Guenmai

I've been using the public transportation from the airport to the Mabillon station,in the 6th, for decades and with luggage. The only time I take a taxi is when I take my mom along or once, a few years ago, when friends came along and insisted on a taxi...which was silly...as all of their luggage had been lost so they had absolutely nothing to carry whereas I had two suitcases and had no problem in wanting to take the train/metro. So, it's all a personal choice. Happy Travels!

Michel_Paris

To combine economical with pleasant views, the Roissybus and Air France Bus are good options. The Roissybus has a drop off near Opera (Garnier). From there you can access multiple metro lines (f0r example to Sentier) Cost is 8,60 euro one way.

http://www.ratp.info/informer/anglai..._roissybus.php

The Air France bus (note, not at all limited to Air France customers)
has multiple drop-offs, all with Metro access (Montparnasse, Invalides, Gare de Lyon, Porte Maillot, Arc de Triomphe) So you can access Left and Right bank. Cost is 14 euro one way

www.cars-airfrance.com

Both run early to late.

ira

Hi L,

Take a cab.

After DH, you and the kids have learned how to use the metro and trains, you can decide if you want to take the RER to the airport.

MrNuke

I don't have an opinion one way or the other, but as others mentioned one ticket will do it. Also getting to Saint-Germain-des-Prés isn't that difficult. A fairly painless switch can be made from RER-B to Metro Line 4 at either Châtelet - Les Halles or Saint-Michel.