Back at Eurostar, Mr Brown highlights the fact that it already runs direct seasonal services to Avignon in the south of France, and winter services to Bourg-Saint-Maurice, Aime-la-Plagne and Moutiers in the French Alps.
"Feedback from the airlines last year indicated they were very grateful the military airspace was available -- it allowed them to fly more direct routes and save time and fuel, " FAA spokeswoman Laura Brown said.