I used to be a size 10-12 pre-pregnancy. At Christmas I was 23 weeks and went on a 2 hour train ride and I was fine but felt a bit uncomfortable. I personally wouldn't consider a 7 hour journey now as I would feel sore and uncomfortable and a holiday would be wasted on me as I am too tired and hormonal.
But every pregnancy is different - bumps can be in different positions for a start and that affects how easy it is to move to some extent at this stage. Personally, I can't lean forwards much without spreading my legs far more than you could on a plane (that sounds wrong

) and I can barely lean sideways either. I find moving generally quite hard now. And I have a painful pelvis and amazingly painful things going on at the very top of my bump (not where baby is but where all my insides have been pushed to) which I think is to do with pressure from my breasts

My back aches but that is quite mild compared to everything else though.
If you are feeling great then you probably will not have my issues. I don't want to scare you or put you off, but I think you were looking for advice from people at my stage to how difficult it may be to travel and this is my experience. But there will be plenty of people who have lots of energy, no pain and feel there should be no problems, I'm sure.
It says in one of my pregnancy books that some airlines will require a doctor's note before travel to say you are well enough to travel.
Let us know what you decide to do
