Firm: Orlando Millennium space tight By Henry Magenheim / May 14, 1999 Share 1 -- ORLANDO -- US Airways Vacations reported limited air and hotel availability for its Orlando Millennium air-inclusive program, which applies to two-night and longer stays at a choice of hotels between Dec. 19 and Jan. 3. Rates include roundtrip air on US Airways, MetroJet or US Airways Express.Of the 24 hotels usually available, at press time, only seven had some millennium-period rooms left, according to the tour operator. The properties are Comfort Inn, Holiday Inn SunSpree, Embassy Suites, Marriott Residence Inn and Lake Buena Vista Resort, all in Lake Buena Vista; the Holiday Inn Hotel & Suites in Kissimmee, and Loews Portofino Bay in Orlando.A two-night package out of Boston departing Dec. 30 is priced at $565 per person, double. Included are roundtrip air, a room at the Comfort Inn Lake Buena Vista, an Alamo four-door compact, Wet 'N Wild admission, Planet Hollywood lunch and related taxes.A four-night version out of Boston, priced at $1,054 per person, double, adds a two-day Universal Studios Escape pass and Walt Disney World's four-day All in One Hopper pass.The operator noted it is not offering any trip-cancellation waiver and post-departure travel protection options with millennium packages. Also, more stringent restrictions apply for revisions and cancellations of such bookings. US Airways Vacations, Phone: (800) 455-0123.