Concord Coach Lines operates along the Interstate 95 corridor between Bangor, Maine, and Boston, Massachusetts, as well as the Interstate 93 corridor in New Hampshire with service from Berlin and Littleton through Concord to Boston and Logan International Airport.

Specifically it connects the following locations: Concord Coach Lines provides Amtrak Thruway motorcoach service from Portland to Bangor and from Manchester to Boston.

On May 28, 2018, a Customs and Border Patrol agent was recorded asking passengers about their citizenship status while they waited at the Bangor, Maine, terminal to board a bus to Boston.

Concord Coach Lines later released a statement on Facebook clarifying their policies, indicating that the employee was unprepared to answer that question, and that company-wide training had been put in place to address the issue.

[2][3] The following August, a 14-year-old Pakistani-American was prevented from boarding a bus leaving Rockland, Maine, by the driver.