Air Travel During Pregnancy

Flying during pregnancy is generally safe for most women, and most airlines allow it up to a specific point, but there’s a mix of airline policy and general health advice worth knowing before booking.

When it’s generally fine

Most healthcare providers consider the second trimester (roughly weeks 14–27) the most comfortable and lowest-risk window for air travel, once early pregnancy nausea has typically settled and before the later-pregnancy discomfort and practical restrictions set in. Flying earlier or later than this isn’t automatically unsafe — it’s simply less commonly recommended as the ideal window, largely for comfort reasons and, in later pregnancy, airline policy.

Airline restrictions

Airlines have their own policies, which vary and are separate from medical advice — you need to check with the specific airline you’re flying with, but as a general pattern:

• Most airlines allow flying without restriction up to around 28 weeks.
• Between roughly 28 and 36 weeks, many airlines require a letter from a midwife or GP confirming your due date and that the pregnancy is uncomplicated.
• Most airlines don’t permit flying at all after around 36–37 weeks for a single pregnancy (often earlier, around 32 weeks, for twins or a multiple pregnancy), due to the risk of going into labour during the flight.

Check your specific airline’s policy directly, and carry any required documentation with you, as it may be checked at check-in.

Blood clot (DVT) risk

Sitting still for extended periods on any long journey — flights, but also long car or train journeys — increases the risk of deep vein thrombosis (DVT), a blood clot usually in the leg, and pregnancy itself already increases this risk somewhat due to changes in blood clotting. This isn’t a reason to avoid flying, but it’s worth taking sensible precautions on longer flights:

• Walk around the cabin periodically, roughly every hour if possible.
• Do simple seated ankle and calf exercises regularly during the flight.
• Stay well hydrated and avoid excessive caffeine or alcohol.
• Wear loose, comfortable clothing.
• Compression stockings, available over the counter, are worth considering for longer flights and are sometimes specifically recommended if you have additional risk factors — ask your midwife or GP if you’re unsure whether these apply to you.

Security scanners

Airport security scanners (both metal detectors and full-body scanners) are considered safe during pregnancy — the radiation dose involved is extremely low and not a significant concern. If you would prefer a physical pat-down instead, you can request one.

Destination considerations

Beyond the flight itself, think about your destination: check whether travel vaccinations needed for the destination are safe in pregnancy (some live vaccines are avoided — discuss with a travel health service or GP well in advance of booking), whether malaria risk is a concern in the region (some antimalarial medications are not recommended in pregnancy), and whether you’ll have reasonable access to medical care if needed. Travel insurance that specifically covers pregnancy-related care is worth checking for, since standard policies don’t always include this by default.

When to check with a doctor before flying

If you have a higher-risk pregnancy — including a history of pregnancy complications, multiple pregnancy, or a condition like pre-eclampsia — check with your midwife or doctor before booking a flight, since individual circumstances can change what’s advisable regardless of general airline policy.