Onur Air are used by a number of tour operators, including Holidays4u, Goldtrail (their biggest customer in the UK) and first choice.
Goldtrail are selling :
Antalya is on sale 9 Jul - 1 Oct on a wednesday.
Bodrum is on sale 23 Mar - 29 Oct on Sun (then Wed at end of Oct)
Dalaman is on sale 23 mar - 29 Oct also Sun
Doesn't look like first choice are using them this year.
No option for the Mon and Tues DLM which operated in S07 so unless there's more to come, that appears to be it from OHY.
Zoom will be using the 757 on the YYZ route but is CWL-YYZ only.
Monarch will be in with the A330 to operate SFB.
Check-in space is going to be limited next summer, not including if/when the nameless airline comes in.