Flying during pregnancy is generally considered safe. However, it's best to consult your doctor before air travel, as certain pregnancy-related conditions, such as severe anemia, sickle cell disease, clotting disorders, and placental insufficiency, may pose issues when flying.
If your flight schedule is flexible, the best time to travel is during the second trimester (between 14 to 28 weeks of pregnancy). This period is when you feel your best, and the risk of miscarriage and preterm labor is lowest. Generally, you should avoid flying after 36 weeks of pregnancy.
Some pregnant women may worry about low cabin pressure and increased radiation levels during flights. Generally, these issues are not significant. While cabin pressure is lower, it only slightly reduces the oxygen levels in your blood, and your body adjusts accordingly. Increased radiation levels at high altitudes are also generally safe unless you fly frequently. If you are a flight attendant or frequent flyer, it may be best to adjust your work during pregnancy.