Westminster is served by Denver International Airport (DIA), about 30 minutes east via US-36 and I-270. From downtown Denver, US-36 runs directly through Westminster toward Boulder — the city's main commercial strip follows this corridor.
RTD (Regional Transportation District) operates bus and light rail connections to Westminster. The Westminster Station on the B Line light rail connects to downtown Denver Union Station in about 25 minutes. From Boulder, the Flatiron Flyer express bus uses the US-36 managed lanes and reaches Westminster's transit stations in around 20 minutes. A car is useful for getting around within the city, as the suburban layout is not particularly walkable between destinations.