I was at O'Hare today!! I came home for the holiday.
The above lists pretty much cover it. Except for Trans Meridian, but I don't know if they are an international carrier. Are they? I assume so, because they had two Airbusses parked in front of the international terminal.
When we taxied by the international terminal I saw about 5 AA 767s, 1 AA MD-11, a United 777, a Lufthansa 747-200, a Swissair Asia MD-11, and the two Trans Meridian planes. Most of the gates are empty at this time of day.
There's also Iberia, which is a Codeshare-Partner of American. The two airlines
fly from Chicago to other 19 destinations in the United Staates! Iberia is
after BA the biggest partner of AA.
With over then 70million passengers every year, O'Hare is the bussiest airport of the world! You can say, that almost all international carriers fly to Chicago.
This airport can be a Mega-Hub and homebase for the new alliance oneworld!!