Cheap flights from Kastamonu to Istanbul
Cheapest current fares: $61 in August 2026, 422 km direct flight in ~30m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Kastamonu (KFS) to Istanbul (IST). Refreshed daily.
Kastamonu (KFS) → Istanbul (IST)
- August 2026 $61
Frequently asked questions
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What is the cheapest month to fly from Kastamonu to Istanbul?
Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Kastamonu (KFS) to Istanbul (IST), with fares starting from $61.
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What is the lowest current fare from KFS to IST?
The lowest currently-listed fare from Kastamonu (KFS) to Istanbul (IST) is $61 on 2026-08-07.
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How long is the flight from Kastamonu to Istanbul?
Direct flights from KFS to IST cover approximately 422 km (262 miles), with an estimated flight time of 30m. Operating airlines: TK.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.