Missynancy, you should peruse the US threads for answers to this. Theoretically, you should be able to get 2 tix for 100,000 miles on *A with US miles - but you probably will need to book near the 330 day window and there is no guarantee that US will show availability for LH, especially if you are looking for weekend travel. But if you can, be flexible - also look into departing from EWR or IAD if not too inconvenient. I don't know Amex MR very well to comment on.