daz - are we talking about Chapter 11 style bankruptcy, namely 'cancel all the debts that you can't pay and make the staff take wage cuts and just start again', or a form of bankruptcy which is something like the UK variety ?
I seem to recall that in 2002 (or maybe 2003), Air Canada went through bankruptcy proceedings, re-emerging about 18 months later. As far as passengers were concerned, there was little noticeable change.