From the Airport Roissy-CDG:
Take RER B direction Paris-St Remy les Chevreuse "
Change at the station "Chatelet-les Halles", take subway line 1 direction "La Defense"
Change to "Concorde", take line 8 direction "Balard"
Get off at station "Ecole Militaire".
or
Air France bus stop "Les Invalides"
Take Metro line 8 direction "Balard"
Get off at station "Ecole Militaire".

From Orly Airport:
Bus ORLYBUS "stop at" Place Denfert-Rochereau "
Take Metro line 6 direction "Etoile"
Change at "La Motte Piquet-Grenelle", take line 8 direction Creteil "
Get off at "Ecole Militaire"
or
Air France bus stop "Les Invalides"
Take Metro line 8 direction "Balard"
Get off at station "Ecole Militaire".

From Gare du Nord and Gare de l'EST
Take the Metro line 4 direction "Porte d'Orléans"
Change at "Strasbourg St-Denis"
Take line 8 direction "Balard"
Get off at station "Ecole Militaire".

From Gare Montparnasse
Take Subway Line 6 direction "Charles de Gaule Etoile"
Change at "Motte Piquet Grenelle"
Take line 8 direction Créteil "
Get off at station "Ecole Militaire".

From Gare de Lyon
Take metro line 14 direction "Saint Lazare"
Change at "Madelaine"
Take line 8 direction "Balard"
Get off at station "Ecole Militaire".

From Gare Saint Lazare
Take metro line 14 towards Bibliothèque François Mitterand "
Change at "Madelaine"
Take line 8 direction "Balard"
Get off at station "Ecole Militaire".

Metro or RER
At 150 meters from the hotel: Metro line 8 station "Ecole Militaire"
200m from the hotel: Metro line 8: station "La Tour Maubourg"
500 m from the hotel: RER C station: Pont de l'Alma ".

The hotel is open all year .... 24h/24h.