The post below was originally published on Hipmunk's Tailwind Blog on 7th January 2016.One by one, major American airlines have been changing their loyalty program policies from a distance-based system to a price-based system, causing some angst among frequent travelers. After announcements from Delta and United last year, American Airlines was the final hold out until November 18, when they announced changes to AAdvantage. At all three of these airlines, ...