For the cheapest flights to Sofia book 53 days before departure.
The most popular airlines on the route Basel - Sofia: Wizz Air (W6), Lufthansa (LH), Austrian (OS).
The cheapest flights are on the route Basel-Mulhouse-Freiburg Airport (BSL) - Sofia Airport (SOF).
Direct flights last about 2h 15min.
Direct flights available 2 days a week - Monday, Friday.
Direct flights: Wizz Air (W6).