According to airport statistics, 178 airlines operate flights to and from Washington Dulles International Airport as of September 2025.

This includes:

• Major U.S. carriers

• International airlines

• Regional airlines

• Cargo operators

Dulles is one of the most globally connected airports in the Mid‑Atlantic region.

📍 Where Is Dulles Airport Located?

Dulles Airport is located in Northern Virginia, specifically in Loudoun County and Fairfax County.

Key location facts:

• 26 miles (42 km) west of downtown Washington, D.C.

• Serves the entire Washington metropolitan area

• Official airport code: IAD

🌍 How Big Is Dulles Airport?

Dulles is one of the largest airports in the United States by land area.

According to the search results:

• 13,000 acres (20.3 sq mi / 52.6 km²)

• Ranks third‑largest in the U.S. by land area, behind Denver and Dallas–Fort Worth

Additional size details:

• 135 airline gates

• 4 runways currently in operation

• Capacity for up to 600,000 aircraft operations per year with current runways

✈️ How Busy Is Dulles Airport?

Dulles is a major international gateway.

Key stats:

• 27.3 million passengers in 2024

• 60,000 passengers per day on average

• Serves 139+ destinations worldwide

It also handles 90% of the international passenger traffic in the Baltimore–Washington region.

🏛️ Who Operates Dulles Airport?

Dulles is operated by the Metropolitan Washington Airports Authority (MWAA).

It is owned by the United States government and leased to MWAA for operation.

🏗️ Notable Features of Dulles Airport

• Iconic main terminal designed by Eero Saarinen

• Opened in 1962

• Connected to the region via the Dulles Access Highway and Metrorail Silver Line

• Major hub for United Airlines

🧭 Summary Table