The only app that works on my Nexus 5. I have tried uncountable number of apps and only this worked. 5 stars absolutely deserved! Go further and improve it(change the icon - it's ugly)!
Force reboot after installation
//BE CAREFUL, we must reboot your device to finish correctly the installation//
From 4.2.x, root privilieges are needed to enable/disable airplane mode.
From 4.3, this application must be copied into system folder to enable/disable airplane mode. that's why reboot is necessary after finishing installation.