From Sofia Airport you can take the Metro Line (Terminal 2) to the Central Bus and Train Station in the center of the city. The journey is around 30-40 minutes. Alternatively, you can take a taxi ( around 8-10€).
In Bulgaria you have to pay everywhere in Bulgarian Lewa (Lew is the national currency). Bulgaria is part of the EU but not part of the monetary union.
Just note! Varshets is the nearest town to Bela Rechka (8km). If you go on a bus from Sofia to Varshets, after that you need to take a taxi or somebody to pick you up to Bela Rechka.
If you go first on the train from Sofia to Lakatnik and after that on the bus to Varshets – the bus will take you directly to Gorna Bela Rechka and after that goes to Varshets (you just ask for Gorna Bela Rechka and do not go to Varshets!).
Varshets – Sofia
Bus: 07.30 from Varshets bus station via Vratsa, arrives at 10.00 at Sofia Central Bus Station (NOT traveling on Sundays)
Bus: 13.00 from Varshets bus station via Berkovitsa; arrives at 16.00 of Central Bus Station Sofia
Bus from the bus station at 07.00 (traveling ONLY on Tuesdays and Saturdays), train 08.36 arrives at 9.30
Bus from the bus station at 15.00 (traveling ONLY on Fridays and Sundays), train 16.38 arrives at 17.50
Sofia – Varshets
Bus: 08.30 from the Central Bus Station, via Vratsa. Arrives at 11.10 (NOT traveling on Sundays)
Bus: 13.00 from Central Bus Station, via Petrohan. Arrives at 15.10
Bus: 14.00 from Central Bus Station, via Vratsa. Arrives 16.50 (NOT traveling on Sundays)
Bus: 17.30 from the Central Bus Station through Berkovitsa. Arrives 19.40
Through Lakatnik (train & bus):
Train 08.20 from Central Railway Station, arrives at 9.32, bus at 9.40, arrives at 10.45
(NOTE! travels ONLY on Tuesdays and Saturdays)
Train 17.00 from Central Railway Station, arrives at 17.53, bus at 18.05, arrives at 19.10
(NOTE! travels ONLY on Fridays and Sundays), (the bus is waiting for the train!)
Varshets – Vratsa
Bus: 7.30; 15.00 (not traveling on Sundays) from Varshets Bus Station (45 minutes travel)
Vratsa – Varshets
Bus: 10.30; 16.10 (not traveling on Sundays) from the Bus station (travels 45 minutes).