Carnival Cruise Lines extended its cancellation of all port calls in Mexico through June 15.
Sixteen cruises that were scheduled to stop in Mexico will be put on modified itineraries.
Carnival is giving passengers the option of rescheduling their cruise for a later date through the end of 2010.
Four- and five-day cruises out of New Orleans and Galveston, Texas, have been modified to seven-day cruises. Customers who don't want to switch to a seven-day cruise out of Galveston or New Orleans may opt to receive their refund in the form of a future cruise credit or money back.
Click here to view full details on the modified itineraries.