JetBlue Airways is counting on more than low fares to make its ledgers jet-black. The carrier offers one-class service -- with leather seats, satellite TV from DIRECTV, satellite radio from XM, and movies -- to about 80 cities in more than 20 US states, Mexico, Colombia, Costa Rica and the Caribbean (including Puerto Rico, the Bahamas, and the Dominican Republic). Most of its flights arrive or depart from one of six key markets: Boston; Orlando and Fort Lauderdale, Florida; Long Beach, California; San Juan, Puerto Rico; and New York. JetBlue's fleet of about 180 aircraft consists of Airbus A320s and Embraer 190s. It owns one subsidiary, in-flight entertainment system developer LiveTV.