Originally Posted by
B7e7US
CDG-LHR segment of a CDG-LHR-US trip. For the first time, AF won't allow me to select a seat in the CDG-LHR flight (economy). Is this because the ticket was issued by Delta (006 stock) ?
No, it's because it is never possible - and has never been possible - to select seats in advance on AF short and medium haul flights in economy (or premium economy for that matter).