Generally, women are not allowed to travel by air after 36 weeks for domestic travel, and after 28 to 35 weeks for international travel. The decision on whether to travel and how far to travel at any time during pregnancy should be a joint decision between you and your healthcare provider or midwife.

Most airlines have a "cutoff" for travel during pregnancy, generally occurring at the start of the 9th month (36 weeks) for single pregnancies and earlier (often 32 weeks) for multiple pregnancies like twins. For domestic flights, many U.S. carriers allow travel up until the end of the 36th week, provided there are no complications. For international travel, the rules are stricter; many international airlines require a "Fit to Fly" certificate from a doctor for any travel after 28 weeks. By the time you reach 37 weeks, almost all airlines will prohibit you from boarding to avoid the risk of an in-flight delivery. This is not just for the mother’s comfort; it is a safety measure because aircraft are not equipped for neonatal emergencies. In 2026, if you must travel late in your pregnancy, it is vital to carry a medical letter stating your due date and confirmation of a low-risk pregnancy. Always check the specific carrier's "Expectant Mothers" policy before booking, as some budget airlines have even stricter limits starting as early as the 34th week to minimize liability.