Dallas-Fort Worth International Airport is the busiest airport in Texas and is one of the top cargo airports in the world. The airport itself is so large, the U.S. Postal Service gave it its own zip code (75261) and city designation (DFW Airport). Moving over 60 million travelers every year, DFW Airport is the world's sixth busiest and is second only to Honolulu International Airport as the country's busiest international gateway.