Sofia scores 78/100 for Connectivity for Business Travelers. International Airport Connectivity (26/30): Sofia International Airport (SOF) demonstrates strong connectivity with direct flights to over 100 destinations across Europe, the Middle East, and seasonal routes to North America and Asia. Multiple daily flights connect to major European hubs including London, Frankfurt, Paris, Amsterdam, Vienna, and Istanbul through both low-cost carriers (Wizz Air, Ryanair) and traditional airlines (Lufthansa, Austrian Airlines, Bulgaria Air). The airport is located just 10km from the city center with metro Line M4 providing 30-minute access. Recent terminal expansions ensure efficient immigration processing (30-45 minutes). However, limited intercontinental direct flights compared to major European capitals prevent a higher score. Domestic Airport and Rail Connectivity (18/25): Sofia Central Railway Station serves as Bulgaria's primary railway junction with connections to major domestic destinations (Plovdiv, Varna, Burgas, Ruse) and international routes to Belgrade, Bucharest, and Istanbul. The station integrates well with metro Lines 1 and 4, located 1.5km from city center. However, Bulgaria's compact size limits domestic air travel demand, and rail infrastructure modernization is ongoing with fewer high-speed options compared to Western European standards. Journey times are moderate (2.5 hours to Plovdiv). Public Transportation Systems (20/25): Sofia offers a comprehensive and affordable public transportation network including four metro lines with ongoing expansions, extensive bus, trolleybus, and tram networks connecting all major districts. The metro is modern, air-conditioned, and features bilingual signage (Bulgarian/English). Integrated ticketing system with single-ride tickets, day passes, and rechargeable cards works across all transit modes. Operating hours are 5:00 AM to midnight with select night bus services. Metro Line 1 directly connects the airport. The system provides reliable access to conference centers, hotels, and cultural venues. Alternative Transportation Options (14/20): Sofia provides diverse informal transportation including abundant taxis, ride-hailing apps (Bolt, Uber) with cashless payments, bike-sharing programs (Sofia Bike with electric and traditional bicycles), electric scooter rentals (Lime, Bird) in central areas, informal shared taxis (marshrutkas) on fixed routes, and private minivan transfers. The city center is largely pedestrianized around Vitosha Boulevard with well-maintained sidewalks and pedestrian zones, though outlying areas show less consistent infrastructure. The variety of options is good but could benefit from expanded coverage areas.