Hi,
I travelled to Chicago (United) then onto Winnipeg (United Express). Was a lot cheaper than I expected aswell (just over £400 if i remember rightly). However there is a new airline just started called Zoom which is the only one to travel direct from London to Winnipeg. Check it out.
As regards hourly rates, its all on their website. I was paying $85 per hour for a C152. That equates to about £36 or so. That rate includes headsets if you dont want to take your own.
Do PM if any other info is required.
Foz