From Orly Airport

By ORLYBUS

Navette (shuttle) Orly → Place Denfert-Rochereau (30mn)
Métro line 6 Denfert-Rochereau→ Charles de Gaulle Etoile (30mn)
Métro line 1 Charles de Gaulle Etoile → La Défense (10mn)
Tram Line 2: alight at Suresnes-Longchamp, or Train (SNCF, Line L or U): alight at Suresnes-Mont-Valérien.

With ORLYVAL

From Orly → Antony (8mn)
RER B Antony → Châtelet-les-Halles (25 mn)
RER A Châtelet-les-Halles → La Défense (15mn)
Tram Line 2: alight at Suresnes-Longchamp, or Train (Transilien SNCF Line L or U): alight at Suresnes-Mont-Valérien.

By the BUS DIRECT (LINE 1)

Line 1 : Airport Paris-Orly / Etoile (45mn)
Métro line 1 (yellow line) Porte-Maillot or Place de l’Etoile → La Défense (10mn)
Tram Line 2: alight at Suresnes-Longchamp, or Train (Transilien SNCF Line L or U): alight at Suresnes-Mont-Valérien.