walk from the station to the ferry terminal (jetty) over to Penang island.
Regular car and passenger boats leave Butterworth every 15 minutes during peak hours, taking you over to the Jetty in George Town in around 15 minutes.
Or you can see the full northbound ETS train schedule by clicking on the link below:
(Keretapi Kuala Lumpur ke Bukit Mertajam)
All trains that travel to Butterworth also stop off at Bukit Mertajam on route, arriving there around ten minutes before the train arrives at Butterworth.
(Membeli Tiket Keretapi dari Kuala Lumpur ke Negeri Pulau Pinang)
These trains are very popular (especially at the weekend and during Malaysian holidays), so advance booking is highly recommended.
Booking your train seats in Malaysia is fairly easy.
You have a choice of either:
Visiting any KTM mainline railway station and buying your advance tickets from the station ticket counter (ticket counter opening times vary, so you may want to check locally at what time tickets can be purchased).
This is easily the best option as it saves you the time and cost of travelling out to the station.
If the trains are full or you want to see how much a bus from Kuala Lumpur to Penang costs:
Buses from KL to Penang mainly operate from either the TBS Bus Terminal or Hentian Duta Bus Terminal, but you can also take less infrequent buses from the train station at KL Sentral and Kuala Lumpur Old station (often called Terminal KTM).