I am sorry to hear about your father and I am sorry that this response was delayed.
My comments may affect future decisions, so I'll still offer some ideas for your consideration.
The Aerospace Medical Association's (ASMA) recommendation are that as long as the acute phase of a stroke has passed, a person may travel at the discretion of the treating physician. It is important that person's such as your father do not travel alone. And, I see that your mother will be accompanying him.
Some other thoughts for your consideration. Your father should not stay seated for prolonged periods of time on the flight. He should get up and walk around the airplane every 1 or 2 hours. By doing so, he will avoid getting blood clots in his legs (the medical name for this is deep vein thrombosis).
It is extremely important that your father's primary care physician address high blood pressure, high cholesterol, and any other risk factors that your father may have for a future stroke (smoking, blood vessel abnormality in the brain).
I hope your parents have/had safe travels and feel free to ask additional questions.
~•~ Dr. Parks
This answer is not intended as and does not substitute for medical advice. The information presented in this posting is for patients’ education only. As always, I encourage you to see your personal physician for further evaluation of your individual case.
Thank you for your advice, my parents sought further medical advice and had decided to make the trip, they both arrived safely today.
I will ask that my dad do as you advised during his return flight home in 10 days.
He already has an appointment for follow up consultation in early May.