Willimantic is served by several state routes: Route 14, Route 32, Route 66, Route 195, and Route 289. It is additionally served by the Willimantic Bypass (US 6), a controlled-access highway. Notably, the only connections to the outside world are via surface roads, as the Willimantic Bypass is only divided between its two intersections with Route 66. In the 1960s, Interstate 384 was intended to connect Willimantic to Hartford in the west and Providence in the East, but the plan was eventually abandoned.