Can you fly while pregnant?

Yes, many people can fly while pregnant. The NHS says flying is not harmful to you or your baby, but any health issues or pregnancy complications should be discussed with your midwife or doctor before you travel.

How far along you are, the length of the flight, your individual health and your airline’s rules can all affect your plans. Airlines may also ask for medical documentation later in pregnancy, so checking the details before booking can save you an awkward surprise at the airport.

If your pregnancy has not been straightforward, personalised advice matters more than general travel guidance.

When can you fly during pregnancy?

There is no single week at which flying suddenly becomes unsafe for every pregnancy.

The Royal College of Obstetricians and Gynaecologists (RCOG) says that occasional air travel is not harmful during an uncomplicated pregnancy. Its current patient guidance says the safest time to fly is before 37 weeks if you are carrying one baby, and before 32 weeks if you are carrying uncomplicated twins.

This is partly because the possibility of going into labour increases as pregnancy progresses, and an aircraft is not an ideal place to manage an unexpected obstetric emergency.

The NHS similarly notes that the chance of going into labour is naturally higher after 37 weeks, or at around 32 weeks if you are carrying twins.

Your own circumstances may mean different advice is appropriate, so speak to your maternity team if you have any health concerns or pregnancy complications.

Why airline rules matter

Being medically able to fly and being permitted to board are not always the same thing.

Airlines set their own pregnancy policies, including limits on how late in pregnancy they will carry passengers. Check the policy for both your outward and return flights, particularly if your trip falls later in pregnancy.

The NHS says that after 28 weeks, an airline may ask for a letter from your doctor or midwife confirming your due date and that you are not considered at risk of complications.

RCOG also advises checking directly with your airline because some carriers use their own forms or documentation requirements.

Do this before travelling rather than assuming that one airline’s policy will apply to another.

Are long flights different during pregnancy?

A long flight deserves a little more planning because sitting still for an extended period can increase the risk of deep vein thrombosis, known as DVT.

Pregnancy itself is associated with a higher risk of DVT than being non-pregnant, and prolonged immobility adds another risk factor. The NHS describes long-distance travel as a journey lasting more than four hours.

RCOG advises people taking medium or long-haul flights of more than four hours to take practical measures such as wearing loose clothing and comfortable shoes, taking regular walks around the aircraft, doing in-seat exercises regularly and drinking water at intervals.

The NHS also recommends moving around regularly during a long flight and drinking plenty of water.

Compression stockings may be appropriate for some travellers. RCOG advises that the correct size and type should be discussed with a midwife or doctor, particularly because individual DVT risk varies.

If you have additional risk factors for blood clots, ask your maternity team for personalised advice before flying. Do not start medication or other preventive treatment yourself.

When might flying not be advised?

Some pregnancy or health circumstances can make air travel less suitable.

RCOG says you may be advised not to fly if you have an increased risk of going into labour before your due date, severe anaemia, recent significant vaginal bleeding, certain serious heart or lung conditions, or sickle cell disease with a recent sickle crisis.

This is not a complete checklist for deciding whether you personally can fly. A clinician who knows your pregnancy and medical history can assess factors that a general travel guide cannot.

If you are uncertain, speak to your midwife or doctor before paying for non-refundable travel.

What should you organise before your flight?

A little practical preparation can make travel easier.

Check the medical facilities available at your destination, particularly if you are travelling somewhere remote. The NHS recommends taking your maternity medical records with you so healthcare professionals can access relevant information if you unexpectedly need care.

Travel insurance is also important. Check that the policy covers pregnancy-related medical care, premature birth and changes to your travel plans if pregnancy affects your return date.

If travelling abroad, look at current destination-specific health advice before booking. Some destinations may have health risks or vaccination considerations that need individual medical advice during pregnancy.

Your airline’s pregnancy policy, your travel insurer’s terms and the healthcare available at your destination are separate issues, so check all three.

What about airport security scanners?

Going through normal airport security screening is not considered a risk during pregnancy, according to RCOG.

If you have concerns about a particular screening process, you can ask airport security staff what type of equipment is being used and what alternatives, if any, are available.

How should you wear the seatbelt on the plane?

RCOG advises wearing the aircraft seatbelt reasonably tightly across the top of your thighs and underneath your bump.

Keep it fastened whenever the airline asks you to, and follow cabin crew instructions. If the standard belt does not fit comfortably, ask the cabin crew for a seatbelt extension rather than trying to position it differently yourself.

What if you feel unwell while travelling?

Pregnancy symptoms can make flying less comfortable for some people. RCOG notes that pregnancy sickness may feel worse if you experience motion sickness, while changes in air pressure can contribute to ear discomfort, particularly if you have nasal congestion.

Feeling uncomfortable does not necessarily mean something is wrong, but new or concerning symptoms should not be dismissed simply because you are travelling.

Know how to access medical care at your destination and keep your maternity team’s contact information available. If you become unwell during a flight, tell the cabin crew.

When to get professional advice

Speak to your midwife or doctor before flying if you have pregnancy complications, significant health conditions, a history of blood clots or other factors that may affect your individual risk. You should also ask for advice if you are unsure whether a long flight is appropriate for you.

Seek urgent medical advice if you develop possible symptoms of DVT, such as throbbing pain and swelling in one leg. The NHS advises requesting an urgent GP appointment or contacting NHS 111 if you think you may have DVT. If you are pregnant, you can also contact your maternity unit, or an early pregnancy unit where appropriate.

Symptoms such as sudden difficulty breathing or chest pain can require emergency assessment. Follow NHS emergency guidance and call 999 if you have severe breathing difficulty or another life-threatening emergency.

If you develop pregnancy-related symptoms before travelling, do not rely on an airline policy or general online advice to decide whether it is safe to fly. Contact your maternity unit, midwife, GP or NHS 111 as appropriate for advice based on your circumstances.