I’d hit up Rob’s Rides. He is based in Berlin. If he can’t get you to the airport you need he can get you to the lower Irving’s in Berlin where the Concord Trailways bus does a pick up around 7:00 am. I don’t know what time your flight is, but that might be your best bet. If taking the bus is not an option and Robs Rides doesn’t travel far enough south, call Dave’s Taxi. They are out of Littleton and I do recall them transporting to airports, although I don’t know the costs.