(The Center Square) -Plans to remake Washington Dulles International Airport expanded into a more than $20 billion project Wednesday as federal officials, the Metropolitan Washington Airports Authority and United Airlines unveiled an expanded redevelopment plan. The proposal increases planned investment from about $7 billion, building on Dulles’ long-term master plan. The Airports Authority said much of the project’s cost will be financed through municipal bonds issued in partnership with airlines serving Dulles. The announcement said the expanded project builds on improvements already planned while significantly increasing the airport’s long-term investment. According to the Airports Authority, Dulles handled a record 29 million passengers in 2025, a 6.4% increase from the previous year.