Source: Airport Council International.
(Detailed PDF Map)

Freight Traffic at the World's Largest Airports, 2010

The level of freight activity at airports tends to be different than from that of passenger, especially in the United States. The Midwest being the demographic and economic centroid of the United States, many air freight forwarders have located their hubs at airports such as Memphis (Federal Express) and Louisville (UPS) that generate little passenger traffic. The importance of Pacific Asian airports is linked with the specific role of the region in the global economy, especially over electronics. Since these products tend to have a high value-to-weight ratio, air transport is particularly suitable for their shipping to North American and Western European markets. Because long distance cargo planes have less range than passenger planes, two airports play a notable intermediate role, Anchorage (Pacific Asia - North America traffic) and Dubai (Pacific Asia - Western Europe traffic).