Just had a look. Ryanair on Sunday, Depart Prague 10:05, arrive London Stanstead 11:05, £49
Ryanair Stanstead depart 12:30 to Edinburgh arrive13:15, £55. This may be a bit tight. Two friends missed connection out to Prague due to problems going through security at Stanstead.
Better option might be to spend a few hours at Stanstead then fly Easyjet to Edinburgh departing 16:05, £56