Delta Air Lines said it has added flights and upsized aircraft on flights out of south Florida as Hurricane Irma bears down on the region. New flights will transport customers from Miami, Palm Beach, Fort Lauderdale and Key West to Atlanta, Delta’s largest hub.

“Meanwhile, a weather waiver has been issued to reflect the expected travel disruption to destinations in south Florida and throughout the Caribbean. The waiver allows customers to change plans without incurring a fee,” Delta said at…