Istanbul and Keflavik Time Zone Comparison
The distance between Istanbul and Keflavik is felt not just in kilometers, but in time zones too. Keflavik is in Europe, while Istanbul sits in the Middle East.
Keflavik is always 3 hours behind Istanbul, with no seasonal change, since neither city's daylight saving rules shift this relationship.
With a moderate gap like this, it's worth checking the suggested call window above before scheduling a meeting between Istanbul and Keflavik.