public transit riders commute for more than two hours every day. The average amount of time people wait at a stop or station for public transit is 14 minutes, while 22% of riders wait for over 20 minutes on average every day. The average distance people usually ride in a single trip with public transit is 12.5 km, while 34% travel for over 12 km in a single direction. Bicycle There are extensive multi-use car-free regional pathways linking the city and county to the surrounding areas, including the King County Regional Trails System, which has of trails throughout the county. Many of the trails were converted from former railways, including the popular Burke-Gilman Trail. The Seattle Department of Transportation aims to develop a network of bike lanes, including lanes on streets, protected bike lanes, and trails, within the city by 2034. An urban bike sharing system, named Pronto Cycle Share, was launched in October 2014 and discontinued in March 2017. A pilot program allowing private dockless bike sharing companies to operate within the city began in July 2017, making Seattle the first major city in North America to feature such a system. Airports The Seattle metropolitan area has several airports that support commercial use as well as general aviation. The city's primary commercial airport is Seattle–Tacoma International Airport, locally known as Sea-Tac Airport and located in the city of SeaTac, which is named for the airport. It is operated by the Port of Seattle and is served by a number of airlines connecting the region with international, national, and domestic destinations. The airport is a major hub for Delta Air Lines as well as Alaska Airlines and its regional subsidiary, Horizon Air. Paine Field in Everett also began operating flights in March 2019 following the construction of a two-gate passenger terminal. It receives a limited number of daily flights from Alaska Airlines; prior to 2021, it also had United Airlines service. Closer to downtown, Boeing Field is primarily used for general aviation, cargo flights, and testing/delivery of Boeing airliners. In 2005, Southwest Airlines requested permission to move passenger operations from Sea-Tac to Boeing Field but were rejected by the county. Boeing Field has commercial flights to the San Juan Islands. The Kenmore Air Harbor Seaplane Base on Lake Union, immediately north of downtown, is used by two airlines that operate floatplanes to the San Juan Islands and British Columbia. New