No group claimed responsibility for the triple bombing at the airport but Turkey maintains it was the work of Islamic State militants. It was one of several attacks blamed on the group in Turkey that year. The six defendants were sentenced to life in prison without parole after they were found guilty of murder and of attempting to destroy Turkey's constitutional order, Anadolu said.
A total of 46 people were tried over the attack on terror-related charges including membership of an armed terrorist organization and forming and running a terror group, the news agency said.
It did not give details of other verdicts and sentences handed to the defendants but said 16 of them were Russian nationals, while the others were Chechen, Tunisian, Egyptian, Algerian, Syrian and Turkish citizens.