Systems and methods for manufacturing aircraft are disclosed. For example, an aircraft manufacturing system for repetitively manufacturing aircraft comprises a first manufacturing zone configured to repetitively manufacture first aircraft subassemblies, a second manufacturing zone configured to repetitively manufacture second aircraft subassemblies, and a third manufacturing zone configured to receive the first aircraft subassemblies from the first manufacturing zone, to receive the second aircraft subassemblies from the second manufacturing zone, and to repetitively assemble the first aircraft subassemblies and the second aircraft subassemblies into the aircraft. In another example, a method for repetitively manufacturing aircraft assemblies comprises assembling first aircraft subassemblies and second aircraft subassemblies in parallel on separate assembly lines at a common geographic region; and transferring the first aircraft subassemblies and the second aircraft subassemblies to a final assembly facility located in the same common geographic region.