Newtown police say two cars collided on Washington Crossing Road near Sacony Drive around 5:00 p.m. Sunday.
A Volkswagen with two teens inside flipped over several times.
The other car careened into another field, but that driver wasn't hurt.
One teenager was flown to Temple University Hospital. The other teen was rushed to St. Mary's Medical Center.
Newtown police are asking for any witnesses to please contact them at (215) 579-1000.