The four international airports in the country (Sofia, Plovdiv, Varna and Bourgas) are serviced by airplanes of a Bulgarian or respective foreign company. Regular lines of air connection are now operable between Sofia, Plovdiv, Varna and Bourgas, whereby the flights are several a day in high season. One-way flight ticket costs around 50 US dollars.
Moreover, foreign travellers can approach and enter the country using railway transports via border crossing points at Kalotina (from the west), Vidin (by means of the ferry on the Danube there), Rousse (from north), the Kulata border point (for those coming up from Greece), Svilengrad (from Turkey).
Arriving or crossing Bulgaria’s territory are multiple international express and through trains. Prices of the BDZh-run (Bulgarian State Railways) railway tickets vary between 2-3 BGL per one hundred kilometres trip, depending on the category of the passenger carriage (first or second class tickets).
Foreign travellers can by tickets at international railway bureaus (railway travel agency offices) in the town of departure, at the booking office of the railway station in the respective town, or in international travel agencies.
The country is also accessible for drivers along land routes across the border from Serbia and Montenegro, and Turkey, using the first category international highway E 80 via Kalotina and Svilengrad; from Rumania along highway E 79 at Vidin, highway E 85 at Rousse, and highway E 87 at Dourankoulak; from Macedonia at Gyueshevo riding along highway E 871; and from Koulata following route E 79. A network of motorways, first, second and third category highways covers the interior of the country, with all of them, except for the third category roads, have asphalt pavements.
All towns in the country and more often visited holiday and recreation resorts are serviced by regular bus-lines. Prices of tickets per one hundred kilo metre long travels vary between 5 to 7 BGL. Sofia is the point of departure for bus services on a number of international destinations running along routes to the large European cities, and across Turkey to some of the Middle East countries. Travellers can buy tickets for the international destinations in the specialised travel agencies and their booking offices at the bus terminals. Some international travel agencies also offer in- and outgoing bus services.
Foreign car tourists should take particular care in their winter trips and rides in highland terrains to avoid being surprised by road accidents and whatsoever contingencies. Helpful information, in this respect, can be provided at hotels and by professional drivers servicing them, or you can fmd it readily available in the daily press. Fees have been introduced and paid on entry and for the rides on highways throughout the country. Every larger inhabited locality has paid parking lots that charge 1-2 lev per hour. Petrol stations to refuel your car on motorways, first and second-class highways are available on 30-50 km intervals, with pricing close to the one in Europe. Car rentals are available at large hotels, too.
Border crossing points on waterways are at Vidin, Lorn, Rousse and Silistra on the Danube River, and similar locations for arrivals and departures by sea, are to be found at Varna and Bourgas at the Black sea coast.
Prices for using river and sea means of transport vary both between each other and in strong dependence of the season, but are nonetheless bearable for any sort of tourists. Private owners of boats, yachts and motorboats provide services to make feasible alluring sightseeing tours around the coastline or just to go out boating.