What is the cheapest month to fly from Bilbao to Sofia?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Bilbao (BIO) to Sofia (SOF), with fares starting from $74.

What is the lowest current fare from BIO to SOF?

The lowest currently-listed fare from Bilbao (BIO) to Sofia (SOF) is $74 on 2026-09-05.

Is there a direct flight from Bilbao to Sofia?

There is currently no non-stop service from BIO to SOF. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Bilbao to Sofia

Cheapest current fares: $74 in September 2026 on connecting flights.

Last updated August 4, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Bilbao (BIO) to Sofia (SOF). Refreshed daily.

Bilbao (BIO) → Sofia (SOF)

September 2026 $74

Frequently asked questions

What is the cheapest month to fly from Bilbao to Sofia?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Bilbao (BIO) to Sofia (SOF), with fares starting from $74.
What is the lowest current fare from BIO to SOF?

The lowest currently-listed fare from Bilbao (BIO) to Sofia (SOF) is $74 on 2026-09-05.
Is there a direct flight from Bilbao to Sofia?

There is currently no non-stop service from BIO to SOF. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.