Within the AmEx realm it can often make more sense to transfer MR points to Flying Blue or Virgin Atlantic for Delta flights instead of going directly to Delta. Not only do those programs often have award space on Delta flights for fewer miles than Delta does, they’ll also offer a 20-40% transfer bonus typically once a year while there hasn’t been a Delta transfer bonus in about forever.

One dii is en side to that is that you may have to call those airlines customer service lines in order to book onto Delta metal rather than just booking easily online