Most airlines allow you to fly domestically until about 36 weeks of pregnancy. Your ob-gyn can provide proof of your due date if you need it. If you are planning an international flight, the cut-off for traveling may be earlier.
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The best time to travel during pregnancy is the second trimester (between 14 and 28 weeks) and early in the third trimester.
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.
During a healthy pregnancy, occasional air travel is almost always safe. Most airlines allow you to fly domestically until about 36 weeks of pregnancy. Your ob-gyn can provide proof of your due date if you need it.
During the third trimester (25 to 40 weeks), many healthcare providers and midwives advise staying within a 300-mile radius of home because of potential problems such as high blood pressure, phlebitis, and false or preterm labor.
Pregnant travellers can normally travel safely by air. In the absence of medical or obstetrical complications, pregnant women can safely fly up to 36 weeks gestation. Most airlines restrict travel in late pregnancy or may require a written confirmation from a physician.
DVT can lead to a dangerous condition called pulmonary embolism. This is when a blood clot travels to the lungs. Research shows that any type of travel lasting 4 hours or more—whether by car, train, bus, or plane—doubles the risk of DVT. Being pregnant is an extra risk factor for DVT.
Examples include a history of miscarriage or vaginal bleeding, severe anemia, and high blood pressure or diabetes that's not well controlled. If you had preeclampsia during a previous pregnancy — a condition that causes high blood pressure and extra protein in urine — flying may not be advised.
Another reason the aisle seat is superior for pregnant travelers is that it's crucial to get up and walk around. Blood clots are a risk for all air travelers, but that risk increases with pregnant travelers. Walking around can help the blood flow and lessen the chances of a blood clot while flying.
Flying while pregnantMost airlines won't let you fly if you're within about a month of your due date. Some will need a letter from your GP or midwife saying you're fit to fly when you're 7 months pregnant. Check with the airline before you book.
After week 28 of pregnancy, the airline may ask for a letter from your doctor or midwife confirming your due date, and that you are not at risk of complications.