Arguably , some airlines are more interested in selling reward miles to third parties , such as banks , who can distribute the miles as rewards to their own customers . Recent studies show 40 % of passengers never received flight miles . Many airlines do n't have frequent flyer service as a business model . Air France - KLM seen as one of the best , partnering with Boeing .
Recent studies show 40 % of passengers never received flight miles . Many airlines do n't have frequent flyer service as a business model . Air France - KLM seen as one of the best , partnering with Boeing .