$280 Cheap Flights from Kastamonu (KFS) to Istanbul (IST)

View $280 flight on Wed, Jul 23, 2025Opens in a new window

Popular airlines from Kastamonu (KFS) to Istanbul Airport (IST)

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Cheap Flights from Kastamonu to Istanbul (KFS-IST)

Prices were available within the past 7 days and start at $280 for one-way flights and $537 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Turkish Airlines
Sat, Jul 5 - Mon, Jul 7
KFS
Kastamonu
IST
Istanbul
$537 Roundtrip, found 6 days ago
$537
Roundtrip
found 6 days ago
Select Turkish Airlines flight, departing Sat, Jul 5 from Kastamonu to Istanbul, returning Mon, Jul 7, priced at $537 found 6 days ago
Flights from Kastamonu (KFS) to Istanbul (IST)
Origin airport
Kastamonu
Destination airport
Istanbul
Roundtrip price
$537
Distance
262 mi
Average flight time
1 hour 25 mins

Kastamonu to Istanbul Flights

The cheapest times to fly from Kastamonu to Istanbul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kastamonu to Istanbul are during the month of July. You can find some of the cheapest flights from Kastamonu to Istanbul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kastamonu to Istanbul

Sunday is one of the best days to book for cheap flights from Kastamonu to Istanbul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kastamonu to Istanbul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kastamonu to Istanbul in 2025. You can also book with separate airlines for your outbound and return journeys, from $280 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kastamonu to Istanbul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kastamonu to Istanbul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kastamonu Airport (KFS) to Istanbul (IST) cost?
Cheap return flights from Kastamonu Airport (KFS) to Istanbul (IST) start from $537. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Turkish Airlines flight leaving KFS on July 5 2025 and touching down at IST. The price was last updated on June 26 2025 and has not changed since.
What is the cheapest month to fly from KFS to IST?
The cheapest flights from KFS to IST are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from KFS to IST?
Right now, the cheapest airline offering one-way flights from KFS to IST is Turkish Airlines. You can take off on this route from $280. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from KFS on July 1 2025. Prices were last updated on June 26 2025 and have not changed since.
How many flights per day from Kastamonu Airport (KFS) to Istanbul (IST)?
There aren't any daily nonstop flights from Kastamonu Airport (KFS) to Istanbul (IST). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from KFS to IST?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kastamonu Airport (KFS) to Istanbul (IST)?
Select a flight from Kastamonu Airport (KFS) to Istanbul (IST) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kastamonu Airport (KFS) to Istanbul (IST) last-minute?
Last-minute fares from KFS to IST are usually more expensive. For the lowest prices, start searching for flights well in advance. That said, if you're flexible with your travel plans, you may find a cheap ticket right before you leave.
Can I cancel or change the date of my flight from Kastamonu Airport (KFS) to Istanbul (IST)?
Usually, it's possible to cancel or reschedule your KFS to IST flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.