Royal Caribbean: Kids Sail Free on Select Sailings — $0 cruise fare for additional guests 12 & under sharing a stateroom with the first two full — fare guests, on select 3+ night sailings departing on or after 9/16/26. Blackouts include Thanksgiving, Christmas/New Year, 3/5 — 4/4/27 and 5/28 — 8/20/27.