Hotel
This hotel is located a mere eight minutes from the Château. It is surrounded by the Sancerre vineyards and boasts an outdoor heated swimming pool.
Flight
CDG is the main airport near Paris. A taxi/uber to central Paris (e.g., the Eiffel Tower) will be approximately 45 minutes.
Train
"Paris Bercy" is the Train Station you will depart from if you choose to take the train to Sancerre. The address is 48 bis boulevard de Bercy 75012. The Station in Sancerre is called "Tracy Sancerre." There are several direct trains each day. Approximate travel time is 1 hour 45 minutes.