Flying with cancer: questions to resolve with your doctor first
This page doesn’t tell you whether you’re fit to fly — only your treating doctor can answer that for your specific case. What it does is collect the questions worth asking, each linked to the official aviation-health source that explains the general process.
Recent surgery
How soon after your specific procedure does your surgeon consider flying safe, given how it was performed and how your recovery is going? Airlines and aviation-health guidance generally defer to your own treating doctor’s judgment on timing rather than a universal rule — that judgment is the one that matters for your case.
CAA — getting medical clearance to fly (opens in a new tab)Blood counts and anemia
Cabin pressure means lower oxygen availability than at ground level — does your doctor consider your current blood counts stable enough for that, or would they want counts rechecked close to your travel date first?
CAA — guidance for health professionals on assessing fitness to fly (opens in a new tab)Blood clot (DVT) risk
Long-haul flights carry a general, well-documented increase in blood-clot risk from prolonged immobility — does your doctor recommend anything specific for you, given your treatment and any other risk factors, beyond the general in-flight movement advice every passenger gets?
WHO — travel and health (opens in a new tab)Oxygen needs
If you use or might need supplemental oxygen, does your doctor think you’ll need it in flight — and if so, what does your specific airline require to arrange it in advance? Airlines generally require written approval and advance notice for any oxygen equipment brought on board.
CAA — travelling with medicines, mobility and medical equipment (opens in a new tab)In-flight medication and cold-chain drugs
If part of your treatment needs refrigeration, ask your pharmacist or treating team how it should be carried and for how long it stays stable at room or cabin temperature, and confirm with your airline what documentation (a doctor’s letter, in most cases) lets you carry it through security and onboard without it being treated as a standard liquid.
CAA — travelling with medicines, mobility and medical equipment (opens in a new tab)