To claim €20 discount please follow this link then use below promotion code during your booking process.
This Vueling discount code is possible to use on flights departing from various airports in Germany to any destination within Spain served by Vueling. Vueling flies from Berlin, Düsseldorf, Dortmund, Frankfurt am Main, Hannover, Hamburg, Nürnberg, Stuttgart, Munich and Dresden. This voucher code has to be claimed at least 20 days prior your intended flight. Enjoy this promotion with Vueling!