Recent survey found 40 % of passengers never redeem loyalty miles . Comment: Still , if a good loyalty scheme is rated on the ease of acquiring a reward seat , the British carriers are n't the only ones letting customers down . Air France-KLM seen as one of the best , partnering with Delta .
Recent survey found 40 % of passengers never redeem loyalty miles . Comment: Air France-KLM seen as one of the best , partnering with Delta .