| Airport | City | ICAO | Enplanements (2019) |
|---|---|---|---|
| Portland International Jetport | Portland | KPWM | 1,062,873 |
| Bangor International Airport | Bangor | KBGR | 336,140 |
| Knox County Regional Airport | Rockland | KRKD | 17,133 |
| Presque Isle International Airport | Presque Isle | KPQI | 10,865 |