https://community.ring.com/conversations/welcome-to-the-ring-community/laflywhich-days-are-cheapest-to-fly-lufthansa/67df25afb7ace50024032263
https://community.ring.com/conversations/welcome-to-the-ring-community/laflywhich-days-are-cheapest-to-fly-lufthansa/67df25afb7ace50024032263