The airport is a key location in the government's bid to drive IS militants from Iraq's second city.
The meeting marks the first UN-backed talks between the government and opposition in nearly a year.
Turkish-backed forces besieging the town of al-Bab have reached the centre, Turkey says.
One woman's escape from 'Islamic State' in Raqqa
Rising risk of showdown between Trump and Iran
What does new ruling mean for Lebanon's LGBT community?
Why battle for Mosul will be toughest fight yet
Possible alternatives to a two-state solution in the Middle East
What Trump's new approach means for Mid-East peace
Broadcast time 14:06 GMT - 15:00 GMT
Broadcast time 16:06 GMT - 17:00 GMT
Broadcast time 18:06 GMT - 18:30 GMT
Broadcast time 19:06 GMT - 19:30 GMT