Sofia’s urban subway system has proved to be among the most liked in Europe. The Sofia Metro was ranked the second best in Europe, surpassed only by Oslo, according to Euronews. The study was conducted by the luggage storage company Bounce, taking into account various factors such as the number of stations, connections to other major transport hubs (airports, ports), convenience, design, cleanliness, passenger flow, signs, maps, information boards, Google review score, the percentage of positive and negative online reactions to each service, etc.

The Sofia metro is praised for being welcoming, uncrowded and well-maintained, and for its direct connection to the airport. It has plenty of English language signage, including payment instructions, which makes it simple and accessible for foreign visitors.