The Southwest plane was carrying 108 passengers, but the JetBlue aircraft was empty.
Passengers on the Southwest plane felt a "bump" when the aircraft struck the JetBlue jet.
"We had just boarded the plane and the plane was backing out and we felt a little bump," one woman said, according to CBS Boston. "Next thing I knew, the man beside me said 'Oh, we're missing a wing.'"
No one was hurt and the passengers on the Kansas City-bound plane were brought to a secure area to be re-booked,
"At 7:08 this morning, a Southwest aircraft was pushing back from the gate when the wingtip struck the horizontal stabilizer of an empty parked JetBlue aircraft. There were no injuries and no impact to airport operations," MassPort said in a statement.
Both planes sustained minor damage.
"Our employees are working to get the 108 customers scheduled on the flight to Kansas City re-accommodated on other flights to complete their journey. The aircraft is out of service for repairs and inspections," Southwest Airlines said in a statement.