The question every patient asks on day two, and the one most likely to be answered badly by the internet. The wait before flying is not about whether the wound looks healed. It is about two specific risks — blood clots and trapped air — plus the practical problem of being far from the team that operated on you if something goes wrong.

Why the wait exists

Clots. Surgery makes blood more likely to clot, and long-haul flights add immobility and dehydration on top. Deep vein thrombosis and pulmonary embolism are the reason most fit-to-fly advice is measured in weeks rather than days, particularly after lower-limb and pelvic surgery.

Trapped air. Cabin pressure at altitude is lower than at sea level, so any gas left inside the body expands. That matters after chest surgery, abdominal surgery, eye surgery and craniotomy, where air introduced during the operation takes time to resorb.

Distance from your surgeon. Most complications that appear late show up in the second and third weeks. Being in the same city when that happens is worth more than getting home four days sooner.

Typical waits by procedure

These are the ranges our partner hospitals generally work to. Your surgeon's judgement overrides all of them.

• Bypass or valve surgery: around 10-14 days after discharge, so roughly two and a half to three weeks from surgery. See cardiac surgery.
• Angioplasty and stenting: often within a few days if uncomplicated.
• Craniotomy: two to three weeks, largely so intracranial air resorbs. See neurosurgery.
• Spinal fusion or discectomy: 10-14 days, with the limiting factor being tolerance of prolonged sitting rather than safety. See spine surgery.
• Knee or hip replacement: around two to three weeks, driven by clot risk. See joint replacement.
• Kidney transplant: four to six weeks, because immunosuppression is still being stabilised. See kidney transplant.
• Liver transplant: around three months in India in total. See liver transplant.
• Cancer surgery: two to three weeks, though the bigger question is usually whether you are flying home between cycles at all. See cancer treatment.

Making the flight itself safer

Ask your surgeon whether you should be on blood thinners for the journey — after joint replacement the answer is frequently yes. Wear graduated compression stockings if advised. Book an aisle seat and get up every hour or two; if you cannot walk, do ankle pumps in the seat. Drink water steadily and skip alcohol. Keep painkillers, blood thinners and any transplant medication in hand luggage, never in the hold.

Paperwork to carry

Take your discharge summary, operative note, current medication list and any implant card in your hand baggage, in English. If you are flying within a few weeks of major surgery, ask the hospital for a fit-to-fly letter — some airlines request one, and it is far easier to obtain before you leave than from another country.

Do not book the return flight early

This is the practical advice that saves the most money and stress. Surgery dates hold reasonably well; discharge dates move. Book a flexible return, or book it once your surgeon has given a date. Rebooking a fixed fare from abroad, while recovering, costs more than the flexibility premium ever does.