Route guide

Istanbul to Kastamonu (IST-KFS): Nonstop Upgrade & Award Space

Turkish Airlines flies the IST to KFS nonstop about 4 times a week. That's enough service to give you a real choice of departures, though premium seats don't sit unclaimed for long. 2LNR watches every IST to KFS departure for confirmed upgrade and award space and can alert you when a date you're tracking opens up.

Data current as of July 21, 2026, refreshed on an ongoing basis as new schedules and seats are confirmed.

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4
Nonstop flights a week
259 mi
Nonstop distance
Free
To get started

Confirmed upgrade & award space on every IST to KFS departure

2LNR tracks confirmed upgrade and award availability on American, Delta, and Alaska and across 30 airlines, segment by segment, date by date. Open the calendar for Istanbul to Kastamonu to see which departures have real space, or watch the route and get alerted when space opens.

See real availability

Confirmed upgrade and award seats on each IST to KFS departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See IST to KFS on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Istanbul to Kastamonu nonstop

Carriers operating IST to KFS nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

  • Turkish Airlines
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Frequently asked questions about IST to KFS

How far is Kastamonu from Istanbul?
IST to KFS covers about 259 miles nonstop. Flight times vary by aircraft and season; each scheduled departure on this page lists its own times.
Which airlines fly nonstop from IST to KFS?
Turkish Airlines is currently the only airline flying IST to KFS nonstop. 2LNR tracks confirmed upgrade and award space on every Turkish Airlines departure.
How many flights a week are there from IST to KFS?
About 4 nonstop flights a week run between Istanbul and Kastamonu in the current schedule, operated by Turkish Airlines. Frequency shifts by season; the calendar on this page reflects what's currently scheduled.
How do I check upgrade or award availability on IST to KFS?
Open the IST to KFS calendar on this page to see confirmed upgrade and award space by date. You can also set an alert on the Istanbul to Kastamonu route, and 2LNR will notify you when space opens. It's free to start.

Never miss IST to KFS upgrade or award space

Track confirmed availability, set alerts, and book with confidence. Free to start, no credit card required.

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