American Airlines Flight 444

Dulles () is an unincorporated area in Loudoun County, Virginia, United States, and is part of the Washington metropolitan area. The headquarters of Northrop Grumman Innovation Systems and ODIN Technologies, as well as the former headquarters of MCI Inc. and AOL are located in Dulles. The National Weather Service Baltimore/Washington forecast office and the National Weather Service's Sterling Field Support Center are also both in Dulles.

Dulles International Airport is a planned Washington Metro station at Washington Dulles International Airport in Loudoun County, Virginia, U.S., on the Silver Line. Originally planned to be operational by 2018, the station is now expected to open in July 2022. The station was originally planned to be underground, but was built as an above-ground station next to daily parking garage one.

Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD), typically referred to as Dulles International Airport, Dulles Airport, Washington Dulles or simply Dulles ( DUL-iss), is an international airport in the Eastern United States, located in Loudoun County and Fairfax County in Virginia, 26 miles (42 km) west of Downtown Washington, D.C. Opened in 1962, it is named after John Foster Dulles (1888–1959), the 52nd U.S. Secretary of State who served under President Dwight D. Eisenhower. The Dulles main terminal is a well-known landmark designed by Eero Saarinen, who also designed the famous TWA terminal (now the TWA hotel) at New York's JFK airport. Operated by the Metropolitan Washington Airports Authority, Washington Dulles Airport occupies 13,000 acres (20.3 sq mi; 52.6 km2) straddling the Loudoun–Fairfax line. Most of the airport is in the unincorporated community of Dulles in Loudoun County, with a small portion in the unincorporated community of Chantilly in Fairfax County. Dulles is one of the three major airports in the larger Baltimore–Washington metropolitan area, the others being Reagan National Airport and Baltimore/Washington International Airport, and by land size and amount of facilities is the largest of the three. Dulles is considered the region's international air hub, with dozens of nonstop international flights. Dulles has the most international passenger traffic of any airport in the Mid-Atlantic outside the New York metropolitan area, including approximately 90% of the international passenger traffic in the Baltimore–Washington region. It had more than 20 million passenger enplanements every year from 2004 to 2019, with 24 million enplanements in 2019. On a typical day, more than 60,000 passengers pass through Dulles to and from more than 125 destinations around the world.Increased domestic travel from Reagan National Airport has eroded some of Dulles's domestic routes. Dulles overtook Reagan in total enplanements in 2019. However, in 2018, Dulles Airport surpassed Ronald Reagan Washington National Airport (DCA) in yearly passenger boardings after having fewer passengers since 2015. Furthermore, it still ranks behind Baltimore/Washington International Thurgood Marshall Airport (BWI) in total annual passenger boardings.Dulles is a hub for United Airlines and is frequently used by airlines which United has codeshare agreements with, mostly composed of Star Alliance members like Turkish Airlines and Lufthansa.

Willard (also known as Willard Crossroads) was an unincorporated community located in what is now a part of Washington Dulles International Airport in the U.S. state of Virginia. The village was named after Joseph Edward Willard, a delegate to the Virginia General Assembly from 1893 to 1901, then Lieutenant Governor of Virginia. Although Willard lived in Loudoun County, he represented Fairfax County, because the village was only 1,500 feet (460 meters) from the county border. Willard owned a 50-acre (20-hectare) estate in Fairfax. His father was Joseph Clapp Willard, the owner of the famed Willard Hotel in Washington, D.C. Willard was at the intersection of Willard Road (now Stonecroft Boulevard) and Sterling Road (now Horsepen Road), surrounded by extensive farmland, housing, schools, places of worship, the Willard store (until 1907), and Blue Ridge Airfield (1938–1951). Willard stood west of Floris, north of Pleasant Valley, and south of Farmwell (now Ashburn). Willard was regarded as a crossroads and a distinctive community until construction of Washington Dulles International Airport began in 1958. Approximately 26 square miles (67 square kilometers) of Virginia land from Willard, Chantilly, Pleasant Valley, Sterling, and Ashburn was bought for construction. By the airport's completion, all remains of civilization before 1958 on this land had virtually disappeared, except a stretch of Willard Rd (used as a service road), and three storage outbuildings between Runways 1C/19C and 1R/19L.

Innovation Center (preliminary names Route 28, Herndon – Dulles East) is a planned Washington Metro station in Fairfax County, Virginia on the Silver Line. It will be located adjacent to the Virginia Center for Innovative Technology at the intersection of the SR 267 and SR 28 in McNair, near the Fairfax / Loudoun county line. Originally planned to begin operation in 2018, the station is now expected to open in July 2022.

McNair is a census-designated place located in the Oak Hill section of Fairfax County, Virginia, United States. It is directly to the east of Washington Dulles International Airport. The population as of the 2010 census was 17,513. Much of the population resides in the McNair Farms planned community. The community has a school called McNair Elementary.McNair is also home to the Dulles Corner Business Park, home to the headquarters of Airbus Group, Inc. and Northrop Grumman Technical Services.

Cortona Academy, founded in 1992, is a private, co-educational, college preparatory academy in Herndon, Virginia, serving grades 7–12. It serves students from the greater Washington area. The campus is situated in Herndon and 100% of Cortona seniors are accepted to college.

King Abdullah Academy (KAA; Arabic: أكاديمية الملك عبد الله) is a Saudi Arabian international school located in Floris, an unincorporated area in Fairfax County, Virginia in the Washington, DC metropolitan area. In proximity to Herndon and Dulles International Airport, it serves ages 4–18, grades preschool through 12.The academy opened in the fall of 2016. There were no hearings from the Fairfax County government required for the occupation of the campus because land which KAA occupied was already zoned for educational purposes. In 2015 Michael R. Frey, the Fairfax County Supervisor, stated that residents of the area around the school had not expressed opposition to its placement there.Students in pre-school and elementary school (KG-5th Grade) are in co-gender classes while middle and high school students are separated by sex, although some specialized high school classes may be co-gender.

The Frying Pan Meetinghouse (also known as Frying Pan Old School Baptist Church (1832) or Frying Pan Spring Meeting House) is a historic church building within Frying Pan Farm Park in Floris, Virginia. It was built in 1791 as a church building. In 1984 the last remaining trustee deeded the building to the Fairfax County Park Authority to preserve and maintain the property. The building and cemetery were added to the National Register of Historic Places in 1991.

Floris is a census-designated place (CDP) located within the Oak Hill area of Fairfax County, Virginia, United States. The population as of the 2010 census was 8,375.

Loudoun Gateway is a planned Washington Metro station in Loudoun County, Virginia on the Silver Line. It will be located at SR 606 (Old Ox Road) and the ramps to SR 267. Originally planned to begin operations in 2018, the station is now is now expected to open in July 2022. In April 2015, the Washington Metropolitan Area Transit Authority approved the Loudoun County Board of Supervisors' name for the stop.

Merrybrook is the only known remaining home of American Civil War Confederate spy Laura Ratcliffe. The house is located south of Herndon, Virginia, in Fairfax County. She lived here from the earliest days of the Civil War until her death in 1923. The interior, out-buildings and grounds still retain the atmosphere of earlier times. In early March 2007, the Virginia Department of Historic Resources approved the current owner's application and placed Merrybrook on the Virginia Landmarks Register. The application to put Merrybrook on the National Historic Register is currently awaiting approval from the National Park Service. However, urban encroachment continues, the recent widening of Centreville Road was a near miss for Merrybrook which still survives behind the trees.