What does the airport code DCA stand for?

The airport code DCA stands for Ronald Reagan Washington National Airport, located in Arlington, Virginia, just across the Potomac River from downtown Washington, D.C. This code is essential for identifying the airport in various travel, logistics, and aviation planning contexts.

Understanding the use of airport codes is vital in the aviation industry, as they serve as standardized identifiers for locations, making communication and operations more efficient. Other options like Denver, Philadelphia, and San Diego have their own unique codes and are unrelated to DCA. This highlights the importance of knowing both the airport's location and its corresponding designator code, as only DCA accurately represents the airport in question.