The metro connection to the airport
Sofia's metro network extends to Sofia Airport via Line M4, and the ride into the city center takes about 20 minutes, with a change at Serdika station getting you to the Central Bus Station or the main railway station in under 30 minutes total. This is one of the more useful pieces of the city's public transport system for visitors, since it removes the need to negotiate a taxi fare or navigate a bus route straight off a flight.
Taxis are also available at the terminal, and as with many capital city airports, using an officially licensed rank or a reputable app-based service rather than accepting an unsolicited offer inside the terminal is the safer default.
How Sofia's transport tickets generally work
Sofia's public transport — metro, bus and tram — typically runs on an integrated fare system, where standard ticket types cover travel across modes rather than requiring a separate ticket for each. Common ticket categories in cities structured this way usually include a single-ride ticket, a ticket with a transfer allowance, and unlimited day or multi-day passes aimed at visitors staying for more than a day or two. Per Metropolitan's current fare page, a single ticket without transfer costs €0.80 (1.86 BGN) and is valid for 60 minutes, a ticket with a 30-minute transfer allowance also costs €0.80, and a 60-minute transfer ticket costs €1.10 (2.15 BGN). A one-day card costs €2, a 24-hour card €3 (including night transport), and a 72-hour card €7.60 (including night transport). This guide could not confirm exact ticket-purchase methods (contactless card readers, ticket machines, kiosks, or a mobile app) for every station, so ask at a metro station ticket booth on arrival if a machine isn't obvious.
Getting to Plovdiv, Varna or Burgas: bus versus train
Bulgaria has both a national rail operator, BDŽ (Bulgarian State Railways), and a competitive private intercity bus market connecting Sofia with the country's other major cities, including Plovdiv, Varna and Burgas. In general, private coach operators tend to offer more frequent departures and, on several key routes, shorter journey times than BDŽ's rail network, which runs on infrastructure that in many stretches has not been substantially upgraded for high-speed travel. This guide could not verify a specific current journey-time comparison for any one route, so if timing is important to your plan, compare both options directly for your exact travel date rather than assuming the bus is always faster.
Buses depart from Sofia's central bus station area, generally close to the main railway station, making it straightforward to compare ticket counters or booking sites for both modes before deciding.
Comparing your options
| Option | Best for | Trade-off |
|---|---|---|
| Metro (airport to city) | A direct, traffic-independent arrival route | Specific fare and frequency need confirming on the day |
| Intercity bus | Plovdiv, Varna, Burgas with more frequent departures | Comfort and legroom vary by operator |
| BDŽ train | Travellers who prefer rail regardless of speed | Generally slower than the bus on most of these routes |
Booking intercity travel ahead versus on the day
Bulgarian intercity bus operators generally allow booking through their own websites or, for some routes, through third-party aggregator sites, and reserving a seat ahead of a summer weekend departure to the Black Sea coast is a reasonable precaution given how much domestic and international tourist traffic that corridor carries in peak season. BDŽ train tickets can typically be bought at station counters or through the operator's own booking channels, and on less frequent routes, checking the timetable a day or more ahead rather than showing up expecting a departure within the hour is the safer approach.
If your itinerary includes more than one intercity leg, comparing the full set of options — which bus operators serve your route, and whether BDŽ offers a competitive or simply slower alternative — before your trip, rather than deciding at the station, generally saves both time and money.
Before you rely on a specific schedule
This guide describes the general shape of Sofia's transport options rather than confirmed current fares, frequencies or journey times, none of which were verified through official sources for this piece. Check Sofia's metro and public transport authority for airport-line specifics, and compare BDŽ's and the relevant intercity bus operators' current timetables directly before booking either for a Plovdiv, Varna or Burgas trip.