Mitiga was the only functioning airport in the Libyan capital, Tripoli, which is controlled by the Government of National Accord (GNA).
The airport came under attack by the Libyan National Army (LNA), which is commanded by Khalifa Haftar.
Libya has been beset by heightened violence since April, as forces loyal to General Khalifa, holding eastern Libya, attempt to take over Tripoli from GNA forces allied to UN-recognized Prime Minister Fayez al-Sarra.
Mitiga airport was also forced to suspend operations on two occasions last month after being targeted by air strikes.
The North African country has been dogged by violence since 2011, following the ouster and death of former president Muammar Gaddafi.
The war has killed thousands and displaced millions as militant groups and human trafficking cells seek to impose their command in various regions across the country.
The UN has led calls for dialogue between the warring factions in order to stop the war and put the country on a recovery path.