Roadtrip,
Boeing is moving toward being an assembler rather than building all the components. They sold off much of their Wichita operation, now called Spirit Aerospace or some such. Spirit makes major assemblies (say 737 fuselages) and ships them to the Seattle area for final assembly.
This is also the case with the 787. Major parts of the plane are built in Japan under a risk-sharing arrangement which reduces Boeing's investment in the development costs.
This isn't a new thing. Shorts in Northern Ireland builds major portions of Canadian Bombardier aircraft. The Irish operation is now owned by Bombardier and has been Northern Ireland's largest manufacturing employer.