Bill Orben covers banking, insurance, transportation and the economy. He rode in a P-51 Mustang, a World War II-era fighter aircraft, in the early 1990s when the Florida State Air Fair was staged at what is now Kissimmee Gateway Airport. Contact: borben@bizjournals.com; (407) 241-2891; @BillOrbenOBJ Maria Sastre — a former executive with Royal Caribbean Cruises Ltd. and United Airlines — was promoted Jan. 16 to president of Orlando-based Signature Flight Support Corp. Here’s what 56-year-old…