Ah, cool stuff, UK Flyer.
I'd also add ORY: Orlyval automated people mover to Antony, for a direct connection on RER B suburban train to Paris Gare du Nord, mostly semi-fast services. Average journey time 30 minutes. Dunno the cost, but it's probably the same as CDG.
And possibly even (what with it being the new BD hub and all
) LIL: hourly shuttle bus between Lesquin and Lille-Europe. Average journey time is 20 minutes, cost €5.