Chickenpox Fit to Fly Certificate, Illness or Surgery: When Airlines Ask for a Doctor's Letter in Spain
Medically Reviewed by Dr. Pedro Yelamo Vera, MD
Licensed Physician No. 484814280 · Official Medical College of Bizkaia (Spain)Last reviewed: 21 October 2026
Chickenpox fit to fly certificate, illness or recent surgery: when airlines ask for a doctor's letter in Spain and what an online GP can assess.
You don't have to figure this out alone
Dr. Pedro Yelamo Vera is an independent, bilingual GP licensed in Spain. Book a 15-minute video consultation in English or Spanish for €50, with a private electronic prescription issued under Spanish law when clinically appropriate.
You do not need a fit to fly certificate just because you travel to or from Spain. You need one only if your airline asks, because of recent surgery or illness, chickenpox, a fresh cast, late pregnancy or equipment on board. Ask the airline first, in writing; then a GP licensed in Spain can assess you by video.
- Your airline, not your doctor, decides which fit-to-fly paperwork you need. Ask its medical team in writing before booking any assessment.
- Common triggers: recent surgery or hospital stay, chickenpox or another infection, a cast under 48 hours old, pregnancy after week 28, and oxygen or equipment on board.
- Some airlines accept a GP letter; others want their own form (often called a MEDIF) or a specialist's signature.
- Many airlines only accept a letter dated shortly before the flight. Ask for the exact time window.
- A video GP reviews your records, checks your risk and, if clinically appropriate, issues a bilingual letter. Some cases need an in-person exam.
- The assessment is a €50, 15-minute video visit; the letter is included. Neither issuance nor acceptance of a certificate is guaranteed.
- Chest pain, breathlessness at rest, bleeding or stroke signs mean 112, not paperwork.
Do I need a fit to fly certificate for Spain?
No. Spain does not require one, and neither does any destination simply because you fly from Spain. The requirement comes from your airline's medical policy and your health. If you are well and nothing recent has happened, you board like anyone else.
The need appears after the trip is booked: an operation, a hospital stay, a child with chickenpox, a pregnancy now well along. The airline then mentions a “medical certificate”, also called a fit to fly certificate or medical clearance. People lose money and miss flights when they get a letter first, then learn the airline wanted its own form, signed by a specialist, within a set number of days. Start with the airline.
Why do airlines ask about your health?
Because the cabin is pressurised only to the level of a place about 1,800–2,400 metres (6,000–8,000 feet) high. There is less oxygen in your blood, and any gas trapped in the body expands by roughly 25–30%. Most healthy people do not notice. After recent surgery, a collapsed lung, a bad chest infection or a heart problem, these changes can be risky, so some airlines want a doctor to confirm you are stable enough to fly.
Which airlines ask for what?
Every airline has its own medical policy and team. Before any appointment, email them your dates and situation so the answer is in writing. Ask four questions:
- Which form? Some airlines accept a simple doctor's letter. Others want their own medical form, often called a MEDIF.
- Who signs it? A GP may be fine, or the airline may want the specialist or hospital team who treated you.
- How recent? Many airlines only accept a letter dated shortly before the flight. Ask for the exact window; an older letter may be refused.
- What must it say? Some airlines just want the words “fit to fly”. Others want your due date, your need for oxygen or the date of your operation.
| Airline | What to confirm before booking an assessment |
|---|---|
| Ryanair | Its Fit to Fly form is needed when fitness to travel is in doubt after a recent illness, hospital stay, injury or surgery, for unstable conditions, and for medical equipment or oxygen on board. |
| easyJet | Rules per condition, including recent illness, surgery and oxygen. Chickenpox: travel from 7 days after the last new spot. Pregnancy needs no certificate; it carries you to the end of week 35. |
| Other airlines | Rules differ widely. Check the medical conditions page, then confirm by email which form, signature and time window apply. |
Read the official Ryanair fit-to-fly guidance and easyJet medical conditions guidance. Policies change, so confirm the current rule for your flight. Keep the reply: it is your checklist for the doctor's visit.
When do airlines ask for a fit to fly letter?
After surgery
Airlines often ask for clearance for a set time after an operation. The window depends on the surgery; for many procedures, including laparoscopy, it is a minimum of about 5–10 days. Your surgical team's advice counts as much as the airline's rule.
Pregnancy
Many airlines carry an uncomplicated single pregnancy until around week 36, with an earlier limit, around week 32, for twins. After week 28, the airline may ask for a letter confirming your due date and that there are no complications. Rules differ: easyJet needs no certificate and carries you to the end of week 35. A video doctor cannot examine you, but can confirm your dates from your maternity notes and, if the assessment supports it, issue a letter stating how many weeks pregnant you are.
Chickenpox and other infections
Chickenpox spreads easily. The NHS says you are infectious from 2 days before the spots appear until all have formed scabs, about 5 days after they first appeared. Airlines set their own rules: easyJet lists travel from 7 days after the last new spot; others may ask for a chickenpox fit to fly certificate, a short doctor's letter saying you are no longer infectious and fit to fly. A doctor can only write it after assessing you.
On a video call, the doctor reviews your spots on camera and asks when the first and last new spots appeared. If the image is unclear, the doctor may ask for photos or advise an in-person check. The letter describes only what the doctor finds on the day. Feeling recovered is not the same as being no longer infectious; you can feel well while some spots have not scabbed over. Your airline has the final say.
Children and adults share the same infectious period. The NHS advises staying away from school, nursery or work until all spots have scabbed; your airline's rule may be stricter. A sibling who has not had chickenpox may fall ill 1 to 3 weeks later, so plan for this if your return flight falls in that window. Chickenpox is dangerous for newborns, anyone pregnant and people with a weakened immune system; keep away from them while infectious. If you are pregnant, have never had chickenpox and have been exposed, get medical advice promptly. For discomfort the NHS suggests paracetamol; do not take ibuprofen for chickenpox unless a doctor tells you to, because it may cause serious skin infections.
The same applies after measles, flu or a bad chest infection: the airline may want confirmation that you are no longer contagious.
Fractures and casts
A cast applied within the last 48 hours must often be split (bivalved) before flying, because swelling under a rigid cast is dangerous at altitude. Airlines may also ask for a doctor's clearance. Ask the team that fitted the cast.
A recent hospital stay, oxygen or an unstable condition
Flying within days of leaving hospital often needs written clearance. Oxygen or medical equipment on board needs the airline's approval in advance, sometimes weeks ahead. A new or unstable diagnosis that could worsen in flight also triggers a request. With chest pain, breathlessness at rest or bleeding, forget the paperwork and call 112.
What can a video GP assess, and what needs an in-person exam?
A video GP can check your situation against the airline's written rules and, if clinically appropriate, issue a letter or complete the airline's form. A video GP cannot promise a letter, sign as your specialist, or write anything the assessment does not support.
In the fit to fly video assessment, Dr. Pedro Yelamo Vera works through four steps:
- Records review: hospital discharge summary, operation notes, ultrasound or scan reports, and your list of medicines.
- Risk check: your breathing reserve, how you may cope with pressure changes, and your risk of a blood clot in the leg (deep vein thrombosis, DVT).
- A letter, only if appropriate: a signed letter in English and Spanish with the doctor's licence number (Colegiado No. 484814280), or the airline's form. You may need an in-person exam or more records first. The airline decides whether to accept it.
- Advice for the flight: compression stockings, fluids, moving around on board and timing your medicines across time zones.
Video works for many cases because much of the assessment is a conversation. Anything that needs hands-on examination, listening to your chest, measuring oxygen levels or imaging needs an in-person visit, and you are told where to go. If it is too early to fly, the doctor says why and when to be reassessed. If the airline wants a specialist's signature, the letter must come from that specialist; a GP can still prepare a summary so that appointment is short. Neither issuance nor acceptance of a certificate is guaranteed.
Book the visit inside the airline's time window, and check that the airline accepts a letter from a doctor who is not your regular doctor; it costs nothing to ask.
What other travel medical certificates can an online GP issue?
A medical report for your travel insurer after an illness in Spain, a letter confirming the medicines you carry, and medical certificates for a tour operator or employer, each within the same €50 visit and only where the assessment supports it. For vaccines and pre-trip planning, see travel medicine.
What should I have ready for the consultation?
- The airline's written requirement, or a screenshot of its policy page.
- Your flight dates and flight numbers.
- Any discharge summary, operation notes or scan reports.
- Your maternity notes, if you are pregnant.
- A list of the medicines you take, or photos of the boxes.
- For chickenpox: the dates of the first and last new spots, good light so the doctor can see the skin, and the child on the call with a parent or guardian.
How much does a fit to fly certificate cost in Spain?
With Dr. Yelamo, the assessment is a €50, 15-minute video visit and the letter is included; there is no separate certificate fee. Some providers charge a letter fee on top, so ask before you book. You receive an itemised invoice; cancellations are free at least 24 hours in advance. The cheapest option is always the one the airline accepts the first time.
Visits run every day, 07:30–20:30 (Spain time); choose an available time in the live calendar. Email the airline as soon as the situation arises, then book inside its window.
Flight booked, airline rule in hand? Get your records reviewed by a doctor who knows what airlines ask for.
Dr. Pedro Yelamo Vera assesses fitness to fly by video every day from 07:30 to 20:30 (Spain time), in English or Spanish, and issues a bilingual letter where the assessment supports it.
Emergencies
Some conditions mean you must not fly until a doctor confirms you are stable: a heart attack in the last 10–14 days, or chest pain at rest or with little effort (unstable angina); an untreated collapsed lung (pneumothorax); very high blood pressure that is not under control, or a stroke in the last 10–14 days; and recent eye surgery with a gas bubble in the eye. Your doctors and airline will say how long to wait.
Call 112 now, and forget the paperwork, if you have chest pain, sudden breathlessness, heavy bleeding, fainting, a seizure, or stroke signs such as a drooping face, a weak arm or slurred speech. If chickenpox blisters become red, hot or painful, or breathing gets harder, seek medical help without delay. None of these is a video visit; see when to go to the ER instead of an online doctor.
Frequently asked questions
Is an online fit to fly certificate accepted by airlines?
It depends on the airline's rules. Before you book, check which form it needs (a letter or a MEDIF) and whether it accepts a video assessment and a GP's signature. Neither issuance nor acceptance of a certificate is guaranteed.
How recent must a fit-to-fly letter be?
It depends on the airline and your situation. Many airlines only accept a letter dated shortly before the flight. Ask the airline for the exact time window, in writing, and book your assessment inside it.
How long does it take to get a fit-to-fly letter?
It depends on the appointment you choose, your assessment, the records needed and whether you need an in-person check. Oxygen approval and complex clearance can take weeks, so check the airline's deadline first.
Can I fly at 34 weeks pregnant from Spain?
Many airlines carry an uncomplicated single pregnancy at 34 weeks, but rules differ. Some ask for a doctor's letter after week 28, and limits are earlier for twins. Check your airline's policy before you book.
Do I need a chickenpox fit to fly certificate?
Only if your airline asks for one. Some airlines use a fixed rule, such as 7 days after the last new spot; others want a doctor's letter confirming you are no longer infectious. A doctor writes it only after assessing you, on camera or in person.
Can an online GP prescribe medicine for fear of flying?
No. Benzodiazepines and sleeping tablets are not prescribed by video. If you are anxious about flying, the doctor can talk through your symptoms and non-drug ways to cope, and refer you to in-person care if you may need medication.
How much does a fit to fly certificate cost in Spain?
With Dr. Pedro Yelamo Vera the letter is part of the €50, 15-minute video visit, with an itemised invoice. It is issued only if the assessment supports it, and the airline decides whether to accept it.
Medical Citations & Sources
This content is written and reviewed by a licensed physician with reference to the following official health authorities.
