I've traveled both pregnancies, this time was flying home at like 13 weeks with my son, I drank ginger ale and had snacks in my bag for us but it was much easier on my stomach than driving I would think it wouldn't be a problem
I was 20 weeks when I flew, didn't seem to have any issues. But if you need, heard graval is ok but just double check with your doctor. If its a long flight, would try to book a seat near the bathroom just incase.