Murcia Airport at San Javier is the closest airport to the resort of Mar de Cristal. This journey should take you no more than 20 - 30 minutes by car. You may wish to view the Google map for directions or download the directions to the Riberabeach Apartments.
Alicante Airport is approximately 1 hr 20 minutes drive to Mar de Cristal. The Google map will help to direct you to the resort. You may find it useful to download the directions above, which also contains a small diagram to help you locate the apartment.