JetBlue
JetBlue offers low-priced flights to more than 50 U.S. destinations, as well as cities in Mexico, Costa Rica and Colombia. The airline offers free snacks, free live DirectTV and XM Radio and free in-flight access to e-mail services and instant messaging.
Frontier
Frontier also flies to more than 50 U.S. cities. In addition, it services San José, Colombia, and five cities in Mexico. Perks include in-flight movies and DirectTV for a nominal fee as well as sandwiches, salads and snacks available for purchase.
Spirit
Spirit touts itself as the "leading ultra-low cost carrier in the U.S." The airline serves close to 40 cities, including destinations in the Bahamas, Caribbean and Latin America. The "$9 Fare Club," available for an annual fee, allows members access to special promotions, including occasional one-cent flights.
Virgin America
Virgin America offers low-cost flights to and from 10 U.S. cities, including Los Angeles, New York City and San Francisco. Passengers can enjoy free in-flight access to 3,000-plus MP3s and live TV. Drinks, snacks and meals can be ordered by touch screen and paid for by credit card. Wi-Fi access is available for a fee.
Southwest
Southwest provides no-frills, budget service to more than 60 U.S. cities. The airline also offers discounted hotel, cruise and vacation packages.
