From Alicante, there are hourly train departures for Benidorm. Buses from Valencia and Alicante leave almost hourly, too.
If you're driving, take the E-15 expressway south from Valencia or north from Alicante. The one-way toll from Alicante to Benidorm is 6.20€; the one-way toll from Valencia to Benidorm is 11€.
The tourist information office is at Av. Martínez Alejos 16 (tel. 96-585-13-11). It's open Monday to Friday 9am to 8pm, and Saturday 10am to 1:30pm and 4:30 to 7pm.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.