It is safe 8.5 month pergnant lady can travel by Air?

I don't know why my answer did not appear here.

Travel is allowed till 32 weeks and is again dependent upon individual airline. So you need to call the travel agents or airline and check this information.

Moreover she will require a medical fitness certificate, stating that she is fit to travel. This is usually issued by gynaecs in private clinics, or the women's hospital and the health center as well. But the certificate is valid only for 7 days from date of issue.