I know it's all speculative at this point, but are you thinking of also a charter plane from Houston/Atlanta/Miami to Roatan, and then from there to Utila?
Just looking at those dates (I know, also very tentative), Miami is the best option for me compared to the other two.
Edit: Maybe Taca Airlines can charter a flight for all of us directly from Miami to Utila??
You can pretty much count me in for this. It will be even MORE fun to actually be SCUBA diving for fun, and not going through the certification classes.