Related question: I am booking KLM-marketed flight from AMS to US, open-jaw ticket (returning from a different airport). Operated by Delta inbound, Air France on return.
This results in only one Economy fare option displayed after choosing the flight:
I cannot risk booking into Basic Economy on Delta since this is an MQM run too.
It looks to me like Economy Standard (not light), although the "no free seat selection" raises doubts. Can the experts confirm this will be main cabin?