Is it safe to fly while pregnant?
Many airlines ask for a doctor’s letter after 28 weeks — and may refuse you after 36.
Medically reviewed by Dr. Christopher Sterling, obstetrician ·
The short answer
Flying is generally safe in a healthy pregnancy, but long flights raise the risk of blood clots, and airlines have their own cut-offs. Many ask for a letter after 28 weeks and don’t allow travel after 36 weeks (32 for twins).
Why it matters
Pregnancy makes blood clot more easily. Sitting still for more than 4 hours increases the risk of deep vein thrombosis.
Airline rules differ — check before you book, and check your travel insurance covers pregnancy.
Some destinations carry infection risks, such as Zika virus, that matter in pregnancy.
What to do
- Check the airline’s pregnancy policy and get a letter if needed.
- On long flights: drink water, walk the aisle, do calf exercises, and ask about compression stockings.
- Check travel advice for Zika and other infections at your destination.
- Carry your pregnancy notes when travelling.
Common questions
Do airport scanners harm the baby?
No. Airport body scanners are considered safe in pregnancy.
Sources
Medically reviewed by Dr. Christopher Sterling, obstetrician, on against the sources above. Guidance can differ between countries — always follow the advice of your own midwife, doctor or pharmacist. Medical disclaimer.
You might not know these either
Can you change cat litter while pregnant?
You can keep your cat — just hand over the litter tray.
Read the answer →
Is gardening safe during pregnancy?
Garden soil can carry the same parasite as cat litter.
Read the answer →
When should you start taking folic acid?
The baby’s spine starts forming before most women even know they’re pregnant.
Read the answer →Get all 42 in one guide
We’re turning every tip into one beautifully organised guide — with trimester-by-trimester checklists and a printable fridge list of foods to avoid. Join the early-access list and we’ll let you know when it’s ready.