The Boeing 737 is often seen as a symbol of American aerospace excellence. But peel back the fuselage and you’ll discover a much more intricate story—one of international collaboration, supply chain complexity, and global interdependence.

The aircraft’s thousands of components are sourced from at least two dozen countries and multiple continents. While Boeing leads final assembly in the United States, the company relies on global partners to provide specialized parts ranging from titanium forgings in Italy to cabin seating in Japan.

This global sourcing strategy, visualized by Julie Peasley and based on data from Air Framer, demonstrates the immense complexity of modern aircraft manufacturing.

Here’s a breakdown of key parts in the Boeing 737 and their country of origin:

Why Build a Jet Like This?

Commercial aircraft contain millions of precision parts, many made from exotic alloys or advanced composites. No single country holds all that know‑how. Russia’s VSMPO‑AVISMA, for instance, remains the world’s dominant source of aerospace‑grade titanium—a metal prized for its strength‑to‑weight ratio and corrosion resistance.

By tapping specialized suppliers, Boeing keeps costs competitive, earns reciprocal market access abroad, and balances political risk by spreading production across multiple jurisdictions.

Risks of Tariffs and Protectionism

However, this level of globalization exposes manufacturers to geopolitical and economic risks. According to Reuters, aerospace firms have lobbied hard to preserve tariff-free agreements between the U.S. and EU. Even temporary tariffs in past disputes have disrupted delivery schedules and increased costs.

Analysis from Harvard Business School points to rising protectionism as a major threat to supply chain stability. As governments reevaluate trade policies, the world’s major aircraft companies may be forced to rethink their international sourcing models—a costly and complex endeavor.

Discover more insights about Boeing’s diversified business beyond commercial planes in this related post on Voronoi: Boeing’s Business Is Much More Than Just Commercial Planes.