Looking for suggestions for car or taxi rental from CDG airport to our hotel in Chartres
Have you asked the hotel? That will be about a 2 hour trip with a fare of maybe around 300€. If the hotel does not work out, try asking Shuttle Inter if they will do it. Are you thinking of renting a car or taking a taxi? I’m not sure what a taxi rental is.
Daytrip is quoting a price of 214 euro for a random day with pick up at 9 am for 2 passengers with 2 pieces of luggage. Not cheap, but they will meet you outside baggage claim with a sign with your name on it. They will even add on a side stop (for an additional fee) if you would like to check out something along the way. I've used them 3 times in the last 2 years. Nothing but professional interactions with the office staff and with drivers.
A recent thread on Daytrip: https://community.ricksteves.com/travel-forum/day-tours/daytrip
Daytrip website: https://mydaytrip.com/