Despite the relatively large size of both the city proper and the metropolitan area, San Antonio has always been a medium-sized market. It presently ranks 33rd in the United States, according to marketing research firm ACNielsen. By comparison, the other two Texas cities with populations of over a million people, Houston and Dallas, are among the 10 largest markets. This is mainly because the nearby suburban and rural areas are not much larger than the city itself. Additionally, the close proximity of Austin truncates the potential market area. San Antonio-based TV stations are WOAI channel 4 (NBC), KSAT channel 12 (ABC), KENS channel 5 (CBS), KABB channel 29 (FOX), KCWX channel 2 (myNetworkTV), KMYS channel 35 (The CW) and KLRN channel 9 (PBS). The market is also home to six Spanish-language stations, three religious stations, three independent stations and one Internet-based station (210 TV). , the San Antonio market has 65% cable TV penetration. Yearly events, such as Fiesta San Antonio (the city's signature event), Luminaria (a contemporary arts festival) and Fiesta Noche del Rio, add a variety of entertainment options to the area, as well as strengthening the economy. Fiesta San Antonio alone carries an annual economic impact of $340 million. The city also plays host to SAFILM-San Antonio Film Festival every summer in August. About to celebrate 25 years, the film festival is the largest in South Texas. The San Antonio International Airport (SAT) is located in uptown San Antonio, about eight miles north of Downtown. San Antonio International Airport is the 6th busiest airport based on passenger boardings in Texas and 44th in the United States. It has two terminals and is served by 11 airlines serving 42 destinations. In May 2017 Air Canada opened its reach to Texas creating a non-stop flight between San Antonio and Toronto. Stinson Municipal Airport is a reliever airport located six miles (10 km) south of Downtown San Antonio. The airport has three runways and is also home to the Texas Air Museum. A bus and rubber tired streetcar (bus) system is provided by the city's metropolitan transit authority, VIA Metropolitan Transit. VIA's full fare monthly unlimited Big Pass is $38 per month. VIA began operating a Bus Rapid Transit line known as VIA Primo in December 2012, which connects Downtown San Antonio to the South Texas Medical Center, the main campus of the University of Texas at San Antonio, and the independent enclave city of Leon Valley.