Travel deals: Up to 50 per cent off - Royal Caribbean International's One Big Sale

Royal Caribbean International's annual One Big Sale promo sees savings on shared stateroom bookings.

Book for two and get up to 50 per cent off the second passenger's fare, and up to 25 per cent off the third and fourth passengers' fares as well as up to $US1000 onboard spending money.

Choose a nine-night Tropical Explorer Cruise departing Sydney on March 1 onboard Explorer of the Seas from $1599 a person twin share for the first fare and $799 a person for the second. On sale till sold out.