US Airways will offer direct service from Reagan National Airport to 11 new destinations as the result of a slot swap arranged last year with Delta Air Lines.

Under a deal that received federal approval in October, US Airways traded 132 slots at New York’s La Guardia Airport in return for 42 slots at National. A slot means one arrival and departure each day.

“When our expansion is completed, US Airways will offer more than 230 daily flights and directly support more than 1,500 aviation jobs at Washington National,” US Airways chief Doug Parker said in a statement announcing details of the plan.

Beginning March 25, US Airways will offer new nonstop flights to and from Birmingham, Ala.; Fayetteville, N.C.; Islip, N.Y.; Little Rock; Jacksonville, N.C.; Pensacola, Fla.; Tallahassee; and Fort Walton Beach, Fla. No other airline offers direct flights between National and those cities.

US Airways will compete with other airlines in launching service to Memphis, Omaha and Ottawa. Two airports that already had weekend US Airways flights — Bangor, Maine, and Savannah, Ga. — will now have weekday service. A daily direct flight to Hartford, Conn., will also be scheduled.

The airline said it plans to add more routes from National next month.