The former Overseas Terminal at Philadelphia International Airport is being demolished to build 800 new economy parking spaces.

The official groundbreaking is scheduled for 10 a.m. tomorrow on Island Avenue.

The 800 new spaces are expected to be ready by Thanksgiving.

The airport currently has 11,776 spaces in parking garages adjacent to the terminals and 6,350 spaces in the economy lot. In addition, the airport has 813 short-term parking spaces on ground level across from baggage claim at Terminals A through F.