AirAdvisor+ launches soon
Get up to €10,800 for a disrupted trip
Automatic protection. No claims. No waiting.
By joing, I agree to receive product updates. Opt-out anytime. Privacy Policy
Flying While Pregnant: Risks, Airline Policies, and Tips for a Safe Journey
Flying while pregnant can feel like a big decision. Growing a baby changes the way many women think about travel, and it’s natural to wonder whether being thousands of feet in the air is a good idea. The reassuring news is that for most healthy pregnancies, air travel is considered safe.
Still, there are important things to understand about how flying affects your body, what risks to keep in mind, and how to make your journey as comfortable and stress-free as possible. This guide takes you step by step through medical insights, practical tips, and airline policies so you can travel with confidence.
Understanding Your Body at High Altitude
Swelling in your feet & ankles
Pregnancy brings significant changes to your body that help support your growing baby, but these changes can also make you feel a little different when travelling. Pregnancy causes your blood volume to increase by about 40–50%, and hormonal changes relax the walls of your veins, which can slow circulation in your legs. This slower flow can lead to swelling in your feet and ankles, something many pregnant women notice when standing for long periods.
Lower oxygen levels
During a flight, the air in the cabin is pressurised to simulate being at about 6,000–8,000 feet above sea level. This means the air is less dense, with slightly less oxygen in every breath. For healthy pregnancies, this isn’t a problem. Your body adjusts by slightly increasing your breathing and heart rate, ensuring your baby continues to receive oxygen through the placenta. Fortunately, a 2013 study from the Royal College of Obstetricians and Gynaecologists found this change doesn’t harm your baby, even on long flights.
Dehydration
What you might feel, though, is a drier mouth and skin, because cabin humidity is usually very low. This means that dehydration happens faster, making you feel more tired, but it can also trigger Braxton Hicks contractions in some women. So, drinking plenty of water and avoiding caffeine will help keep you feeling well.
Pregnancy can also affect your balance and make you feel lightheaded more easily. Standing up too quickly on a plane might bring on a dizzy spell, so take your time and use the armrests for support.
The Medical Risks of Flying While Pregnant
Deep Vein Thrombosis (DVT)
One of the most talked-about risks of flying during pregnancy is blood clots, also called deep vein thrombosis (DVT). This is a risk because pregnancy naturally increases your blood’s tendency to clot to protect you from bleeding too much during birth. But on long flights, sitting still for hours allows blood to pool in your legs, which can increase the risk of blood clots.The good news is that DVT is rare, and there are simple ways to reduce your risk even further.
Wearing compression stockings can improve blood flow, and studies show they help prevent swelling in the legs on flights, even if you’re not pregnant. But you might want to try to stand up and walk around the cabin every hour or two. If that’s not possible, do small in-seat exercises such as ankle circles, foot pumps, and knee lifts. Mobile apps like “Move Reminder” or “StretchMinder” can send you gentle alerts during the flight to remind you to stretch and change position.
For more detailed information on DVT prevention and air travel safety in pregnancy, you might want to visit:
Preterm Labour and Miscarriage
It’s natural to worry that flying could trigger labour or cause a miscarriage, but for healthy pregnancies, research does not support these fears. The NHS and the American College of Obstetricians and Gynecologists both confirm that occasional air travel is safe for women without complications.
That said, if you have a high-risk pregnancy, for example, if you’re carrying twins, have placenta previa, or have a history of preterm labour, be sure to check with your doctor before booking your flight. They may suggest additional precautions or recommend avoiding travel altogether.
Cosmic Radiation Exposure
At cruising altitude, passengers are exposed to a bit more cosmic radiation than they are on the ground. For pregnant women, this exposure is extremely small and is not a cause for concern. This is because the levels are far below what would affect fetal development. This really only becomes a consideration for pilots, cabin crew, or very frequent travellers who are exposed daily.
Turbulence and Physical Stress
Many women wonder if turbulence could harm their baby. The answer is no. Your baby is well cushioned in amniotic fluid. Actually, the main risk from turbulence is to you, if you lose your balance. So, always wear your seatbelt low across your hips and under your bump, even when the seatbelt sign is off.
Airline Rules and Medical Guidelines
Airlines want to keep passengers safe, so most have specific policies for pregnant women. Typically, you can fly up to 36 weeks if you’re carrying one baby and up to 32 weeks with twins or more (source: NHS, RCOG, and airline medical guidelines). The NHS and WHO recommend avoiding very long-haul flights in late pregnancy to minimise discomfort and reduce DVT risk.
From 28 weeks onwards, most airlines require a fit-to-fly letter from your GP or midwife confirming your due date and that your pregnancy is uncomplicated. This protects you from being denied boarding.
Here are the pregnancy guidelines for a few major airlines:
- British Airways refund and flight compensation conditions during pregnancy: Fit-to-fly letter from 28 weeks; no travel allowed after 36 weeks (single pregnancy).
- Ryanair: Similar policies to British Airways.
- Delta Airlines (US) flight delay and compensation rules: No strict cut-off but recommends consulting a doctor after 36 weeks.
- KLM flight delay and compensation rules: Requires fit-to-fly letter after 28 weeks; no travel after 36 weeks (single pregnancy).
- easyJet refund and compensation policy for pregnant passengers: Fit-to-fly letter after 28 weeks; no travel after 35 weeks (single pregnancy).
- Wizz Air compensation and refund rules for disrupted flights: Fit-to-fly letter required after 28 weeks; no travel permitted after 34 weeks (single pregnancy).
For full details on airline policies, check the airline’s medical guidelines page.
Delays or Cancellations While Pregnant
If you experience a long delay or cancellation while pregnant, there are a few steps you can take to make the situation more manageable.
- Seek out a quiet spot to rest, hydrate regularly, and keep healthy snacks on hand.
- Ask airline staff if they can assist with finding comfortable seating, a quiet area, or even access to a lounge if you’re feeling very tired. While most airlines don’t have official programmes for pregnant passengers, staff may be willing to help if you explain your situation.
- If you start feeling unwell or overly fatigued, ask airport staff to call for medical support.
If your flight was delayed, canceled or overbooked within the last 3 years, you could be eligible for up to ($650) £520 in compensation.Check Your Flight
Preparing for a Safe and Comfortable Flight
In addition to these tips, carry essentials like:
- A refillable water bottle,
- Healthy snacks,
- Any prescribed medications, and
- A small pillow for lumbar support.
- Pack medical records in case you need to see a doctor during your trip.
To prevent leg swelling and DVT, wear compression stockings and take time every hour to stand, stretch, and move your legs. Simple seated exercises like ankle circles and toe flexes also help circulation.
Mobile apps such as“Hydro Coach” for tracking water intake and “Stand Up! The Work Break Timer” for reminders can be useful tools on a long flight.
Check with official government sources for pregnancy travel tips and printable checklists, including:
When booking your seat, consider an aisle spot so you can stand up and walk around without disturbing others.
Wear loose, breathable clothing and bring extra layers as cabin temperatures can fluctuate.
At the airport, take advantage of assistance services like priority boarding and ask for help with heavy luggage. Security scanners are safe for pregnant women, but you can request a manual pat-down if you’d prefer.
Onboard, stay hydrated by sipping water regularly and avoid too much caffeine. Eating small, regular snacks can help maintain energy and prevent nausea. Take time to move around the cabin or do gentle stretches in your seat.
What to Do in Case of an In-Flight Emergency
Medical emergencies during flights are rare, but cabin crew are trained to assist and can call on medical professionals on board if needed. Also, planes carry emergency kits that include basic equipment for childbirth, though it’s highly unlikely you’ll need it. If your pregnancy is high-risk, consider delaying travel.
To Sum Up
Flying during pregnancy is safe for most women, and with a few thoughtful preparations, it can also be comfortable. Consult your midwife or doctor before travelling, check airline policies, and pack smart. And if your journey is disrupted, AirAdvisor is here to help you claim the compensation you deserve, so you have one less thing to worry about as you focus on your health and your baby.
Find out if you are owed compensation for a disrupted flight.Check Your Flight
Good to know:
- Is it Safe to Use My Cellphone on an Airplane?
- Is it Safe to Fly a Plane In a Thunderstorm?
- Is it Safe to Fly With an Ear Infection?
Author:
Joanna Teljeur
Job/Position: Senior Editor & Content Lead
Joanna Teljeur is a senior editor and writer with 15+ years of experience in editorial leadership, journalism, and content development, specialising in consumer rights, aviation law, and public-interest reporting. Her work focuses on transforming complex regulatory and legal topics into clear, accurate, and accessible content for international audiences.
No feedback
Leave your feedback
Flight Compensation Calculator:
Check if you are entitled to flight delay compensation in just 3 minutes.
