What are your concerns? As far as I know the only usual restrictions your provider might give you are when you’re 36+ weeks or if you’re high risk. I think usual advice would be to make sure you move your legs (think foot pumps) and/or wear compression socks and/or stop and walk around every 2-3 hrs to prevent any blood clots…but I don’t even know if that’s a concern until you’re in the second or third trimester.
Re: Travelling?