Portland International Jetport Metro bus 5 takes you to the center of town for $1.50, with departures every 30 minutes. Taxis are about $20 to downtown.
Bangor International Airport Located about 3 miles northwest of the downtown. The Capehart Community Connector bus ($1.50) runs every 30 minutes from the airport to the city center (6:15am to 5:45pm Monday through Friday, and from 7:15am on Saturday). A 10-minute taxi ride costs about $14 to the center.