Silversea is introducing a $499 roundtrip economy air add-on from more than 50 gateways in the U.S. and Canada. The special air offer is available on six Silver Discoverer voyages sailing in October, November and December to Asia and the Indian Ocean.

"These new $499 air add-ons offer extraordinary value for travelers looking to book passage to dream destinations located in some of the most remote corners of Asia Pacific," said Mark Conroy, Silversea's managing director for the Americas.

The $499 air add-on offer is valid on new cruise bookings for the featured sailings made on or after April 21, 2016. It is a capacity-controlled program, airline and routing are at the discretion of Silversea, and the program may be modified or discontinued at any time without notice, said Silversea.