TIA and fitness to fly (flying)

• epilepsy - contraindications to flying include frequent or uncontrolled fits, or a within 24 hours of a grand mal fit. Passengers with a history of a loss of consciousness or infrequent fits should be accompanied by a responsible companion. The patient should be advised that air travel may precipitate fits due to a variety of reasons e.g. fatigue, disturbance of circadian rhythm
  
  
• skull fracture or brain surgery - flying should be avoided for 10 to 14 days to allow absorption of any air that may be inside the skull due to trauma or surgery
  
  
• stroke - in general, flying is contraindicated for 7 to 10 days following a ischaemic stroke (2). Flying is contraindicated for 14 days following a haemorrhagic stroke (2). Oxygen may be required
  
  
• TIA - may be accepted as fit to fly if
  • after 2 days and proper investigation (3)

Note that these are only guidelines and each airline has its own regulations and medical standards.

Reference:

1. 'Medical guidelines for air travel', Aviation, Space and Environmental Medicine, October 1996, 67, 10, 11.
2. Doctor (April 2005). Ready Reckoner - fitness to fly.
3. International Air Transport Association. Medical Manual 11th Edition (2018).