At every DO I've attended, I've raised the question to Larry & Jeff about when we'll see IAH/MAD non-stop flights. For years they have flight 62 shown as a direct flight, but there always has been a change of aircraft at EWR.
Their replies have been very positive about "future" service, but we all know that CO just doesn't have any widebodies to spare. If the 787's had been delivered as originally scheduled, CO would have been able to start more non stop service to europe out of IAH.
I noticed that this year AA did start flying from their Dallas hub to Madrid using a 767.