WASHINGTON (AP) — Hundreds of flights were canceled Thursday at the three airports serving the Washington and Baltimore areas as a result of a major winter storm that dumped more than a foot of snow on parts of the region.

Washington Dulles International and Ronald Reagan Washington National airports closed early Thursday. Runways at Dulles reopened at 12:40 p.m., allowing flights from Europe to make their scheduled afternoon arrivals, Metropolitan Washington Airports Authority spokeswoman Kimberly Gibbs said. At Reagan National, the runways were still closed at 4 p.m., although the terminal was open.