Buenos Aires operates six primary public transport modes: Subte (underground metro), colectivos (buses), commuter trains, taxis, app-based rides, and the Ecobici bicycle system. The Subte network comprises six lines designated A through H (line C does not exist in the sequence), with Line A opened in 1913 as the first underground railway in South America and the entire Southern Hemisphere. The network extends approximately 62 kilometers with 90 stations. Line A runs wooden-floored Belgian-manufactured cars from the 1910s on weekends for heritage service, though modern rolling stock operates weekday schedules. Trains operate from approximately 05:00 to 23:00 on weekdays, with reduced hours on Sundays. A single journey costs 125 pesos regardless of distance or transfers within the system as of 2024. Payment requires a SUBE card, a contactless rechargeable smartcard mandatory across all public transport in Buenos Aires since cash payment on board was eliminated in 2014. SUBE cards are purchased at designated kiosks marked with blue and white signage for approximately 500 pesos, though this deposit amount is not added to the travel balance.
The colectivo system operates over 130 numbered routes with approximately 18,000 buses moving roughly 4.6 million passengers daily. Unlike gridded transit systems, colectivo routes follow organic paths established in the 1920s when private operators competed for passengers, resulting in overlapping coverage with non-standard route patterns. The same SUBE card used for Subte applies to colectivos. Fares vary by distance traveled, calculated in sections, ranging from approximately 122 pesos for short trips to 270 pesos for journeys exceeding 12 kilometers within city limits. Buses display route numbers and key destinations on illuminated front panels, but printed route maps are rarely available at stops. The Cómo Llego website and app, maintained by the Buenos Aires city government, provides route planning across all transport modes with real-time vehicle locations for many colectivo lines. Colectivos operate 24 hours on most routes, with reduced frequency between midnight and 05:00.
Commuter rail serving Buenos Aires consists of seven surface lines operated by different concession companies: Mitre, Sarmiento, San Martín, Belgrano Norte, Belgrano Sur, Roca, and Tren de la Costa. These lines radiate from four central termini: Retiro (serving Mitre, Belgrano Norte, and San Martín lines), Once (Sarmiento), Constitución (Roca), and Federico Lacroze (Urquiza). The system extends service to suburbs up to 70 kilometers from the city center. Retiro station, built in 1915 with a steel-frame structure fabricated in Liverpool, England, handles approximately 600,000 passengers daily across its three separate terminal buildings. Commuter trains use the same SUBE card, with fares structured by distance and ranging from approximately 65 pesos for inner-city sections to 180 pesos for outer suburban destinations. Service frequency varies considerably by line and time of day, from every 8 minutes during morning peak on the Mitre line to 40-minute intervals on less-traveled sections of the Belgrano Sur. The Tren de la Costa is a tourist-oriented light rail running 15.5 kilometers along the Río de la Plata shoreline from Olivos to Tigre, charging premium fares of approximately 1,500 pesos because it is marketed as a leisure service rather than commuter transport.
Radio taxis and street taxis painted black and yellow are numerous throughout central Buenos Aires, with an estimated 40,000 registered vehicles. Meters calculate fares starting at approximately 650 pesos bajada de bandera (flag drop) with increments of roughly 70 pesos per additional kilometer or minute of waiting. Meters display fare amounts in pesos, and drivers legally must accept payment in cash; credit card payment depends on individual driver equipment. Tipping is not standard practice, though passengers commonly round up to the nearest convenient note. Radio taxi companies including Pidalo and Radio Taxi Premium can be summoned by phone, often adding a small dispatch fee. App-based services Uber, Didi, and Cabify operate throughout Buenos Aires after years of legal disputes with the taxi union; these services were formally recognized under regulatory frameworks in 2020. App fares typically run 15-25% below metered taxi prices for equivalent trips, with payment processed entirely through the application.
Ecobici is a public bicycle sharing system with approximately 400 stations distributed across 30 of the city's 48 barrios, concentrated in central and northern neighborhoods including Retiro, Recoleta, Palermo, and Puerto Madero. The system maintains roughly 4,000 bicycles available for free use for trips up to 60 minutes after registration through the BA Ecobici smartphone app or website. Registration requires a DNI (Argentine national identity document) or passport number, though foreign passport registration functions inconsistently according to tourist reports from 2023 and 2024. Stations are located approximately every 400 meters in covered zones, marked by blue docking posts with a touchscreen kiosk. Buenos Aires has constructed approximately 285 kilometers of protected ciclovías (bike lanes) since 2009, with major routes running along Avenida Libertador, Avenida del Libertador, and through Palermo parks. Sunday ciclovía recreativa programs close certain major streets to motor vehicles between 08:00 and 13:00, including sections of Avenida Figueroa Alcorta and Avenida de Mayo.
Walking remains practical for navigating neighborhoods within Buenos Aires given the city's dense urban grid, though distances between major tourist zones can exceed comfortable walking range. The microcentro (historic center) measures roughly 2 by 1.5 kilometers from Casa Rosada to the Obelisco, making internal exploration on foot feasible. However, the distance from Plaza de Mayo to Palermo's botanical garden spans approximately 7.5 kilometers, requiring 90 minutes walking time. Sidewalk conditions vary significantly: Recoleta and Puerto Madero feature wide, maintained paths, while San Telmo and parts of Palermo have narrow sidewalks with uneven flagstones and frequent breaks for garage entrances. The Buenos Aires city government installed approximately 3,200 pedestrian countdown signals at intersections between 2015 and 2019, displaying remaining seconds in red before the walk signal appears. Jaywalking is common and generally unenforced, though traffic does not consistently yield to pedestrians even at marked crossings.
Avenida 9 de Julio, running north-south through the city center, holds the designation of the world's widest avenue at approximately 110 meters across including all lanes and median strips. Crossing this avenue on foot at grade level requires navigating two to three signal cycles at most intersections because pedestrian phases do not span the full width. The avenue's width results from its 1930s construction, which demolished entire city blocks to create the roadway. The Obelisco monument stands at the intersection of Avenida 9 de Julio and Avenida Corrientes, rising 67.5 meters and built in 1936 to commemorate the 400th anniversary of the first founding of Buenos Aires. This intersection serves as an informal geographic reference point for navigation and meeting, frequently cited in directions.
Buenos Aires implemented the Metrobus system starting in 2011, creating dedicated bus rapid transit lanes on major arterial roads. The system includes approximately 57 kilometers of exclusive lanes on routes including Juan B. Justo Avenue, 9 de Julio Avenue, and San Martín Avenue. Metrobus lanes are physically separated from general traffic by low concrete barriers and serve multiple colectivo routes simultaneously. Standard colectivo fares apply; passengers board at raised platforms resembling train stations with shelters and route information displays. The Juan B. Justo corridor, opened in 2011 as the first Metrobus line, reduced average journey times by approximately 40% according to city transport authority data from 2012.
The Premetro is a light rail line operating in the southern neighborhoods of Villa Soldati and Villa Lugano, serving as a feeder to Line E of the Subte at Intendente Saguier station. The 7.4-kilometer route with 17 stations opened in 1987 using tramway-style vehicles originally built by Materfer in Córdoba. Service operates from approximately 05:00 to 22:30 on weekdays with reduced weekend schedules. The same SUBE card and Subte fare of 125 pesos applies. The Premetro serves primarily residential areas with limited tourist infrastructure, making it rarely used by visitors despite its technical classification as part of the public transit network.
Ferry services cross the Río de la Plata from terminals at Puerto Madero and Dársena Norte to destinations in Uruguay. Buquebus operates high-speed catamaran services to Montevideo (approximately 2 hours 15 minutes) and Colonia del Sacramento (approximately 1 hour) from Terminal Buquebus at Dársena Norte near Retiro station. Colonia Express and Seacat similarly serve Colonia del Sacramento from terminals in Puerto Madero. These are international services requiring passport control and customs processing, not intra-city transport, but the terminals are integrated into Buenos Aires urban geography. Fares range from approximately USD 50 to USD 150 depending on route, season, and advance purchase.
Remises are private car services operating from physical offices throughout Buenos Aires neighborhoods, distinguished from taxis by lacking meters and exterior signage. Passengers telephone or visit a remis office to arrange transport, with fares quoted as fixed prices before departure based on destination. Remis services cost roughly 10-20% more than metered taxis for equivalent distances but are perceived as more secure, particularly for airport transfers or late-night travel. Major remis companies including Remises Universal and Remises Premier maintain fleets comparable in size to large taxi operations. Payment is typically cash-based, though individual agencies set their own policies regarding credit cards or digital transfers.
Airport transport to Aeroparque Jorge Newbery, located 2 kilometers north of downtown along the Río de la Plata shoreline, is served by colectivo route 45 connecting to the city center in approximately 30 minutes outside peak hours. Taxis from central Buenos Aires to Aeroparque average 20-30 minutes depending on traffic and cost approximately 3,000-4,500 pesos. Aeroparque primarily handles domestic flights and regional service to Uruguay, Chile, and Brazil. Ministro Pistarini International Airport, commonly called Ezeiza, lies approximately 35 kilometers southwest of the city center in the suburb of Ezeiza. Bus company Tienda León operates scheduled shuttle services between downtown (terminating at Avenida Madero and San Martín) and Ezeiza approximately every 30 minutes from 04:00 to 20:00, with journey time of 60-90 minutes and fares around 4,500 pesos as of 2024. Public colectivo route 8 reaches Ezeiza from Plaza de Mayo in approximately 2.5 hours for the standard SUBE fare, though service is infrequent and involves multiple transfers depending on the specific terminal. Taxis and app-based rides to Ezeiza from central Buenos Aires cost approximately 15,000-25,000 pesos depending on traffic conditions and time of day, with journey times ranging from 45 minutes at night to over 2 hours during peak periods.
Traffic congestion in Buenos Aires ranks among the most severe in Latin America based on TomTom Traffic Index data, with the city placing third in South America for 2023 after Bogotá and Lima. Average travel times increase by approximately 54% during peak hours compared to free-flow conditions according to the same index. Morning peak extends roughly from 07:30 to 10:00, while evening peak runs from 17:30 to 20:30 on weekdays. Avenida General Paz, the ring road marking the administrative boundary between autonomous Buenos Aires city and Buenos Aires province, experiences particularly heavy congestion as suburban commuters enter the city. The avenue functions as a limited-access highway but with frequent at-grade intersections and traffic signals, reducing effective capacity. Driving customs include aggressive lane changes, minimal following distances, and widespread disregard for lane markings. Horn use is frequent and employed for purposes ranging from signaling lane changes to expressing general frustration.
Parking in central Buenos Aires operates primarily through metered street spaces managed by the city government and private garages. The city implemented a zone-based digital parking payment system accessible through the BA Móvil app or physical payment kiosks on most blocks in commercial and mixed-use districts. Rates vary by zone and time, ranging from approximately 200 pesos per hour in outer neighborhoods to 500 pesos per hour in premium zones like Recoleta and Puerto Madero during weekday business hours. Enforcement occurs through patrol officers issuing tickets for expired meters or illegal parking, with fines starting around 8,000 pesos. Private parking garages charge hourly rates from 600 to 1,500 pesos depending on location and duration, with daily maximum rates often capping at 4,000-6,000 pesos. Vehicle theft and break-ins occur throughout the city; visitors should consult their accommodation about secure parking rather than leaving rental cars on streets overnight.
Navigation apps including Google Maps, Waze, and the locally developed Cómo Llego function reliably for route planning in Buenos Aires, with Cómo Llego offering the most comprehensive integration of public transport options including real-time colectivo tracking. Cell service coverage is consistent throughout the city on networks operated by Movistar, Claro, and Personal. Tourist SIM cards with prepaid data plans are available at Ezeiza airport and electronics retailers for approximately 3,000-5,000 pesos with 10-20GB data allowances valid for 30 days.
The Subte system experiences frequent service interruptions, particularly on Line A due to its aging infrastructure and ongoing modernization work. Announcements regarding delays are made in Spanish only, both in stations and on trains. Line D connects some of the most tourist-relevant stations including Catedral (near Plaza de Mayo and Casa Rosada), 9 de Julio/Carlos Pellegrini (Obelisco area), Tribunales (near Teatro Colón), and Palermo (Palermo Soho access). Line H is the newest line, opened in stages between 2007 and 2015, and operates with modern air-conditioned rolling stock contrasting with the older equipment on other lines. All Subte lines operate as independent corridors; transfers between lines require exiting to an underground corridor or street level and re-entering the connecting line, though this does not incur an additional fare if completed within a set transfer window.
Accessibility infrastructure for wheelchair users and individuals with mobility limitations remains limited across Buenos Aires transport systems. Only Line H of the Subte and select stations on other lines feature elevators and level boarding; most stations require navigating stairs without escalator alternatives. Colectivos operate low-floor buses on some routes, identified by wheelchair symbols on vehicle exteriors, but coverage is inconsistent. The city government reports approximately 30% of the bus fleet meets accessibility standards as of 2023. Commuter trains similarly offer limited accessible boarding, with platform gaps and lack of level boarding at most stations.
Bicycle theft in Buenos Aires is common despite the prevalence of the free Ecobici system. Personal bicycles should be secured with heavy-duty locks if left unattended, and even then, theft from street parking remains routine. The Ecobici bikes use a docking system requiring return to a station, which prevents theft during use but creates inconvenience if the destination station is full. The app displays real-time dock availability to help plan return locations.
Motorcycle taxis, while present in some Latin American cities, do not operate as a formal service category in Buenos Aires and are not legal for commercial passenger transport under current regulations. The informality of some transport options means visitors occasionally encounter unlicensed operators offering rides, particularly near tourist sites or transit hubs, but these carry no regulatory oversight or insurance coverage.
Tolls do not apply within the autonomous city of Buenos Aires, but accessing highways that connect to suburban areas and provinces involves automated toll plazas charging approximately 150-400 pesos per passage depending on the specific route. Rental cars may include transponders for automated payment, or tolls can be paid in cash at staffing booths.
The Buenos Aires transit experience reflects the city's economic volatility; fare amounts in pesos increase multiple times per year in line with inflation rates that reached 211% annually in 2023 according to INDEC, the national statistics institute. The SUBE card balance is denominated in pesos, meaning stored value depreciates in real terms between purchase and use during high-inflation periods. Recharge locations include kiosks throughout the city, subway stations, and some lottery outlets, identifiable by SUBE signage.
Street crime on public transport, particularly pickpocketing on crowded colectivos and Subte trains, occurs with sufficient frequency that the Buenos Aires city police maintain a dedicated transit unit. The highest-risk situations involve crowded peak-hour conditions when physical proximity provides cover for theft. Standard precautions include keeping bags closed and in front of the body, avoiding phone use while standing near doors, and remaining aware of surroundings at station exits in less-traveled areas after dark.