Flying After a Hip or Knee Replacement: Blood Clots, Timing and Practical Tips

There is no single rule. The decision belongs to your operating surgeon, based on how your surgery went, how well you are moving, the length of the flight and your personal risk of blood clots.

What is clear from UK guidance is that long flights are treated much more cautiously than short ones, and that blood-clot prevention after surgery matters more than any fixed number of days.

• Long-haul flights. UK guidance generally advises avoiding long-haul flights for around three months after a hip or knee replacement. The Royal Orthopaedic Hospital in Birmingham, for example, recommends waiting three months before travelling for periods longer than four hours.
• Short-haul flights. A 2023 review of UK practice notes that NICE's travel guidance suggests short-haul flights may be possible after about six weeks.
• What surgeons actually advise. The same study surveyed UK hip and knee consultants: advice on avoiding short-haul flights ranged from 14 to 180 days — there is no consensus.
• Airlines. Some airlines restrict flying for 7 to 14 days after surgery or ask for a fit-to-fly letter.
• Evidence. Studies of patients who flew in the early weeks after joint replacement while taking blood-clot prevention found low rates of symptomatic clots, and the authors concluded that allowing air travel appears to be a safe practice — but these findings don't replace your surgeon's assessment.

In short: a short flight is viewed very differently from a long-haul one, and your own risk factors matter more than the calendar.

Hip and knee replacement raise the risk of deep vein thrombosis (DVT), which is why hospitals start prevention straight after the operation. In England, NICE guideline NG89 lists these options:

Hospitals abroad follow their own protocols, which may differ. Ask what you will be given, for how long, and make sure you have enough medication to finish the course at home.

The further away the hospital, the more the flight home becomes a medical question. A destination that needs a long-haul flight means either a long stay abroad or flying within a period UK guidance treats with caution.

That is one reason we work with a hospital close to the UK: London Luton to Wrocław is a direct flight of about two hours. You still fly only when your surgeon clears you.

• Book special assistance with the airline in advance — wheelchair help through the airport and priority boarding make a big difference in the early weeks.
• Choose an aisle seat with extra legroom if you can, so you can stretch and get up.
• Keep moving: do ankle and calf exercises in your seat and walk the aisle when it's safe to do so.
• Drink plenty of water and avoid alcohol and sleeping tablets.
• Wear compression stockings if your medical team has advised them.
• Take your blood-thinning medication on schedule and carry it in your hand luggage.
• Carry your medical letter and implant details, and check whether your airline needs a fit-to-fly letter.

The risk of a clot continues for weeks after surgery, not just during the flight.

• Leg: throbbing or cramping pain in one leg, swelling, or warm, red or darkened skin — contact NHS 111 or your GP urgently.
• Chest: breathlessness or chest pain, especially when breathing in — call 999 or go to A&E.

See also our surgery abroad safety checklist.