I want to transfer 200K miles to AF/KLM for a redemption, but have no flying history on my Flying Blue account and want to establish one before booking a flight using those miles (reducing the risk of the booking being reviewed by their fraud team). I have upcoming travel already booked on DL, with my Sky Miles account number already linked to the reservation.

I've heard that even calling and adding my FB number might not make it "stick" and that DL will still revert to my Sky Miles account even if it's listed as secondary. Does anyone have experience with this, and/or advice for ensuring the CSR does it correctly if I call in?


(Emma dog lightly edited post after splitting from another thread)