Flight search: coming home from abroad
I am aware of sites that allow you to indicate a specific airport and get a variety of prices for a variety of destinations on a certain date.
However, I want the OPPOSITE. I want to end up at MSP, but at the end of my adventures this summer I can return from a wide variety of (mostly European) destinations, and I may choose my itinerary based on what city I get the cheapest flight home from. (I already have our one-way Business flights lined up for getting there.)
Any sites that do this? SkyScanner and Google Flights and Kayak are my go-tos, and they're all busts.