royal caribbean alaska cruises the costco travel experts graciously and professionally guided me appreciated being asked questions that helped me save money on carnival cruise lineⓡ alaska cruise round-trip from seattle • balcony stateroom aboard carnival spirit • $140 costco shop card • variety of restaurants and specialty dining options • serenity adult-only retreat • skybox sports bar • live shows and entertainment • kid's club and youth programs from $1,102 | carnival coa shop per person* endosun