Cheap flights from Kos to Sofia

Cheapest current fares: $149 in August 2026 on connecting flights.

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Live fares · KGS → SOF

Cheapest month-by-month fares

Lowest available fare per calendar month from Kos (KGS) to Sofia (SOF). Refreshed daily.

Kos (KGS) → Sofia (SOF)

  1. August 2026 $149

Frequently asked questions

  • What is the cheapest month to fly from Kos to Sofia?

    Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Kos (KGS) to Sofia (SOF), with fares starting from $149.

  • What is the lowest current fare from KGS to SOF?

    The lowest currently-listed fare from Kos (KGS) to Sofia (SOF) is $149 on 2026-08-28.

  • Is there a direct flight from Kos to Sofia?

    There is currently no non-stop service from KGS 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.

Full route page: KGS → SOF Cheapest month to fly to Sofia All flights from Kos All flights to Sofia Flights to Bulgaria Visa-free with Greece passport