But don't blame the aforementioned websites and apps. Delta and Southwest,which together control about 35% of U.S. domestic seats, are the main culprits here. The Atlanta-based carrier now withholds its airfare data from popular apps and sites including TripAdvisor, Farecompare, Hipmunk and Hopper among other lesser known ones (American in the past has withheld its fare data, for various reasons, from OTAs such as Orbitz.com). is looking into the issue of airlines withholding prices from third party websites and apps, the airlines shouldn't be singled out here. Many consumers understandably assume that when they go to an airfare comparison website or app they will compare all airlines.

Source: Huffington Post January 31, 2017 19:40 UTC