Hi Dennise,
We are looking at going back at the end of April, 2006. I have been watching for flights (mostly on Canjet as I have vouchers with them) and the schedules for Westjet and Canjet have not yet been posted out that far.
If Canjet's fares remain consistent with their current fares for February, I believe a round trip will cost approximately $460/person. They are also the only direct carrier out of Halifax (other than maybe charters). I believe AC's rates show around $605/person with a stop in TO.
I have been watching since we returned mid-April and prices have not changed much, if at all, so this might be as good as it gets.
Good luck.
Jeff