The Spanish Red Cross and Vueling has sent a shipment of more than 8,000kg of aid from Barcelona to Gaziantep, and SunExpress has so far carried out 236 relief flights.
The humanitarian flight operated by Vueling took off last week, carrying a cargo of tents and containers of water.
Sandra Hors, chief communications officer of Vueling, said: "At Vueling, we are always available to help the most vulnerable groups and to respond to emergencies such as the one caused by this earthquake.
"The entire company has been involved in this shipment, hoping to do our bit to support the people going through this situation."