PORTSMOUTH ??? Passenger air service will return to Pease International Airport this fall after more than five years without it.Allegiant Air announced Tuesday that they will resume flights out of Pease to Orlando, Fla., beginning Oct. 25 with introductory roundtrip fares on sale now for around $100 per person, including all fees.Allegiant operated flights out of Pease from 2005 to 2007 but then m