Budapest has one of central Europe's most extensive and affordable urban transport networks, run by BKK (Budapesti Közlekedési Központ). Four metro lines, an enormous tram network, city buses, trolleybuses and the suburban HÉV rail all run on integrated ticketing — and fares are low enough to make the car essentially unnecessary for visitors. Here is how to navigate the system.
The metro: four lines through the city
Budapest's metro has four lines, numbered M1 through M4. Each has a distinct character:
- M1 (yellow): The oldest metro line in continental Europe, opened in 1896 and still running largely original-era engineering. It runs along Andrássy Avenue from Vörösmarty tér (near the city centre) to Mexikói út in the north-east, stopping at the Opera House and Heroes' Square. It is shallow (accessed by short staircases rather than deep escalators), runs frequently, and is a pleasure to use.
- M2 (red): The main east–west line, running from Keleti pályaudvar (Eastern Station) through the centre to Déli pályaudvar (Southern Station) and beyond to Kelenföld. Keleti is the main arrival station for international trains from Vienna, Bucharest, Prague and beyond — so most visitors will use M2 immediately on arrival.
- M3 (blue): The north–south backbone, running from Újpest-Városkapu in the north through Keleti, Kálvin tér and Kőbánya-Kispest in the south. The oldest of the Soviet-era metro lines, it underwent significant renovation in recent years.
- M4 (green): The newest line, opened in 2014, running from Kelenföld in the south-west through the centre to Keleti. It connects Kelenföld and Keleti without needing to go via the centre, which is useful for cross-city journeys.
The central interchange where M2 and M3 cross is Deák Ferenc tér — the busiest station in the system and the effective heart of the network. M1 also terminates nearby. For most visitors, Deák is the orientation point: everything in central Pest is within walking distance or one or two stops.
Metro trains run from approximately 04:30 to 23:10. Night buses replace the metro after closing.
Trams: an excellent network
Budapest's tram network is extensive and includes some of the world's longest tram routes. The most important for visitors:
- Tram 2: Runs along the Danube embankment on the Pest side, from Jászai Mari tér to Közvágóhíd, passing the Hungarian Parliament, Chain Bridge and the Great Market Hall. One of the most scenic tram rides in Europe.
- Tram 4 and 6: Run along the Nagykörút (Great Boulevard) in a continuous loop, crossing the Margaret Bridge. These are the workhorses of the inner city and run 24 hours a day.
- Tram 19 and 41: Run along the Buda embankment, connecting Batthyány tér with Kelenföld — good for exploring the Buda riverbank.
Trams 4 and 6 are worth noting specifically: they run around the clock, every day, making them the late-night lifeline when the metro is closed.
HÉV suburban rail
The HÉV is a suburban rail network with four lines reaching areas outside the city boundary. Within the city limits, standard BKK tickets are valid; beyond the city boundary you need to buy an additional ticket. Lines useful for visitors include the H5 to Szentendre (a charming Danube Bend town, about 45 minutes), and the H8 and H9 connecting to eastern suburbs. The HÉV stations in the centre are clearly signed and integrated with the metro.
Tickets and travel cards
BKK offers a range of tickets. Key options for visitors:
- Single ticket (egységes jegy): Valid for one journey in one direction without transfer. Cheap but inconvenient if you need to change lines.
- Transfer ticket (átszállójegy): Valid for a single journey with one transfer within 90 minutes on the metro (transfers between metro lines are free on a single ticket, but bus/tram requires this version).
- 24-hour travel card (24 órás jegy): Unlimited BKK travel for 24 hours from first validation. Very affordable.
- 72-hour and 7-day cards: The 72-hour card is excellent value for a 3-day visit; the 7-day card suits longer stays or if you want to travel out to Szentendre on the HÉV within the city limit. Both cover unlimited travel on all BKK services.
- Budapest Card: Combines unlimited public transport with free or discounted museum entry and other perks. Compare against individual entry prices to see if it makes sense for your itinerary.
Tickets are sold at orange BKK vending machines in metro stations, at some tram stops, at newsagent kiosks (újságos) and on the BKK app. Validate paper tickets immediately on entering a station or boarding a tram or bus — stamp them in the orange validators. Metro gate validators accept cards and paper tickets alike. Inspectors are active on the system and spot-checks are common; the fine for an unvalidated ticket is steep.
Validate before you board: On trams and buses, validate your ticket in the orange machine on board as you enter. On the metro, the gate does this for you. Holding a ticket without validating it counts as travelling without a ticket.
Crossing between Buda and Pest
The Danube divides Budapest into its two historic halves. Metro M2 crosses under the river between Batthyány tér (Buda) and Kossuth Lajos tér (Pest) in about 2 minutes. Tram 2 and several bus routes cross via bridges. The most famous crossing is the Chain Bridge (Széchenyi Lánchíd), which connects Clark Ádám tér in Buda to Roosevelt tér in Pest — it is worth walking at least once, though there is no tram on it.
The Castle Hill area in Buda is reached by funicular from Clark Ádám tér (separate ticket, not on BKK), or by a short uphill walk. Several bus routes also serve Castle Hill.
Practical tips
- Andrássy Avenue — running from Deák tér to Heroes' Square — is a UNESCO World Heritage Site and lovely to walk. Tram M1 runs alongside it for when your feet give out.
- The Great Market Hall is at the southern end of the Váci utca pedestrian street, a short walk from the Fővám tér tram stop (trams 2, 47, 49).
- Thermal baths are a Budapest institution. The Széchenyi Baths are near Széchenyi fürdő on M1; the Gellért Baths are on the Buda bank near Gellért tér (trams 19, 41, 47, 49).
- Night transport after metro closing: Trams 4 and 6 run all night. Several night bus routes (labelled with an N prefix) cover other corridors.
Budapest is also a key hub for central European rail travel, with direct trains to Vienna, Prague, Bucharest and Belgrade. Keleti station (served by M2 and M4) is the main arrival and departure point for most international services.
Frequently asked questions
What is the oldest metro line in Europe?
The M1 (yellow line) in Budapest, which opened in 1896, is often cited as the oldest underground metro line on the European continent. It still runs largely along its original shallow-bore route under Andrássy Avenue.
How do I get from Keleti station to the city centre?
Keleti pályaudvar is directly served by Metro M2 (red) and M4 (green). Take M2 two stops west to Deák Ferenc tér for the very centre, or use M4 for connections to the south-west of the city.
Is there 24-hour public transport in Budapest?
Not full metro service — the metro runs from around 04:30 to 23:10. However, Trams 4 and 6 run around the clock, and night bus routes (N-prefix) cover other corridors through the night.
Do BKK tickets work on the HÉV suburban rail?
Within the city boundary, yes — standard BKK tickets and passes are valid. Beyond the city limit, you need to purchase an additional HÉV supplement ticket for the extra distance.
Sources and further reading:
- BKK network maps, timetables and tickets: BKK (bkk.hu).
- Budapest Card: Budapest Info (budapestinfo.hu).
- HÉV routes: BKK (the HÉV is now operated under the BKK umbrella).
- International rail connections: The Man in Seat 61.