Istanbul to Kastamonu flights

Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Istanbul to Kastamonu is €33 (checked on 21 Oct 2026).

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Lowest observed

€33

Average observed

€43

Cheapest month

January 2027

Last checked

23 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €33

Lowest observed

6 Jan 2027

One way

Cheapest observed day · Last checked: 21 Oct 2026

When to fly

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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.

One-way fare

One-way fare · No data: click and we will search

Lowest observed: €33, departing 6 Jan 2027 (Last checked: 21 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 43Check live prices for this route
Airlines seen: Turkish Airlines
Reported fastest flight: 1h 15m
Non-stop: Yes

Short answer

Routavio has seen Turkish Airlines fares from Istanbul to Kastamonu, non-stop. The lowest fare Routavio's own searches returned is €33, seen on 21 Oct 2026. The average across the fares we caught is €43. January 2027 is the cheapest month in our observations, at €33. These are prices Routavio's searches returned on the dates shown, not quotes; run a live search for today's fare.

About this route

Explore the fares we observed from Istanbul to Kastamonu. Prices move often, so pick your dates to see the latest options.

Route distance: 404 km
Reported fastest flight: 1h 15m
Alternative airports: SAW

Route-level information; individual journeys vary.
Published schedules report non-stop service with Turkish Airlines. Check current timetables.

A clearer picture of your fare

Observed, not guaranteed

Every price is a fare we actually saw, and it may change at any time.

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How our prices work

Price alert

Price alert for Istanbul → Kastamonu

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Non-stop airlines seen on this route

Non-stop airlines seen on this route
Airline	Non-stop days / priced days	Fastest non-stop
Turkish Airlines	33 / 45

Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.

Airport to city: straight-line distance

Sabiha Gökçen Airport (SAW) → Istanbul, city gazetteer reference point (41.0082, 28.9784): ≈ 30 km.
Istanbul Airport (IST) → Istanbul, city gazetteer reference point (41.0082, 28.9784): ≈ 35 km.
Kastamonu Airport (KFS) → Kastamonu, city gazetteer reference point (41.3766, 33.7765): ≈ 7 km.

Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.

Lowest fare by departure month

Cheapest month from Istanbul to Kastamonu: January 2027, from €33 (checked 21 Oct 2026).

Lowest fare by departure month
Month	Lowest fare	Priced days
October 2026	€47	3
November 2026	€35	12
December 2026	€37	13
January 2027	€33	12

Lowest fare by day of the week

Cheapest day of the week from Istanbul to Kastamonu: Wednesday, from €33 (checked 21 Oct 2026).

Lowest fare by day of the week
Day	Lowest fare	Priced days
Wednesday	€33	14
Friday	€33	13
Sunday	€33	15

One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.

Lowest fare by days before departure

Lowest fare from Istanbul to Kastamonu by days until departure (61 days or more): €33 (checked 21 Oct 2026).

Lowest fare by days before departure
Days before departure	Lowest fare	Priced days
0 to 7 days	€47	3
8 to 30 days	€35	9
31 to 60 days	€37	12
61 days or more	€33	19

One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.

Fares for different departure dates, checked now; not a guide to when to book.

Frequently asked

How much is a flight from Istanbul to Kastamonu?

The lowest fare Routavio has observed is €33, found on 21 Oct 2026. Prices move, so read it as a floor rather than a quote.

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

Cheapest month from Istanbul to Kastamonu: January 2027, from €33 (checked 21 Oct 2026).

Are there direct flights from Istanbul to Kastamonu?

Yes. Published schedules report non-stop flights on this route with Turkish Airlines.

Which airlines fly from Istanbul to Kastamonu?

Routavio has seen these carriers on the route: Turkish Airlines.

How long does the flight from Istanbul to Kastamonu take?

Across the 16 fares Routavio observed, the average journey time is 1h 18m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.

How many of the observed Istanbul to Kastamonu fares were non-stop?

20 of the 20 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.

Which airlines had non-stop offers on at least 3 departure dates from Istanbul to Kastamonu?

For Istanbul to Kastamonu, examples of observed one-way non-stop offers checked within the last 14 days: Turkish Airlines (33). Each number counts distinct departure dates, not weekly flights; check current availability in search.

Which day of the week is cheapest from Istanbul to Kastamonu?

Cheapest day of the week from Istanbul to Kastamonu: Wednesday, from €33 (checked 21 Oct 2026).

How observed prices work, what "No data" means and what a fare includes: Read the flight price guide