Welcome to La Palma!
The easiest way to get to La Palma is flying to Santa Cruz de la Palma - IATA airport code: SPC
Several European destinations offer direct flights or flights via mainland Spain. You can search for your options here: https://www.google.de/flights/
From almost every island in the Canaries, you can sail to La Palma’s port in Santa Cruz, with a number of ferry operators offering regular sailings. There are also weekly, long-haul ferry crossings from Cadiz, on the Spanish mainland. For your options, click here: http://www.la-palma-tourismus.com/en/ferries_canary-islands.htm