On July 4, flights at Reagan National Airport (DCA) will be significantly disrupted due to planned Independence Day celebrations, including the America 250 events. The airport will halt operations for most of the day, with runways closing after noon, leading to possible flight delays and cancellations. This unprecedented shutdown could also trigger severe travel chaos across the East Coast as passengers face disruptions unseen in two decades. Travelers are advised to check for updates on their flights as the FAA imposes security measures and airspace control affecting this busy travel period.