Fit To Fly Pregnancy Rules For Different Airlines
Airlines have widely varying policies on when pregnant passengers require medical documentation to fly — and when they cannot fly at all. The differences matter because booking at 30 weeks with one airline may be straightforward, while the same journey with another carrier requires a doctor’s letter. Getting this wrong can mean being refused boarding at the gate, or travelling without adequate evidence for travel insurance. This guide covers the pregnancy flying rules for the main UK and international carriers, the health considerations specific to pregnancy, and when you need a formal fit to fly certificate.
General rule: Most airlines allow uncomplicated single pregnancies to fly up to 36 weeks without a letter. After 28 weeks, most require medical clearance. For twin or multiple pregnancies, the cut-off is typically 32 weeks. Always check your specific carrier before booking. Get a pregnancy fit to fly certificate online →
Pregnancy Flying Rules by Airline
The following table summarises the pregnancy documentation requirements for major UK and international airlines. Policies can change — always verify directly with your airline before travel, particularly if you are close to the cut-off date.
| Airline | Single Pregnancy: No Letter Required | Single Pregnancy: Letter Required | Absolute Cut-Off | Multiple Pregnancy Cut-Off |
|---|---|---|---|---|
| British Airways | Up to 28 weeks | 28–36 weeks (letter required from 28 weeks) | After 36 weeks | After 32 weeks |
| easyJet | Up to 27 weeks | 27–35 weeks (letter or MATB1 required) | After 35 weeks | After 32 weeks |
| Ryanair | Up to 28 weeks | 28–36 weeks (letter required, issued within 30 days of travel) | After 36 weeks | After 32 weeks |
| Jet2 | Up to 28 weeks | 28–36 weeks (letter required) | After 36 weeks | After 32 weeks |
| TUI | Up to 28 weeks | 28–36 weeks (letter required) | After 36 weeks | After 32 weeks |
| Emirates | Up to 29 weeks | 29–36 weeks (MEDIF or doctor’s letter required) | After 36 weeks | After 32 weeks |
| Lufthansa | Up to 36 weeks (single, uncomplicated) | Complications at any stage require clearance | After 36 weeks | After 32 weeks |
| Virgin Atlantic | Up to 28 weeks | 28–36 weeks (letter required) | After 36 weeks | After 32 weeks |
Check directly with your airline: The above reflects general policy as at early 2026. Airline policies are updated periodically and can vary by route (e.g., some carriers impose earlier cut-offs for very long-haul routes). Always verify on the airline’s official website before booking if you are in the third trimester.
What a Pregnancy Fit to Fly Letter Must Include
Most airlines specify exactly what a pregnancy fit to fly letter must contain. A letter that omits required information will typically be rejected at the gate, even if it is from a registered doctor. The standard requirements are:
- Your full name and date of birth
- Confirmation of the estimated due date (EDD) or gestational age at the date of travel
- Confirmation that the pregnancy is uncomplicated and you are fit to fly
- The clinician’s name, GMC registration number, signature, and practice address
- The date the letter was issued (many airlines require it within 7–30 days of travel)
Some airlines (including easyJet) will also accept the NHS MATB1 certificate as evidence of gestational age, but this does not confirm fitness to fly on its own — a separate fit to fly statement from a clinician may still be required. Check your airline’s specific requirements.
Complications That Affect Fitness to Fly
Even within the standard permitted flying window, certain pregnancy complications may mean you are not fit to fly regardless of gestational age. Conditions that typically require individual clinical assessment before flying include:
- Placenta praevia
- Pre-eclampsia or severe hypertension in pregnancy
- Severe anaemia
- Threatened preterm labour or a history of preterm labour
- Recent significant bleeding
- Multiple pregnancy with complications
- Significant foetal growth restriction
If any of these apply, your midwife or obstetrician needs to assess your individual fitness to fly before a certificate can be issued. An online GP consultation alone may not be sufficient — specialist input may be required.
Health Considerations When Flying During Pregnancy
Even with a fit to fly certificate, certain precautions during flight reduce the risks associated with flying in pregnancy:
Deep vein thrombosis (DVT): Pregnancy significantly increases DVT risk, and immobility during flight increases it further. For flights over four hours, wear graduated compression stockings (Class 1 or 2, prescribed by your GP or midwife), move your legs regularly, and stay well hydrated. Your GP may prescribe low-molecular-weight heparin (LMWH) injections for high-risk pregnancies on long-haul routes.
Dehydration: Cabin air is very dry (typically 10–20% relative humidity). Drink water regularly throughout the flight rather than waiting until you feel thirsty. Avoid excess caffeine and alcohol.
Seat choice: An aisle seat makes it easier to stand and move regularly. If you are past 30 weeks, a bulkhead or aisle seat gives more space and avoids having to climb over other passengers.
Altitude and oxygen: Cabin pressure is equivalent to approximately 6,000–8,000 feet. This is well tolerated by most uncomplicated pregnancies, but if you have any anaemia or cardiac conditions, discuss with your clinician before flying.
Seatbelt position: Wear the lap belt below your bump, not across it, to reduce abdominal pressure in the event of turbulence.
Travel Insurance and Pregnancy
Many standard travel insurance policies exclude pregnancy from coverage unless you purchase a policy that specifically includes it. Even policies that cover pregnancy may exclude claims related to pre-existing complications or claims that arise after a set gestational age (commonly 28 weeks). Before travelling in the second or third trimester, check your policy carefully:
- Does the policy cover pregnancy complications as a reason for cancellation?
- Does it cover emergency obstetric care at the destination?
- Does it cover early return if you go into labour unexpectedly?
- Is there a gestational age cut-off after which pregnancy is excluded?
If your insurer requires a fit to fly letter as proof of fitness at the time of booking or travel, a certificate from a registered UK clinician will typically satisfy this requirement.
Need a Pregnancy Fit to Fly Certificate?
GMC-registered doctors can issue pregnancy fit to fly certificates online — accepted by all major UK airlines. Quick turnaround, no in-person appointment needed.
Frequently Asked Questions
At what stage of pregnancy do I need a fit to fly letter?
For most major airlines, a fit to fly letter is required from 28 weeks of pregnancy for a single uncomplicated pregnancy. Before 28 weeks, most carriers do not require documentation. For multiple pregnancies (twins or more), the threshold is usually 32 weeks. However, individual airline policies vary — easyJet requires documentation from 27 weeks — so always check with your specific carrier before booking.
Can my GP or midwife issue a fit to fly letter?
Yes. A fit to fly letter can be issued by your GP, midwife, or obstetrician — any registered clinician who has reviewed your pregnancy and is satisfied that flying is safe. The letter should include your estimated due date or gestational age at the date of travel, the clinician’s name and GMC number, and the date of issue. Online GP services can also issue pregnancy fit to fly letters following a consultation, provided the pregnancy is uncomplicated.
Is it safe to fly in the first trimester?
Flying in the first trimester (up to 12 weeks) is generally considered safe for uncomplicated pregnancies, and no letter is required. The main concerns in early pregnancy are nausea, fatigue, and the slightly elevated DVT risk — none of which are typically made significantly worse by flying. However, if you are experiencing complications such as threatened miscarriage or significant bleeding, seek advice from your midwife or GP before flying.
What happens if I go into labour on the plane?
The aircraft crew will request medical assistance from any qualified medical personnel on board and may divert to the nearest airport. Responsibility for medical care on board varies by jurisdiction but the aircraft captain has overall authority. Emergency landings for obstetric reasons do occur. This is one of the reasons airlines impose cut-offs for late-stage pregnancy — and why travel insurance that covers obstetric emergencies is essential if you are flying past 28 weeks.
Do I need a fit to fly letter for a domestic UK flight during pregnancy?
UK domestic flights are typically one to two hours, and most airlines apply the same pregnancy policy for domestic and international routes. If you are past 28 weeks, check your airline’s policy for domestic flights — some carriers apply their standard pregnancy documentation requirement regardless of route length. A letter from your GP confirming gestational age and fitness to fly will satisfy the requirement if asked.
Can I fly with a twin pregnancy?
Yes, with appropriate clearance. For twin pregnancies, most airlines require medical documentation from 32 weeks and will not carry twin pregnancies beyond 32 weeks at all. Before that point, a fit to fly certificate confirming the gestational age and that the pregnancy is uncomplicated is typically required. Twin pregnancies carry a higher risk of preterm labour, so discuss the specific risks with your obstetrician before flying in the third trimester, even within the permitted window.