Since the Charles de Gaulle Airport website is fairly useless, I ask for your help because I've read/heard that although the terminals are small, it's not an easy airport to navigate.

Flying Boston-CDG-Bupapest on Delta 8303 operated by Air France. It arrives CDG at 6:10am and then departs at 9:40am on Delta 8570 operated by Air France.

At CDG, will I depart from the same terminal I arrive in?

Since I am just in transit, do I need Euros to pay for food or should I just use a credit card?

Anything else I should know for this brief little layover? Going back to US is non-stop BUD-JFK so no worries there.

Thanks in advance!

Not sure what you mean by the website being useless, it's all there - arrivals, departures, terminals, gates...
It tells me that you arrive in Terminal 2 E and leave from Terminal 2 D, they are opposite each other, plenty of time to walk around as you can see on this page from the airport website:

http://tinyurl.com/ysewj9

(The full URL is http://www.aeroportsdeparis.fr/Adp/R...5a0868c-463d-4
60c-b18e-9904c3f6de31-plant2efg)

You may be able to pay in US currency, or with a credit card, or worse comes to worst, get 20 Euros from an ATM.

The above is pretty much right on. You will need to switch terminals (they call them 2D and 2E, but they are separate terminals). You will go through immigration at CDG, but you shouldn't need to collect your bags. This will almost certainly mean exiting the secured area and going through security at 2D. And bear in mind that the walk from 2E to 2D is pretty far - something like 10 to 15 minutes.

As for food, you might want to swing by an ATM. Some of the restaurants I have been to at CDG took only chip-and-pin cards, and only French ones at that, as my Danish card doesn't always work. The selection is pretty meager. And make sure that you eat before going through security at 2D, as there is very, very little in terms of food or shopping post-security.

Thanks both of you.

Dalai, "fairly useless" was probably too strong a term, but I do appreciate your help. I was getting a little stressed because I don't know the airport as I usually would when travelling.

Travelgourment, thanks for the tip on the meager food choices!

While the selection is meager, there is definitely a Paul located between 2E and 2D. You can get a coffee and some sort of roll, pastry, etc. You can't miss it, it is in the middle of the walkway, just before you reach the train station.