I'm taking my two kids, 4 and 6, to spend the summer at my in-laws in Izmir, Turkey next week. The outbound itinerary is DL42 CVG-AMS transferring to Turkish Airlines TK8852, operated by Sun Express (XQ), a direct flight to Izmir done on a single ticket. I know DL has an interline agreement with TK, but does anyone know if Delta will be able to check the bags through when I check-in at CVG? I was issued paper tickets for this trip (not my choice), and DL doesn't have an agreement with XQ.