The San Diego MTS bus system is a public transport bus service serving San Diego County, California. It is part of the San Diego Metropolitan Transit System (MTS). The system operates 97 bus routes in San Diego and the rest of the southern half of the county. There are 85 "MTS Bus" fixed-route services, 9 "Rapid" bus rapid transit routes, and the "MTS Access" paratransit service.

Routes are operated by private contractors and by the San Diego Transit Corporation (SDTC), a subsidiary of MTS. SDTC operates 27 routes based out of downtown San Diego (Imperial Avenue Division), Transdev operates 74 routes based out of Chula Vista (South Bay Division) and El Cajon (East County Division), and operates the "MTS Access" paratransit service that are operated with mini-buses based out of Kearny Mesa (Copley Park Division).

All buses and division facilities, even those used by contractors, are owned by MTS. MTS serves San Diego proper and the surrounding East County and South Bay regions, while the North County area is served by the North County Transit District (NCTD)'s BREEZE bus system.

Routes Rapid Routes

Type Route TerminalsVia Annual ridership (FY 2025)LinksNotes SuperLoop Rapid/ La Jolla Village Dr, Nobel Dr 2,473,822 Schedule Executive Dr, Judicial Dr, Nobel Dr 67,088 Schedule Rapid Downtown San DiegoSanta Fe Depot College AreaSDSU Transit Center El Cajon Bl 1,467,179 Schedule Frequent service Downtown San DiegoSanta Fe Depot Otay MesaOtay Mesa Transit Center SR 125, I-805 638,488 Schedule Imperial BeachImperial Beach Pier (weekdays)

Otay Mesa WestIris Avenue Transit Center Otay MesaOtay Mesa Transit Center Coronado Av, SR 905 893,851 Schedule Frequent service Downtown San DiegoSanta Fe Depot EscondidoEscondido Transit Center I-15 1,243,956 Schedule Frequent service237 Mira MesaMiramar College Transit Station Torrey PinesGilman Transit Center (UCSD) Mira Mesa Bl 172,007 Schedule Weekday peak only Rapid Express Downtown San DiegoPacific Hwy & Grape St EscondidoEscondido Transit Center I-15, SR 163 52,597 Schedule Weekday peak only Downtown San DiegoPacific Hwy & Grape St Sabre SpringsSabre Springs Transit Station I-15, SR 163 62,020 Schedule Weekday peak only

Local Routes

RouteTerminalsVia Annual ridership (FY 2025)LinksNotes1 Mission ValleyFashion Valley Transit Center La MesaLa Mesa Boulevard station El Cajon Bl 966,626 Schedule Frequent service2 Downtown San DiegoFront St & B St North Park30th St & Adams Av Broadway, 30th St 588,007 Schedule Frequent service3 Chollas ViewEuclid Avenue station HillcrestFront St & Arbor Dr Ocean View Bl 1,077,900 Schedule Frequent service4 Downtown San Diego12th & Imperial Transit Center Skyline HillsParadise Valley Rd & Meadowbrook Dr Imperial Av 489,696 Schedule5 Downtown San Diego10th Av & Broadway Chollas ViewEuclid Avenue station Market St 458,322 Schedule6 Mission ValleyFashion Valley Transit Center North Park30th St & University Av Camino De La Reina 231,016 Schedule7 Downtown San DiegoFront St & B St Redwood VillageUniversity Av & College Av University Av 1,900,135 Schedule Frequent service8 Old TownOld Town Transit Center ClairemontBalboa Avenue Transit Center Grand Av, Mission Bay Dr 610,094 Schedule Frequent service9/9A Old TownOld Town Transit Center Pacific BeachJewell St & Garnet Av Ingraham St, Sea World 261,156 Schedule Route 9A does not enter Sea World10 Old TownOld Town Transit Center Redwood VillageUniversity Av & College Av

City HeightsCity Heights Transit Center University Av 1,032,824 Schedule Makes limited stops east of Albatross St11 Downtown San Diego1st Av & Broadway College AreaSDSU Transit Center Adams Av, 1st Av 513,100 Schedule12 Downtown San Diego12th & Imperial Transit Center Skyline HillsParadise Valley Rd & Meadowbrook Dr National Av, Skyline Dr 926,378 Schedule Frequent service13 National City24th Street station GrantvilleCrawford St & Zion Av (Kaiser Hospital) Fairmount Av 1,900,795 Schedule Frequent service14 GrantvilleGrantville station La MesaBaltimore Dr & Lake Murray Bl 70th St, Camino Del Rio 50,706 Schedule Weekdays only18 Camino Del Rio 17,207 Schedule 20 Downtown San Diego10th Av & Broadway Rancho BernardoRancho Bernardo Transit Station I-15, Fashion Valley Transit Center, SR-163 403,558 Schedule Express service25 Mission ValleyFashion Valley Transit Center Kearny MesaKearny Mesa Transit Center Aero Dr, SR-163 56,593 Schedule Weekdays only27 Kearny MesaKearny Mesa Transit Center Pacific BeachBayard St & Garnet Av Garnet Av, Balboa Av 276,354 Schedule28 Old TownOld Town Transit Center La PlayaAnchorage Ln & Shelter Island Dr Rosecrans St 251,002 Schedule30 Old TownOld Town Transit Center University CityUTC Transit Center La Jolla Bl 1,132,931 Schedule Frequent service31 University CityUTC Transit Center Mira MesaMiramar College Transit Station Miramar Rd 83,172 Schedule Weekday peak only35 Old TownOld Town Transit Center Ocean BeachCable St & Newport Av Midway Dr, Cable St 370,229 Schedule Frequent service41 Mission ValleyFashion Valley Transit Center Torrey PinesGilman Transit Center (UCSD) (weekdays)

University CityUTC Transit Center (weekends) Genesee Av 818,049 Schedule Frequent service43 Kearny MesaKearny Mesa Transit Center ClairemontBalboa Avenue Transit Center Clairemont Mesa Bl 451,991 Schedule44 Old TownOld Town Transit Center Kearny Mesa Kearny Mesa Transit Center Linda Vista / Mesa College 819,763 Schedule Frequent service60 University CityUTC Transit Center Chollas ViewEuclid Avenue station I-805, I-15, SR-15 52,132 Schedule 83 Old TownOld Town Transit Center Downtown San DiegoAmerica Plaza station Reynard Way / Mission Hills 19,867 Schedule Weekdays only84 Point LomaCabrillo National Monument Point LomaSub Base Gate Rosencrans St (Sub Base) or Catalina Bl (Cabrillo Monument) 15,365 Schedule Weekdays only88 Old TownOld Town Transit Center Mission ValleyHotel Circle North & Fashion Valley Rd Hotel Circle 84,565 Schedule105 Old TownOld Town Transit Center University CityUTC Transit Center

ClairemontClairemont Square Morena Bl, Clairemont Dr 203,332 Schedule115 College AreaSDSU Transit Center El CajonEl Cajon Transit Center Jackson Dr, Fletcher Pkwy 204,813 Schedule120 Downtown San Diego4th Av & C St Kearny MesaKearny Mesa Transit Center

Serra MesaSharp Memorial Hospital Fashion Valley Rd, Linda Vista Rd 515,605 Schedule 701 Chula VistaH Street station Chula VistaPalomar Street station Main St, Hilltop Dr, F St 331,659 Schedule704 Chula VistaE Street station Chula VistaPalomar Street station Naples St, Orange Av 361,591 Schedule705 Chula VistaE Street station Chula VistaSouthwestern College E St, Otay Lakes Rd 176,367 Schedule Monday–Saturday only707 Chula VistaEastlake Pkwy & Olympic Pkwy Chula VistaSouthwestern College Eastlake Pkwy 94,300 Schedule Weekdays only709 Chula VistaH Street station Chula VistaOlympic Pkwy & Eastlake Pkwy H St 685,950 Schedule Frequent service712 Chula VistaPalomar Street station Chula VistaSouthwestern College Palomar St 531,326 Schedule Frequent service815 El CajonEl Cajon Transit Center El CajonMain St & Oakdale Av Main St 331,398 Schedule Frequent service816 El CajonEl Cajon Transit Center Rancho San DiegoCuyamaca College Washington Av, Jamacha Rd 99,938 Schedule Weekdays only832 Cuyamaca St, Woodglen Vista Dr, Magnolia Ave 36,524 Schedule Loop service, operates clockwise833 SanteeSantee station El CajonEl Cajon Transit Center Graves Av 77,508 Schedule834 Mission Gorge Rd 23,070 Schedule 838 Granite HillsEast County Square AlpineViejas Casino Alpine Bl 100,978 Schedule848 El CajonEl Cajon Transit Center LakesideMapleview St & Ashwood St Winter Gardens Bl 259,033 Schedule851 La MesaSpring Street Station La PresaSpring Valley Shopping Center Bancroft Dr, Sweetwater Rd 64,468 Schedule Weekdays only852 San DiegoOrange Av & 54th St La PresaGrossmont Transit Center University Av 240,640 Schedule854 La PresaGrossmont Transit Center El CajonGrossmont College Lake Murray Bl 60,255 Schedule Weekdays only854X La PresaGrossmont Transit Center El CajonGrossmont College SR-125 Schedule Express service. Operates when Grossmont College is in session for Fall and Spring semesters855 La MesaSpring Street station Rancho San DiegoJamacha Bl & Folex Way Campo Rd 207,564 Schedule856 College AreaSDSU Transit Center Rancho San DiegoCuyamaca College College Av, Jamacha Bl 458,766 Schedule Frequent service864 El CajonEl Cajon Transit Center Granite HillsEast County Square Madison Av 275,824 Schedule872 Chase Av, Magnolia Av 38,115 Schedule 874/875 Washington Av, Parkway Plaza, Broadway 250,835 Schedule 901 Downtown San Diego1st Av & Broadway Otay Mesa WestIris Avenue Transit Center Silver Strand Bl 584,435 Schedule904 CoronadoGlorietta Bl & 2nd Av CoronadoSilver Strand Bl & Av de las Arenas Orange Av 66,837 Schedule During summer: frequent service, fare-free905 Otay Mesa WestIris Avenue Transit Center Otay MesaOtay Mesa Transit Center SR 905, Otay Mesa Rd 217,875 Schedule906/907 Otay Mesa WestIris Avenue Transit Center San YsidroSan Ysidro Transit Center Beyer Bl, San Ysidro Bl, Calle Primera 1,180,158 Schedule 909 Otay MesaOtay Mesa Transit Center Otay MesaSouthwestern College Otay Mesa Otay Mesa Rd, Britannia Bl 42,881 Schedule Weekdays only910 Downtown San Diego Santa Fe Depot San Ysidro San Ysidro Transit Center I-5 Schedule Night owl express service only while the Blue Line Trolley are not operated on night owl service.916/917 Streamview Dr, Massachusetts Av 126,612 Schedule 921 San DiegoUTC Transit Center Mira MesaMiramar College Transit Station Mira Mesa Bl, Barnes Canyon Rd 220,561 Schedule Weekdays only921A Torrey PinesGilman Transit Center (UCSD) Mira Mesa Bl, Mesa Verde Park Weekends only923 Ocean BeachPoint Loma Av & Sunset Cliffs Bl Downtown San Diego9th Av & C St Voltaire St, Harbor Dr 140,287 Schedule Weekdays only928 Kearny MesaKearny Mesa Transit Center Mission ValleyFashion Valley Transit Center Ruffin Rd 158,142 Schedule929 Otay Mesa WestIris Avenue Transit Center Downtown San Diego12th & Imperial Transit Center Highland Av, 3rd Av 1,465,026 Schedule Frequent service932 National City8th Street station (weekdays and Saturdays)

Chula VistaE Street station (Sundays) Otay Mesa WestIris Avenue Transit Center National City Bl, Broadway 817,392 Schedule Frequent service933/934 Imperial Beach Bl / Palm Av 1,233,741 Schedule 936 College AreaSDSU Transit Center Spring ValleyOrville St & Brucker Av College Grove / Skyline Drive 359,817 Schedule Frequent service944 Sabre SpringsSabre Springs Transit Station PowayHilleary Pl / Hilleary Park Dr Poway Rd 51,108 Schedule Weekdays only945/945A Rancho BernardoRancho Bernardo Transit Station PowayTemple St / Midland Rd Pomerado Rd, Poway Rd 105,396 Schedule 955 National City8th Street station College AreaSDSU Transit Center 43rd St / Euclid Avenue station / 54th St 1,032,715 Schedule961 National City24th Street station EncantoEncanto/62nd Street station 30th St / Plaza Bonita / Woodman St 497,064 Schedule Frequent service962 National City8th Street station Spring ValleyOrville St & Brucker Av Plaza Bl / Paradise Valley Rd 471,933 Schedule Frequent service963 National City8th Street station Paradise HillsSaipan Dr & Potomac St Plaza Bl / Reo Drive 117,137 Schedule Frequent service964 Mira MesaCamino Ruiz & Capricorn Way Scripps RanchAlliant International University Miramar College Transit Station 108,587 Schedule Weekdays only965 University Av / Azalea Park / Home Av 46,238 Schedule 967 National City8th Street station Alta VistaDivision St & Ava St D Av / Division St 38,773 Schedule Weekdays only968 National City8th Street station National CityWestfield Plaza Bonita 4th St / Euclid Av 51,975 Schedule Weekdays only985 University CityUC San Diego Central Campus station Torrey PinesTorreyana Rd & Science Park Rd N Torrey Pines Rd 35,413 Schedule Weekday peak only992 Downtown San Diego4th Av & Broadway San DiegoSan Diego International Airport Broadway / Harbor Dr 384,835 Schedule Frequent service

Rural Routes