If your trip to Portland, ME Airport (PWM-Portland Intl. Jetport) is all booked but your travel itinerary is looking a little empty, let us give you a few hints and tips.Stay in the airport terminal or get out and take a look at the sights? We know what we'd choose. It's definitely worth making the short journey over to University of Southern Maine.Travelers from all over the place come to see Maine Mall, so make it one of your first stops after you touchdown. Also worth checking out are State Theatre and Thompson's Point.