Duration of IST-20 Bus From Sultanahmet to Istanbul Airport

The duration of the IST-20 bus from Sultanahmet to Istanbul Airport is at least 1hour at no traffic. But it takes up to 2 hours(or even more) at rush hours. Also if there is an accident, special event(like football match) or even rain, going from Sultanahmet to Istanbul Airport by IST-20 bus can take 2 hours or even more. Istanbul has a terrible traffic, and the traffic is mostly unpredictable. So it would generally be safe to plan for the worst. Also, the Istanbul Airport is very big. Sometimes it takes up to 15-20minutes to reach gate by walking. We suggest you to make your plans concerning all these mentioned above.