Royal Caribbean International today announced an offer for vacationers to experience an Oasis-class vacation just in time for the new spring season.

For a limited time, vacationers can enjoy an upgrade to a Central Park- or Boardwalk-view balcony stateroom when they book an inside stateroom aboard select April 2011, seven-night sailings of Oasis of the Seas and Allure of the Seas. For a shorter, four- or five-night cruise getaway, vacationers can enjoy an upgrade to an oceanview balcony stateroom when they book an inside stateroom for select April 2011 sailings aboard Navigator of the Seas.

The offer is only valid for new U.S. and Canada individual bookings made from March 25 through April 3, 2011, for the April 9, 16, and 23 departures of Oasis of the Seas, April 17 and 24 departures of Allure of the Seas, and April 9, 14, 18, 23, and 28 departures of Navigator of the Seas. Guests must book a Category Z inside stateroom and quote option code “SEE7” at the time of booking in order to redeem upgrade offer. Offer is limited to available inventory.