I just booked my flights to Houston. Following Sun policy, I phoned Amex Travel instead of booking with an online travel agent. After 10 minutes on hold, I booked $868.59 worth of flights. This would have cost $666.44 via orbitz.com. So yeah, big companies suck. Mon Jan 28, 6:00: UA 7635, YUL-ORD, arr 7:36 8:15:…