David, it would appear that Dalaman is bookable from Belfast, however only Bodrum is listed in the flight programme. Must be an oversight, and seems Dalaman flights are planned to operate.
I think Turkey will remain popular, just not at the level seen recently. Last year TOM operated Dalaman on Mondays and Thursday nights, this year they only operate on the Monday, and would seem that Izmir is not to operate for 2012 at the minute. This is in addition to the reduction in Goldtrail capacity.