newgrange, knowth or both

As I recall, the same shuttle goes to both. I was there in February, when Knowth was not open, so I only got to Newgrange. Why don't you ask her what she wants to do instead of making the decision for her? If she wants to see both, it won't take that much longer.

Nancy, thanks for reply, her only must see is the Cliffs. I am the trip coordinator as he doesn't care what we see and she is just going with the flow. How so I find out when Knowth is closed and if you had the choice which would you prefer/

The tours leave from the same visitors' centre. If you are short of time, you could visit Knowth while they visit the more famous Newgrange. Comparing the two later would give you a good dinner topic!

You could check a Michelin Green Guide. They have information about open times. I think, though, that it closed Nov 1 and opened back again in March, just after I was there. You might also find information on discoverireland.com.
I can't say which I would prefer, since I haven't seen both. But I also wouldn't take someone who didn't have a particular interest in that type of thing (which is why I went when I was on a solo trip instead of with the family - they didn't care to see it).

I personally liked Knowth better than Newgrange. Knowth has an assortment of smaller passage tombs. You can see into some of them. There are some interesting carvings on stones surrounding the main tomb. You need individual reservations to both unless they've changed the procedure. You make reservations for the first one open and get a later time to the other one. When my wife and I went, we were there almost first thing in the morning but Newgrange had the first tour booked. We got on the first Knowth tour and then the third Newgrange tour. I think we were eating lunch at the visitors' center around 12:30 and then we hit the road. This is a good place to buy the Republic of Ireland's OPW card. Doing Newgrange and Knowth almost pays for the card (or it did in 2010). I found this card to be an excellent value and at least doubled the value in free admissions. Skipping a long line at the Kilmainham Gaol was priceless. People at the sites are so happy to see a card holder and go out of their way to be helpful. We had a young woman get someone to take over for her at the ticket booth and she gave us a personal tour of Trim Castle.

I personally think you should do both if time allows. The shuttles run to both sites so it's really just a matter of allowing time because once you get to the central visitor center both sites are in easy reach. Knowth is a much better site from a serious study point of view and I recommend it if you can only do one. However you can't really go underground and experience the "tomb" aspect of the site. The Newgrange site suffers from IMHO so really suspect archeological recreationism but the internal experience is really something special. The visitors center is well done with good exhibits and nice cafeteria so hanging out there isn't a burden. When we went (in early May) we got lucky and got put on a shuttle right away and essentially did both sites back to back. We actually had to hang around after to see the exhibits because we had not down time. I would expect October to be largely the same crowds-wise. Have a greta trip,
=Tod

I consider Newgrange iconic. I haven't been to Knowth and would like to go there next time. First time, however, I'd want to see Newgrange. OTOH, she won't know what she's missing if you don't tell her.