I was flying home from Chicago yesterday through O'Hare. When I arrived at the airport about 10:00am, the board showed my flight was leaving from gate K18. After going through security and arriving at K18, an announcement was there informing everyone of a gate change to K6. We started to board the flight when an announcement was made that the plane at K6 was really going to NY instead of Tampa. Everybody off the plane and move to K7. By this time the flight is delayed. Finally we were told of another gate change to K19. Finally got on the plane after a 2 hour delay. Why do I continue to fly American Airlines? I emailed a complaint to AA customer service this morning.