Silversea Cruises has announced 26 voyages in its Silver Select promotion, offering upgrages and credits for guests.

Through the program, cruisers are eligible to receive a two-category suite upgrade, a $500 per person air credit, or a $500 per person onboard credit.

The promotion includes 21 Mediterranean voyages from June to November on Silver Cloud, Silver Wind, or Silver Spirit, as well as 5 Alaska cruises on Silver Shadow.

Book this deal by June 30, 2014.