Fit-to-fly paperwork: what to confirm with your airline
Informational content from Dr. Pedro Yelamo Vera's site. This version is not documented as medically reviewed by him.
Need fit-to-fly paperwork? Ask your airline what it accepts before booking. A GP can assess your situation, but a certificate is not guaranteed.
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Fit-to-fly paperwork is set by each airline, not by medicine: before you book any certificate, get your airline's exact requirements in writing — what form they need, how recent it must be, and who must sign it. Then a GP can assess whether your situation fits those rules.
- Every airline sets its own fit-to-fly rules — ask their medical desk first, in writing.
- Common triggers: recent surgery, late pregnancy, illness needing oxygen, and travel within days of hospital discharge.
- Certificates usually must be issued close to the travel date, often within 48 hours to 7 days.
- A GP can assess you and, where clinically appropriate, issue a letter — but no certificate is ever guaranteed.
Why this matters
You booked a flight, then something changed: surgery last month, a pregnancy now well along, a hospital discharge days before departure. The airline mentions a "medical certificate" and suddenly you are asking a doctor for a document you have never seen, in a country whose forms you do not know.
The order of operations matters more than anything else here. People waste money and miss flights by getting a letter first and discovering the airline wanted a specific form, signed by a specialist, issued within 48 hours. Work in the other direction and the whole thing usually resolves in one or two steps.
Step one: get the airline's requirements in writing
Every airline maintains its own medical desk or policy page. Before any appointment, ask them — ideally by email, so you have it in writing:
- Which form? Some airlines accept a simple doctor's letter; others require their own medical information form (often called a MEDA or medical clearance form).
- Who signs it? Your GP may be acceptable, or the airline may require the treating specialist or surgeon.
- How recent? Certificates typically must be dated close to travel — commonly within 48 hours for post-surgery cases, up to a week for others. An old letter is worthless.
- What exactly must it state? Some want a generic "fit to fly"; others want specific statements — that you need supplemental oxygen, that you may fly at cabin pressure, how many weeks pregnant you are.
Email your airline's medical or special assistance desk with your dates and situation, and keep the reply. That reply is your brief for the GP consultation.
Situations that typically trigger fit-to-fly paperwork
- Recent surgery — airlines commonly ask for clearance after operations within a set window, which varies by surgery type.
- Late pregnancy — most airlines accept uncomplicated singleton pregnancies up to around week 36 (earlier for multiples), and ask for a certificate beyond a threshold around week 28. Thresholds differ by airline, so check yours.
- Recent hospital discharge or serious illness — travel within days of discharge often needs written clearance.
- Oxygen or medical equipment on board — needs airline approval in advance, sometimes weeks ahead.
- A new or unstable condition — a recent diagnosis that could worsen mid-flight.
If any of these come with urgent symptoms — chest pain, breathlessness at rest, bleeding — the question is not paperwork: get medical care now, and call 112 if it is severe.
What a GP consultation can and cannot do
Can: assess your situation against the airline's written requirements; review your history, medication and recent events; and, where clinically appropriate, following a genuine evaluation, issue a fit-to-fly letter or complete an airline's form. A video consultation works for many of these cases because the assessment is largely conversational — but the doctor decides that during the call, not before.
Cannot: guarantee any letter before the consultation; sign as your treating specialist when they are not; issue anything that contradicts what the assessment finds; or handle situations that genuinely need hands-on examination — those get referred, honestly and clearly.
Two practical notes:
- Timing is everything. Because certificates must be recent, book the consultation as close to departure as the airline's rules allow — and confirm the airline accepts a letter from a GP who is not your regular doctor, which is normally fine, but costs nothing to confirm.
- Bring the airline's exact wording. A screenshot of their requirement turns a 15-minute consultation into a 10-minute one and eliminates the guesswork.
Questions travelers ask
How much does a fit-to-fly certificate cost?
It varies by provider and complexity; expect a consultation fee plus, with some providers, a separate certificate fee. Ask before the appointment so there are no surprises — and remember the cheaper option is the one that actually meets the airline's requirements the first time.
Can a video GP issue a fit-to-fly letter?
Often yes, where the assessment can be done properly over video and the airline accepts a GP letter. Where clinically appropriate, following a genuine evaluation, a Spanish-issued letter or completed form may be provided. The doctor makes that call during the consultation — booking does not create an entitlement to the document.
I am pregnant and flying home from Spain — what do I need?
Check your airline's pregnancy policy first: the week threshold and whether they want a certificate. If they do, a GP can examine nothing hands-on anyway — but will confirm your dates, review the pregnancy's progress as reported, and issue a letter stating the gestation where the evaluation supports it. Carry your maternity record to the consultation.
What if my airline requires a specialist's signature?
Then the letter must come from the specialist treating that condition. A GP can help you get there faster: explaining what the specialist needs to state, and preparing a summary so the specialist's appointment is short.
How far in advance should I sort this out?
Start the airline email exchange as soon as the situation arises, and book the GP consultation to land within the airline's recency window — often the last two or three days before flying. Oxygen approvals and complex clearance can need weeks; simple letters, days.
One last thing
Everything in this article bends on one habit: get the requirement in writing first. Travelers who do almost always resolve fit-to-fly in a single consultation. Travelers who guess buy two certificates and still miss the flight.
FAQ
What is a fit-to-fly certificate?
A medical letter or completed form stating a traveler is fit to fly, sometimes with specific statements (pregnancy weeks, oxygen need, recent surgery). Requirements are set by each airline, not by law.
How recent must a fit-to-fly letter be?
Typically within 48 hours to 7 days of travel, depending on the airline and the situation. Always confirm the exact window with the airline in writing.
Can an online GP in Spain issue fit-to-fly paperwork?
Where clinically appropriate, following a genuine evaluation, yes — if the airline accepts a GP letter and the assessment can be done properly by video. It is never guaranteed in advance.
When do airlines require medical clearance to fly?
Commonly for recent surgery, late pregnancy, recent hospital discharge, onboard oxygen or medical equipment, and unstable conditions. Thresholds vary by airline.
Can I fly at 34 weeks pregnant from Spain?
Many airlines allow uncomplicated singleton pregnancies to around 36 weeks and require a certificate beyond around 28 — but rules differ, so check your airline's policy before booking anything.
What if I feel unwell shortly before my flight?
For severe symptoms — chest pain, breathlessness, bleeding, fainting — seek medical care immediately and call 112 if it is urgent. Flying comes second to your health.