Travel is returning to normal as airlines, train operators and bus companies resume full schedules today.

At about 8:30 this morning, a US Airways flight from New York’s LaGuardia Airport touched down at the Portland International Jetport, the first commercial flight to arrive since Tropical Storm Irene passed over Maine, said airport Director Paul Bradbury.

Among the flights operating today are US Airways’ flights to Philadelphia and LaGuardia, Jetblue Airways’ flights to New York’s JFK, AirTran Airways’ flights to Baltimore, Delta Air Lines’ flights to Atlanta, Continental Airlines’ flights to Cleveland and all United Airlines’ flights.

Routes not operating today include US Airways’ service to Charlotte, AirTran’s flights to Atlanta and Continental’s Newark flights.

Bradbury expects service to those cities to resume on a regular schedule tomorrow.

Patricia Quinn, executive director of the Northern New England Passenger Rail Authority, said Amtrak trains between Portland and Boston will resume normal service starting with train 684, which is slated to leave Portland at 12:50 this afternoon.

The rail authority carried passengers to Boston by bus this morning as crews cleared railroad tracks of debris.

Concord Coach Lines is also operating a full schedule today, said a telephone agent.