Delta Air Lines may have charged some frequent flyers higher airfares than other customers for almost three weeks because of a glitch, which has triggered questions about the complexity of flight searches.
Reports surfaced last week from two business travelers who noticed prices on routes they were searching were different depending on whether or not they were logged into their Delta frequent flyer accounts. Prices were higher when logged in on Delta's website versus anonymous price searches without logging in.
On Friday, Delta offered a detailed explanation of the discrepancy. Although the problem has been solved, it brings into light the complexity of airline pricing.