Sofia (SOF)Vienna (VIE)
- non-stop flights:
- 2–6 per day
- flight duration:
- at least
direct flight availability- Sun
- Mon
- Tue
- Wed
- Thu
- Fri
- Sat
airlinesfrom $133number of non-stop flights per airline and day of the week Sun Mon Tue Wed Thu Fri Sat 
3–4 2–4 3–4 3–4 3–4 1–4 3–4 
1–2 1 1 1–2 1–2 1–2 1–2 Varna (VAR)Vienna (VIE)
- non-stop flights:
- 1–2 per day
- flight duration:
- at least
direct flight availability- Sun
- Mon
- Tue
- Wed
- Thu
- Fri
- Sat
airlinesfrom $55number of non-stop flights per airline and day of the week Sun Mon Tue Wed Thu Fri Sat 
1–2 1–2 1–2 1–2 1–2 1–2 1–2 Burgas (BOJ)Vienna (VIE)
- non-stop flights:
- 1–3 per day
- flight duration:
- at least
direct flight availability- Sun
- Mon
- Tue
- Wed
- Thu
- Fri
- Sat
airlinesfrom $87number of non-stop flights per airline and day of the week Sun Mon Tue Wed Thu Fri Sat 
0 1 0 1 1 1 1 
1 0 1 0 1 0 0 
1 0 1 0 1 0 0