Cut cantaloupe should be stored in the refrigerator in airtight plastic bags for 2 or 3 days. Source(s): http://face.centosprime.com/wordpress/20...eport Abuse. If it is cut up in a zip lock bag, 1 day. If the 1/2 is covered with plastic wrap, 3 days. If it is in a covered container (cut up) 2 days.