F9 cancelled a couple of flights across the system so that they could use the plane for the charter. Midweek is typically slow system wide, so having a flight cancelled that had low loads to begin with did not really adversly affect the operation. Charter flights are guaranteed $$$.
As for transatlantic from MSY
, it'll happen sooner or later, i've been hearing some interesting things lately but I can't say much more than that for now.