oh no.....thats not good for us canadians. however, you can still go to coz if you want. you just need to put together your own travel plan. fly to cancun. ado bus to playa. ferry to coz (or you can fly). then reverse to get home. we have done that a few times. takes a bit of work planning though. but we almost never book charter packages.
playa is a great option though. we love it there. we usually split the trip between playa and coz. i have been to playa a number of times. shoot me a message if you need any input.
Westjet also cancelled all CZM flights till Jan 9. I was actually in Playa (AC AI) back in September, For 1 week tho, I'd probably save the hassle of ferry to CZM both ways. The Playa AC AI package is C$6xx a week at 4.5 star Blue Bay for 1px, almost as cheap as the flights alone.