Kastamonu → Istanbul flights
Last observed price · Last checked: 24 Aug 2026 · Price may change
Short answer
The lowest fare our own searches returned is €88, seen on 24 Aug 2026. October 2026 is the cheapest month in our observations, at €88. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.
Tickets found in the last 7 days
The lowest fares our queries caught, cheapest first.
Starting prices by month
The lowest fare our queries observed in each month. Open a month to see its days; click a day with no price and we will search it for you.
Route facts
Frequently asked
How much is a flight from Kastamonu to Istanbul?+−
The lowest fare we have observed is €88, found on 24 Aug 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Kastamonu to Istanbul?+−
In our observations October 2026 is the cheapest month so far, at €88.
We will email you when this route drops below €79.
Similar routes
More routes from Kastamonu
More routes to Istanbul
Last checked: 24 Aug 2026