Hmmm....if JetBlue applies, I'm not sure if they'd use them to JFK, at least not yet. A DCA-JFK route would essentially compete with the US, DL, and AA DCA-LGA shuttles. JetBlue would likely want more DCA slots than that if they were going to charge into that particular battle. 3 daily roundtrips wouldn't offer effective competition, I'm not sure if they'd want to do that.
Within-perimeter would close out DEN, OAK, and LGB. The DC market is dense enough that, say 2 daily FLL/ 1 daily MCO would probably flourish alongside JetBlue's IAD services to FLL. But these cities would not offer the highest yield B6 could get out of DCA slots. They'd probably fly these routes as "placeholders" until they can get hold of say enough slots for 3-4 more round trips, *then* launch a DCA-JFK route with 6-7 dailies. A year or so ago Neeleman talked about wanting to get into the NY-DC market, which he considered artifically depressed by high network-carrier fares.
Question: PEOPLExpress flew DCA-EWR in the 1980's. I seem to remember them running close to shuttle frequencies--10 or 12 dailies, or something like that. How did PE get all those slots? Did they buy them, or sublease them?
Need a new airline paint scheme? Better call Saul! (Bass that is)