I looked at several airports in New England including Logan (Boston), MHT (Manchester, NH), & PWM (Portland, Maine). Manchester, NH is about one hour from Boston. Portland, ME is about two hours from Boston. I checked several airline prices and reviews including: American, United, & Jet Blue. At the time I was planning my trip United & Jet Blue had the least expensive fares (around $190/person round trip). I had not flown either airline prior to this trip.
After reading reviews for each carrier I selected Jet Blue departing from DFW Airport and flying into Logan International Airport in Boston, Massachusetts. That was a GREAT decision on my part! Jet Blue has direct flights from Dallas to Boston. I takes about 3 1/2 - 4 hours to fly to Boston. They have plenty of leg room for a coach seat which helps with that long of a flight. There is a choice of 10+ TV stations and Sirius XM radio in every seat. Oh and did I mention that your first bag flies FREE? Finally, I was most pleased with the on-time service both going and coming back home. I highly recommend flying Jet Blue!
Note: Jet Blue is known to offer great sales. A sale in mid July 2014 had a great sale for the first week in August 2014 with non-stop round trip fares from Dallas to Boston for $120 per person. Yes I meant to type ROUND TRIP. It was an incredible sale that I would have jumped on but I had just gotten back from my trip and did not see a point in going back that soon...