Arriving at CDG early August on a Sat about 930AM from US.
Understand train will be cheapest option, but can we buy tickets once we're at the train station? If we need to buy in advance, how much time should we allow from landing at CDG before train departure (understand train station would be St. Lazarre?
Any recommendations for private transfer companies?
A taxi at a fixed rate from CDG to the train station is your best bet. A private transfer company can't use the bus lanes as an official taxi can, so the taxi should be faster. The taxi fixed rate covers 4 persons and luggage.
If you are referring to a private transfer all the way to Bayeux from CDG, I have no recommendations. The cost would be way too high for me. It is 285 km distance, and the driver would have to return empty to Paris, so the charge would be substantial, even split four ways. And it would probably not be as fast as the train journey.
Allow four hours between ETA for your flight and the train’s departure time.
Daytrip.com provides excellent private transfers if that's the method you choose to use for door to door service. It appears the cost would be around $600.
For a shuttle service you can try Shuttle Inter. The charge should be between 500€ and 550€ from CDG. http://www.shuttle-inter.com/contact-us/
