Paris in 7 hrs

I would go to Eiffel Tower, Arch de Triumph, Louvre, then Notre Dame. I would skip Sacra Couer. If you did have time, i would do it at the end and either Taxi or RER B back to CDG.

There will be luggage storage at the RER station in CDG.

Realistic time frame: It will take an hour to get off the incoming plane and go though border entrance procedures. Add a half hour to check a bag and another half-hour to get on the regional train into central Paris, a ride that takes around 40 minutes. In reverse, close to an hour for the train back to the airport. And you should be at the airport two hours before flight departure because you have to traverse the usual security procedures, and whatever time it takes to retrieve your stored bag. That leaves maybe four hours to sight-see. I'd spend all that time inside the Louvre, and take a light meal.

For local transit http://services.ratp.fr/en/ratp/c_21879/visiting-paris/

Trevlevs2,
Pay close attention to the post above. You really don't have much time to sightsee. You might have time to see the Eiffel tower and Lourve (outside).

Here's a route to see these two:
Take the RER B from CDG to Denfert-Rochereau, transfer to Metro line 6 towards Charles de Gaulle-Etoile get off at Trocadero (about 1 hr 10 min. transit time) You pop up out of the ground and there will be the Eiffel Tower. Walk toward the Seine grab some ice cream from one of the vendors go around the tower (unless you have a ticket you won't be walking under it).

Then proceed down to the end of the Champ de Mars. Turn left on Place Joffre and make your way to the nearest metro École Militaire. This is about a 1.25-mile walk. Take Mero line 8 towards Pointe du Lac and get off at Concorde (about 8 minutes of transit time). At Place de la Concorde look down the Champs-Élysées toward the Arc de Triomphe then turn around and head the opposite direction.

Walkthrough the Jardin des Tuileries toward the Louvre. This is about a 0.8-mile walk. Gaze at the pyramid and take some photos of the reflections in the fountains. Turn left at the pyramid and head to metro station Palais Royal Musée du Louvre. Take metro line 1 towards Château de Vincennes and get off at Châtelet–Les Halles then take the RER B back to CDG (about 1 hr transit time).

This route would give you a chance to see some of the sights you mentioned and get a little preview of Paris. Paris really deserves more time so plan another visit. Good luck and I hope you have a great trip!

Thank you this is very helpful information

I'm not sure you can get a very good view of Notre Dame because of the catastrophic fire. You certainly cannot go inside.