We will be flying 3.5 hrs to Sydney at 13 weeks.. I normally have issues with swelling anyway so stockings are a must for me. GP says preg women are more prone to clotting so they would be an idea anyway..
Most airlines do have a rule.. No fly in 3rd trimester so no liability if u go into labour at 30000 ft. I think it's more a common sense thing.. If you hit heavy turbulence strapped in your seat at 36 weeks there may be some cause for concern!!