Ryanair = cheap prices , little cramp seats. But then again iff u pay low prices u cannot expect luxuary can u?? And Ryanair has most on time flights.
I fly Ryanair from Oslo(Torp) – Liverpool(John Lennon),
and have had no issues with them at all. Go Ryanair

Norwegian = donno nothing about them, never flew with em.
But they are cheaper then SAS.