As long as you are not high risk and get the ok from your doctor. Usually they recommend not traveling after 36weeks...
Depends on how far along you are.
I plan on traveling by vehicle to Georgia from Michigan for my family's annual thanksgiving gathering and I'll be 28 weeks; however, my doctor did tell me that even though I have a normal healthy pregnancy. ..I should not be traveling anywhere beyond 34 weeks. I Don't know if each doctor has a different recommendation or not but this is what mines just stated this past week.
Good question. I'll be traveling soon too, and I feel like the only reason doc wouldn't let you travel is fear of you going into early labor.