Kinda new to flying partner airlines and wanted to make sure I booked the best way possible. I’m also on mobile so it’s a bit hard to search since the webpage tends to crash when going to big posts.

So here we go… paying cash for Premium Select and flight there is on Virgin Atlantic and the flight back is on KLM. Who is the best choice to book the flight with? Delta, VA, or KLM? (Price is the same on each airline) I am Platinum with Delta. I’m wanting to maximize MQM, MQD and mileage earnings. Thanks for any tips or redirects.