$309 Cheap Flights from Istanbul (IST) to Grenoble (GNB)

View $309 flight on Sun, Dec 14, 2025Opens in a new window

Popular airlines from Istanbul Airport (IST) to Grenoble (GNB-Grenoble - Isere)

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Cheap Flights from Istanbul to Grenoble (IST-GNB)

Prices were available within the past 7 days and start at $309 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alternative airports near Grenoble

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Saint-Exupery LYS. Cheapest option available. Average driving time to city center is 57 minutes. Flights from $292
LYS
Saint-Exupery
Cheapest
Average driving time to city center57 min
Flights from $292
Flights from Istanbul (IST) to Grenoble (GNB)
Origin airport
Istanbul
Destination airport
Grenoble - Isere
Distance
1205 mi

Istanbul to Grenoble Flights

The cheapest times to fly from Istanbul to Grenoble

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 Istanbul to Grenoble are during the month of . You can find some of the cheapest flights from Istanbul to Grenoble with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Istanbul to Grenoble

Sunday is one of the best days to book for cheap flights from Istanbul to Grenoble: 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 Istanbul to Grenoble

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 Istanbul to Grenoble in 2025. You can also book with separate airlines for your outbound and return journeys, from $309 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 Istanbul to Grenoble 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 Istanbul to Grenoble 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 Istanbul (IST) to Grenoble - Isere Airport (GNB) cost?
Snag a cheap one-way flight from $309 or cheap return flight from Istanbul (IST) to Grenoble - Isere Airport (GNB) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Istanbul (IST) to Grenoble - Isere Airport (GNB)?
The cheapest month to fly from IST to GNB is , when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Istanbul (IST) to Grenoble - Isere Airport (GNB)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IST to GNB flight.
How many flights per day from Istanbul (IST) to Grenoble - Isere Airport (GNB)?
Direct flights from Istanbul (IST) to Grenoble - Isere Airport (GNB) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IST to GNB?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Istanbul (IST) to Grenoble - Isere Airport (GNB)?
Book a flight from Istanbul (IST) to Grenoble - Isere Airport (GNB) that takes off before 3 PM to reduce the risk of cancellations. Later departures 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 Istanbul (IST) to Grenoble - Isere Airport (GNB) last-minute?
Last-minute bookings from IST to GNB are typically more expensive. To secure the best prices, start looking for flights as early as possible. That being said, if you can play around with your travel dates, it's possible to find a cheap ticket just before your departure.
Is it cheaper to book an IST to GNB flight and hotel package?
Compared with arranging hotels and flights separately, booking an IST to GNB flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Istanbul (IST) to Grenoble - Isere Airport (GNB)?
In most cases, you're able to reschedule or cancel your IST to GNB flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.