If I'm remember his contract situation, Flynn could be had on the cheap.
The Hawks owe him a fairly sizeable ($3-$5 Million) bonus come spring and chances are they will cut him.
The guy will be coming off a year where he didn't play and made a huge chunk of money - so money may not be his primary motivation if he is cut and becomes a free agent.
I could see him signing with a team where he thinks he'll start (i.e. a competition against an awful QB like Sanchez) and take a reasonably priced, short term deal.
Of course, all this is for naught if the Hawks don't cut him.