Cheap flights from Kastamonu to Istanbul

One-way fares from $40 · KFS → IST · prices found by travellers in the last 48 hours

Compare all dates Istanbul → Kastamonu
Cheapest fare
$40

Turkish Airlines · Wed, Dec 30

Cheapest month
December

from $40

Direct flights
Yes

Turkish Airlines

Flight time
1h 30m

400 km

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Cheapest month to fly from Kastamonu to Istanbul

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $46
  2. December 2026 Cheapest $40

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

Turkish Airlines
Depart16:05 Wed, Dec 30KFS → IST 1h 30m · Direct
$40one way, per person
View deal
See every date in December 2026 →

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Getting around

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About flights from Kastamonu to Istanbul

Kastamonu (KFS) and Istanbul (IST) are about 400 km apart. Direct flights take around 1h 30m, and recent direct fares were with Turkish Airlines. Over the next few months, one-way fares start from $40, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Kastamonu to Istanbul?

The cheapest one-way fare we've seen recently is $40 with Turkish Airlines, departing Wednesday, December 30, 2026. Over the coming months, the lowest fare in each month ranges from $40 to $46.

What is the cheapest month to fly from Kastamonu to Istanbul?

December 2026 currently has the lowest fares, from $40 one way.

Are there direct flights from Kastamonu to Istanbul?

Yes. Recent direct fares were with Turkish Airlines.

How long is the flight from Kastamonu to Istanbul?

A direct flight takes about 1h 30m. Kastamonu and Istanbul are around 400 km apart.

Which airlines fly from Kastamonu to Istanbul?

Recent fares on this route were with Turkish Airlines.

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