Dewey Beach is at the southern end of the Delaware Beach corridor, about 120 miles from Philadelphia and 115 miles from Washington DC. By car, take Route 1 south from Rehoboth Beach — Dewey is the next town. There is limited parking and it fills quickly on summer weekends; arrive early or expect a walk.
DART First State runs bus service along the Delaware coast during summer, connecting Dewey Beach to Rehoboth Beach and points north. The Jolly Trolley also runs between Dewey and Rehoboth in summer, which is the practical way to get between the two towns if you don't want to drive. The nearest airport is Philadelphia International, about two hours away; Salisbury-Ocean City Regional Airport is closer but has limited commercial service.