Originally Posted by
flyerCO
Your AMEX benefits are granted because you are using your DL FF account on the reservation. If you book a ticket using the AMEX, but credit the miles to another airline program (such as KLM Flying Blue) you won't get the benefits.
Thanks for explanation. Yes, I read that the flight must be Delta marketed and operated. I was going to book on Airfrance website as a basic economy, where I would get to choose a seat. The flight was operated by Delta but marketed as AF. Originally, I was thinking of booking with AMEX and get the free seat selection and free checked bag at the airport. But before, I did, I read clearly the rules and I saw that I would not received a free checked bag in that scenario. But most importantly, I didn't have to use Delta.