It's the best time to fly with a baby. Once they start crawling or walking, long haul flights become fairly hellish. We did Seattle (12 hours) when our daughter was 10 months which was brilliant. We booked late flights with the baby cot and she slept for pretty much the whole flight. Just to let you know, British Airways won't guarantee you a bulkhead seat or babycot, even if you pre-book. I'd try and fly on American, Virgin or Air Canada if possible as it's a much better service.
Two useful items: Travelcots and carseats, but instead of taking them with you, try and get them beforehand. In America, we borrowed them locally, I found some local mums who lent me theirs on an internet forum (so handy!). My daughter doesn't sleep that well if she's not in a travelcot. Samsonite do pop-up travel cots but these are only suitable until they can sit up unaided so not much good for us now.
