I dunno, the plan seems flawed. In an emergency OP's husband would have to do wrt to the plane-flying, qualified or not, but it's a long ol' way to Greenland. We'd all have to bungle on a plane before we became zombie chow and there's no guarantee there'd be enough fuel, and fuel stops aren't really an option. Hmm.
I like the idea of a cruise ship that someone else came up with on another Apocalypse-planning thread.
Can your husband drive a cruise ship, OP?