Yes, you can book on AF website with AF marketed flights and enter your Skymiles number to get credit (it's best to not be logged into a Flying Blue account while doing this as site may use that instead). MQD will be earned as a percentage of miles flown rather than ticket price. See charts at https://www.delta.com/us/en/skymiles...rline-partners for percentages. AF/KL websites will potentially show DL fares/marketed flights if they are both DL operated and non-stop flights between US-EU. If you happen to book a DL marketed flight on their sites, flights will earn based on fare price rather than distance.