The delays in certification have also hurt the airline, which is now set to enter the market at a tough time, says Keith McMullan of Aviation Economics, a consultancy.

• 咨询机构“航空经济学”的基斯麦克茂拉认为，审批如此缓慢，也已经损害到了维京航空，它现在不得不在严峻的气氛中迈入市场。