Flying

Should I avoid it? No, not unless your due date is near or your doctor tells you that you or your baby has a medical condition that warrants keeping you near home. You can fly up to 4 weeks before your due date and that cut-off time is not because flying can cause problems, but because it's just best to stay close to home and your doctor in case you deliver.
However, pregnant women who shouldn't fly include those with:
high blood pressure (or hypertension) during pregnancy
sickle cell disease
gestational diabetes that hasn't been well-controlled
abnormalities of the placenta
the risk of going into premature labor
What are the risks, if any, to my baby? For women with healthy pregnancies, there are no significant risks. However, women who have difficult pregnancies, especially involving their cardiovascular system, could be compromised by air flight and should discuss any flying plans with their doctor.
What can I do about it? Discuss any plans for lengthy or distant travel with your doctor during your last trimester, just in case. If he or she says it's OK, check with the airlines to find out what their policies are regarding flying during pregnancy. (Most airlines will allow pregnant women to fly up until week 36 for domestic flights and week 35 for international travel.)
To make sure your flight is as comfortable as possible, you may want to:
Move your lower legs regularly and/or get out of your seat (especially during long flights) to promote blood circulation and help prevent blood cots.
Wear support stockings to further prevent clotting in your legs.
Keep your seatbelt on when you're seated to keep the jostling of turbulence to a minimum.