Which city is represented by the airport code RDU?

The airport code RDU represents Raleigh/Durham, North Carolina. This code is assigned to the Raleigh-Durham International Airport, which serves the Research Triangle area of North Carolina, encompassing the cities of Raleigh and Durham. The use of "RDU" combines elements from both city names, making it memorable and relevant for travelers.

In the context of this question, it's important to note that airport codes are typically derived from the names of the cities they serve, and RDU aligns perfectly with this convention, as it effectively captures the primary cities linked to the airport. Understanding the significance of the airport code system helps reinforce the geographic associations that passengers and airlines rely upon when navigating air travel.