So I take, The Jetbus (is this a bus or a train?) get off at Villejuif-Louis Aragon station and hop on the Metro Line 7, (which I gathering is a underground subway). And the Metro Line 7 should take me to the Gare de l'Est railway station.
That's what I understand from reading the below. Than that means there will be two cost one for the Jetbus and one for the Metro Line 7, correct?

The Jetbus (RATP line 285) runs every 12 to 15 minutes and connects both terminals with the Villejuif-Louis Aragon station of Métro Line 7 on the southern edge of Paris. This may be more convenient than Orlybus if you're staying near the Opera Garnier, since you can get to the Opera station without changing trains. It's a few cents cheaper than the Orlybus at €5,40.

regards tc

Yes, the Jetbus is just a shuttle bus that runs from Orly to the end of line 7 -- 2 different tickets.

Apologies, mislocated Orly quite badly. I still think even 40E for strangers to Paris is not a bad investment unless they are very accustomed to navigating subway/public transport systems.

Yes, the JetBus is cheap and (fairly) fast - as I said at 9:50 yesterday morning. But see* below.
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The RER C fares I quoted are on the RATP site:

http://www.ratp.info/orienter/aeroports.php

I, too, am puzzled why the transilien site gives a different number.
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* tcmazz1 might also want to factor in the cost/benefit of acquiring an RATP pass such as <i>Mobilis</i> or <i>Carte Orange</i>. Once it's paid for, the trip from the end of Ligne 7 to the hotel is &quot;free&quot; (or, at least paid for) - but only if you take the 183 bus to Porte de Choisy, because the JetBus terminus is in Zone 3, and therefore not covered by the usual two-zone pass tourists use. Porte de Choisy is in Zone 2.

Robes: VAL is the name of the type of automated metro trains - not sure what the letters stand for but is used on similar conveyances in other parts of France. Agree that 7 e is steep - this i believe is a private operation and not a part of RATP but not sure. But for folks with luggage especially it's more easier as you take your luggage cart right up to the Orly VAL in the terminals and the transfer is smooth as possible at Antony. Gare du Nord? Well that's a bit chaotic for sure especially for novices. But the RER C way, which i've taken you have to get the navette bus and then wait at the very shabby RER C Rungis station and ride the usual old single floor train cars to St Michel for another confusing change for novices. So if cost is not a factor B is better than C, depending on where you're going of course. The Jet Bus seems very good, however and could be the easiest, if not quickest.

It was designed as a fully automated VAL (V&eacute;hicule Automatique L&eacute;ger) system based on the successful model previously established in the northern French city of Lille.
VAL comprises driverless (automatic) rubber-tyred vehicles, using technology devised by Professor Robert Gabillard for Matra's 1983 metro in Lille. Platforms are separated from passengers by a glass partition to prevent them falling or straying, while doors embedded in these see-through barriers open in synchrony with train doors.

Robespierre - Here's one more question for you. If a single Metro ticket is sufficient to get to a station at the end of the line that is in zone 3, why wouldn't the same be true for someone using a zones 1-2 Carte Orange (for Metro stations, at least, if not RER stations)?

M&eacute;tro tickets are valid anywhere the tracks go, regardless of zone. Some of them wind up in Zone 3.

Passes are valid only in their designated zones.

tc - After all this discussion, here's what it comes down to for economical routes:
1. Jetbus for E5.50 (if there is a child's fare, I don't know what it is) + Metro line 7 for E1.40. Only one transfer.
2. Free shuttle bus to RER C station + RER ticket (E5.75 adult, E4.00 child) which is also good on the Metro so long as you don't exit the system. Take the RER C to Gare d'Austerlitz and transfer to Metro line 5 which goes directly to Gare de l'Est. Two transfers altogether.

Of course, if you buy a carnet of 10 metro tickets, it brings the price of the metro ticket down to 1.08 &euro;.

Least expensive:

City bus N&deg; 183 to Porte de Choisy - one <i>ticket 't'</i> &euro;1.40 (or &euro;1.09 in a <i>carnet</i

M&eacute;tro to hotel - RATP pass or one <i>ticket 't'</i> &euro;1.40 (or &euro;1.09 in a <i>carnet</i

Children (under 11 I think) - half price.

Kerouac and Robespierre - Your points are well taken. Howver, since the OP said he was unfamiliar with the Paris transportation system, I was trying to sum things up and give him two simple but fairly fast options without going into the details about carnets, passes, etc. And Robespierre, correct me if I'm wrong, but I believe a half-price ride for children 4-10 is only available by buying a tarif reduit carnet. I don't think you can buy a single child's ticket.

True - but getting on a bus and changing to a M&eacute;tro isn't rocket science. Ligne 7 goes right to Gare de l'Est. Here's a map of the transfer. The bus stop is 20 steps west of the M&eacute;tro entrance:

http://www.ratp.info/picts/plans/pdf...rte_choisy.pdf