Broken ribs are among the commonest injuries from a fall, a road collision or a ski accident. Most heal on their own over a matter of weeks, and most people with them can fly.
What decides it is the lung underneath: whether it has been punctured, and whether anyone has checked.
Why the pneumothorax is the question
A broken rib can tear the thin lining around the lung, or the lung itself, letting air into the space between the lung and the chest wall. That is a pneumothorax, and the lung partly collapses as the air builds up.
On the ground, a small pneumothorax may cause few symptoms and may be left to settle on its own. In the air it behaves differently. A commercial cabin sits at the equivalent of roughly 6,000 to 8,000 feet, the cabin altitude, and at that lower pressure trapped air expands. A small, stable collapse can enlarge, and at worst can become a tension pneumothorax, which compresses the heart and the other lung and is life-threatening. On a scheduled flight there is nobody equipped to treat it and the nearest runway may be hours away.
That is why a current pneumothorax is widely regarded as a reason not to fly on a commercial aircraft, a position reflected in guidance from the British Thoracic Society and the UK Civil Aviation Authority.
Two things make broken ribs tricky. A pneumothorax can be small enough to be missed on a plain chest x-ray, where a CT scan would show it. And it can develop after the injury, sometimes days later, in a patient whose first x-ray was clear. A clear x-ray on the day of the fall is reassuring, but it should not be the last one.
How long people commonly wait
Broken ribs with no pneumothorax. There is no fixed interval. The decision rests on pain, breathing and whether the patient can manage the journey. Somebody with one or two simple fractures, good pain control and normal oxygen levels can often travel quite soon. Several fractures, an older patient, or bruising to the lung underneath call for more caution, because the main risk shifts to the chest infection that can follow when breathing is shallow.
Broken ribs with a pneumothorax. Published guidance, including from the British Thoracic Society, commonly applies an interval after an x-ray confirms that the lung has fully re-expanded. The figure most often given is around one to two weeks from that x-ray, with pneumothorax caused by injury commonly placed at the longer end. The clock starts at confirmed resolution, not at the date of the injury or the date the drain came out.
A patient who still has a chest drain in place is still being treated and is not fit for a commercial seat. Blood in the chest, known as a haemothorax, is treated with the same caution.
Flail chest, where a section of ribs is broken in more than one place and moves separately from the rest of the chest wall, is a serious injury that usually needs hospital care, and it is not a commercial travel question until the treating team say otherwise.
Pain, breathing and the journey
Even without a pneumothorax, broken ribs make a flight harder than people expect.
Pain stops you breathing deeply and coughing properly. Secretions build up in the base of the lungs, and a chest infection can follow, particularly in older patients and smokers. If one does, can you fly with a chest infection covers what changes.
Then there is the airport. Lifting a case, walking long distances, sitting upright for hours, and the jolt of turbulence against a seatbelt are all harder with a fractured chest wall. Wheelchair assistance and someone to carry the bags remove most of it, and both should be booked in advance.
A pain relief plan for the whole journey matters more than for many injuries, including enough medication in hand luggage to cover delays. Ask the treating team whether you are well enough to fly on the medication you are taking, because strong painkillers can also make breathing shallower.
A letter from the treating doctor setting out the injury, the scans and the date of any pneumothorax and its resolution answers most of what an airline will ask. If the airline wants a fit to fly certificate, that letter is the basis of it.
If you are stuck abroad, or managing a case
In repatriation work, rib fractures are rarely the only injury. They come with a fractured limb, a head injury or a bruised lung, and a pneumothorax treated with a chest drain is a familiar part of the picture. The patient often feels ready to go home well before the chest is.
The documents that matter are the CT report, the date the drain was removed, and the date of the x-ray confirming the lung had re-expanded. A further x-ray shortly before travel is a sensible check, and it should be reviewed by someone accountable for fitness to fly rather than filed.
Where the patient needs to move before the lung is safe for a commercial cabin, an air ambulance is the usual answer, partly because some can fly with the cabin held at a lower altitude. That costs time and fuel and is a clinical decision, not a default, as set out in what good repatriation actually looks like.
If you are arranging this for a family member or managing it for an insurer, medical repatriation and patient transport explains how a move is planned around the injury rather than the booking.
