Just in case anyone is looking for an extremely lightweight packable jacket for your travels, Costco has the 32 Degrees Ladies Winter Tech Jacket, which will go on sale this Monday, November 13 for their holiday say (runs from 11/13 to 11/27).
I saw it in the store a few days ago and almost bought it then because I liked it so much. However, I decided to wait to see if the price came down. And it did! It is currently $29.99 in stores ($3 higher online) but will be priced at $19.99 on Monday. The jacket looks really nice. It is light enough so that you could easily scrunch it into a small space, looks good on the body and seems like it would keep you warm. it seems to run a bit large, as I usually wear an extra-large but the large fit me.