Bad news for those who frequently travel out of Portland International Jetport - JetBlue announced that it will be ending year-round service out of PWM. According to WMTW, the decision was made based on weaker demand for flights in the colder months. JetBlue will continue to fly out of Portland in the summer months, when demand typically surges. The last day of daily service from JetBlue will be January 19th, 2019. Seasonal service should start back up right around Memorial Day.