Quantum links have been demonstrated using satellite and fiber. Here, we propose a new type of quantum link using drones, for mobile connections with high flexibility. We demonstrate the first drone-based entanglement distribution, to work in multi-weather conditions including daytime and rainy nights. Moreover, we show that the drones node can be interconnected in air, to form an optical relay against the diffraction loss, and extend the link distances. Such mobile quantum links can be built in different scales for broad and extensive quantum coverage.