American and Delta discontinued their airlines agreement in 2015. At the time, Delta noted that its on-time operations were so good that it didn’t need to maintain an interline agreement in order to have passengers fly with American.
Is Delta Air Lines owned by American Airlines?
The American airline, along with its subsidiaries and regional affiliates, including Delta Connection, operates over 5,400 flights daily and serves 325 destinations in 52 countries on six continents. Delta is a founding member of the SkyTeam airline alliance. Delta Air Lines, Inc.