I'm sure it's happened before but its not something I've ever come across and curious about what's underlying
Looking at options for a trip (and have realized that I have my date wrong and cities in the wrong order, so I know I won't be booking this) but curious how economy "lowest" economy fare (booking into C and Y) can fare at $1,000 more than the business (booking into D and Y fare)... I'm guessing a significant part of it is the 2nd segment booking into Y but what's keeping that segment from booking into lower inventory given it looks like all of the buckets are wide open....
I guess it just seems strange (even in the absurdities of fare rules, married availability, etc. that the engine can't come up with an economy fare that is at least the same as lowest business fare.