Sabiha Gökçen Airport, which is the gateway of the Anatolian side of Istanbul to the world, is only 60 kilometers away from Kocaeli. Those flying to Istanbul from all over the world and Turkey can reach Kocaeli via the "Bus Terminal-Sabiha Gökçen Airport" lines operated by Kocaeli Metropolitan Municipality.

There are also private flights from Cengiz Topel Airport in Kocaeli.