Originally Posted by RoadWarrior200

I'm doing a fairly complex trip to Europe, all in business and first, that will require a BA code share from CDG to LHR and then back onto AA for a return to the U.S. The AA system couldn't do a seat assignment for the BA segment which is understandable, so I went to the BA web site. What I learned by trial and error is that BA couldn't find my itinerary with any of the AA locator materials, but when I did a search using my name and BA's flight number (not AA's code share flight number), the BA computer quickly found my itinerary, had a different locator number for their segment and then allowed me to select a seat. Which a few hours later showed up in my AA itinerary as well. Something for others to keep in mind if they likewise have trouble getting a seat on a BA code share.