Portland, Maine - The Portland International Jetport today announced that American Airlines will start Summer seasonal service to Dallas-Ft. Worth, TX starting June 6 ,2020. The service will run on Saturdays through October 3, 2020. American Airlines is the largest airline at the Jetport and today’s announcement opens up the sixth nonstop route joining, Charlotte, Chicago, New York City (LaGuardia), Philadelphia, and Washington D.C.