In its latest schedule, which runs through February 13, 2013, Southwest will begin new service between Nashville and New York LaGuardia, offering two daily...

Southwest Airlines and its wholly owned subsidiary AirTran Airways have extended their flight schedules for travel bookings through February 13, 2013.

In the latest schedule, Southwest will begin new service between Nashville and New York LaGuardia, offering two daily non-stop round-trips.

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Southwest Airlines also will begin four new winter seasonal routes.

These include a daily round-trip in each of four markets: Nashville-Fort Myers; Fort Lauderdale Hollywood International Airport-Phoenix; Milwaukee-New Orleans; and between Ontario International Airport in California and Reno in Nevada.

AirTran Airways’ flight schedule remains consistent with its existing winter flight schedule, according to Southwest.

To book flights, visit www.southwest.com or www.airtran.com.