Try Bestfares.com. Now offering East coast to Belize City for $409. Must be lower from Texas. Also here are 2 companies that specialize in Latin America fares: RA-Travel (1-800-788-0777). MeAgain/Travel (1-800-556-3114). I purchased my tic for under $500. with all taxes out of Philadelphia. Looking forward to flight in 6 days, don't think it will be my last.