Great news for PWM. Runway lengths and demand aren’t as big of problems compared to something I believe the Jetport lacks big time: MARKETING. The Jetport may be the easiest and most convenient mid sized airport in the country and there aren’t commercials, ads, billboards, or anything else promoting it.
The runway can support A321s, B737-9er and MAXs, and for freight, an A300 which is quite large. Runway length is not a problem looking at overseas flights. Boston has flights to Iceland, Ireland, and the UK in the same aircraft types the Jetport sees everyday.
I believe that if the Jetport were to promote these new flights, the convenience of flying PWM, and all the benefits you don’t get at BOS or anywhere else, then demand would go through the roof!!