Balkan-Bulgarian Airlines operates domestic services connecting Sofia with the coast and main towns. The journeys from Sofia to Varna and Bourgas can be made in about an hour.
Air travel is comparatively cheap, and is only slightly more expensive than rail travel.
Regular boat and hydrofoil services along the Bulgarian bank of the Danube link many centres, including Vidin, Lom, Kozloduj, Orjahovo, Nikopol, Svishtov, Tutrakan and Silistra. Bulgarian State Railways connects Sofia with main towns. Reservations are essential and first-class travel is advised. For details contact the State Railway Office. Traffic drives on the right.