I'm about to book a trip to Izmir, Turkey from CVG and one of the itineraries includes a return connection in FRA from TK 1587 to DL 49 with only one hour between arrival and departure. Is this enough time to make the change? If not could I book the DL 27 flight to ATL and see if I could make DL49 as standby if I have enough time? My other options are AF through CDG for about the same price, but I’d prefer to stay with Delta; Delta out of IST would be okay, but it is more expensive than the others.
All recommendations appreciated.

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Todd