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

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Boston (BOS) to Sofia (SOF), with fares starting from $395.

What is the lowest current fare from BOS to SOF?

The lowest currently-listed fare from Boston (BOS) to Sofia (SOF) is $395 on 2026-08-10.

Is there a direct flight from Boston to Sofia?

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

Cheap flights from Boston to Sofia

Cheapest current fares: $395 in August 2026 on connecting flights.

Last updated August 4, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Boston (BOS) to Sofia (SOF). Refreshed daily.

Boston (BOS) → Sofia (SOF)

August 2026 $395
December 2026 $454

Frequently asked questions

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

Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Boston (BOS) to Sofia (SOF), with fares starting from $395.
What is the lowest current fare from BOS to SOF?

The lowest currently-listed fare from Boston (BOS) to Sofia (SOF) is $395 on 2026-08-10.
Is there a direct flight from Boston to Sofia?

There is currently no non-stop service from BOS 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.