Originally Posted by Rebelyell

I am a Platinum and recently booked a round-trip Venice to Memphis, returning in September. As always all of my domestic segments were upgraded to Comfort Plus. In addition, my Detroit to Amsterdam flight upgraded to Comfort Plus. I didn't think Delta gave complimentary upgrades on international flights. FWIW, the upgraded flight is on KLM. I'm just trying to figure out what the rules are.