The greater Reykjavík area is served by a public bus system, Strætó (http://www.straeto.is/english). The towns further out on the Reykjanes peninsula are connected to each other and Reykjavík by bus routes run by SBK (http://www.sbk.is/). Reykjavík Excursions (http://www.re.is/) operate the FlyBus service, connecting Keflavík International Airport to BSÍ bus terminal in Reykjavík.
Southwest Iceland is not on the ring road, and mainly connects to it via Reykjavík. The primary road on Reykjanes is no. 41 known as Reykjanesbraut, the Reykjanes route and connects Reykjavík and Keflavík. There are also roads along the south and west coasts of the peninsula, connecting with Reykjanesbraut in several locations. Compared to other lowland areas, Southwest Iceland has a very sparse road system. This is because nobody lives in the middle of a lava field, and most of Reykjanes is one big lava field, despite it being mostly lowlands as well.