The safest time to travel during pregnancy is the second trimester, roughly months four through six (weeks 14 to 28). During this window, the highest risk of miscarriage has passed, morning sickness has typically faded, and you still have weeks before the complications of late pregnancy become a concern. Energy levels tend to peak, and you’re mobile enough to sit comfortably for long stretches.
That said, travel isn’t off-limits during the rest of pregnancy. The timing just requires more thought depending on how you’re feeling, where you’re going, and how you plan to get there.
Why the Second Trimester Is the Sweet Spot
The second trimester hits a biological middle ground. The risk of miscarriage drops significantly after the first 12 weeks. At the same time, you’re far enough from your due date that the chance of preterm labor (labor before 37 weeks) remains low. The March of Dimes notes that during the second trimester, you’re less likely to experience a pregnancy emergency such as miscarriage or preterm labor compared to either end of pregnancy.
Practically speaking, most of the symptoms that make early pregnancy miserable, like nausea, fatigue, and food aversions, have eased by week 14 for many women. And you’re not yet dealing with the swelling, back pain, and breathlessness that can make the third trimester physically draining. If you have a trip to plan and flexibility on timing, aiming for somewhere between weeks 16 and 26 gives you the widest comfort margin.
First Trimester: Not Dangerous, but Uncomfortable
Traveling in the first three months isn’t medically prohibited for most healthy pregnancies. The concern is more about comfort and unpredictability. Nausea can strike without warning, fatigue can be overwhelming, and the frequent need to urinate makes long stretches in a car or plane harder to manage. Some women also feel anxious about traveling before they’ve had their first ultrasound or genetic screening.
There’s no strong evidence that air travel itself causes miscarriage. Research published in the journal Hippokratia describes the association between flying and miscarriage as “contradictory,” meaning studies haven’t been able to confirm a link. However, women at higher risk of miscarriage may be advised to limit flying during this period. If you have a history of pregnancy loss, it’s worth discussing travel plans with your provider before booking anything.
Third Trimester: Higher Stakes, More Restrictions
Travel becomes more complicated after about 28 weeks, and not just because of physical discomfort. The risk of preterm labor rises, and if your water breaks or contractions start while you’re far from home, you could end up delivering at an unfamiliar hospital without your medical records or chosen provider.
Warning signs to watch for on any trip in late pregnancy include belly pain or cramps, contractions, severe headaches, leg swelling or pain, vaginal bleeding, vision changes, or fluid leaking from the vagina. Any of these warrant immediate medical attention, wherever you are.
Airlines generally allow domestic travel up to 36 weeks. For international flights, the cutoff is earlier, often between 28 and 35 weeks depending on the carrier. Some airlines require a doctor’s note after a certain point. If you’re planning to fly in your third trimester, check your airline’s specific policy well before your departure date.
Conditions That Make Travel Unsafe at Any Stage
Certain pregnancy complications rule out travel regardless of what month you’re in. The CDC lists the following as absolute contraindications:
- Cervical insufficiency (a weakened cervix that may open too early)
- Placental abruption (the placenta separating from the uterine wall)
- Preeclampsia, either current or in a previous pregnancy
- Preterm labor or premature rupture of membranes
- Vaginal bleeding
- Suspected or confirmed ectopic pregnancy
Conditions that may make travel risky but aren’t automatic disqualifiers include carrying multiples, placenta previa, fetal growth restriction, and a history of miscarriage or ectopic pregnancy. These fall into a gray area where your provider’s guidance matters most.
Flying Safely While Pregnant
Pregnancy creates a state where your blood clots more easily than usual, increasing the risk of deep vein thrombosis (DVT), a blood clot in the leg. This risk is already 5 to 10 times higher during pregnancy compared to when you’re not pregnant. Add several hours of sitting still in a pressurized, low-humidity cabin, and medium- to long-haul travelers face a 2- to 4-fold additional increase in clot risk.
To reduce that risk on flights longer than two hours:
- Walk the aisle every hour or two
- Do calf exercises while seated: flex and point your feet, rotate your ankles
- Wear compression stockings, which help push blood back toward your heart
- Stay hydrated with water, since cabin air is dry and dehydration worsens clotting risk
- Book an aisle seat so you can get up without climbing over other passengers
Cruise Ships Have Earlier Cutoffs
If you’re considering a cruise, be aware that most cruise lines set their pregnancy cutoff much earlier than airlines do. Carnival Cruise Line, for example, will not allow you to board if you’ll be 24 weeks pregnant or more at any point during the sailing. Attempting to board past that point can result in being turned away without a refund. Other major cruise lines have similar policies, typically in the 24- to 28-week range. Check your cruise line’s specific rules before booking, and carry documentation of your due date.
Road Trip Precautions
Car travel is often the most flexible option because you control the stops. The key is taking breaks every one to two hours to walk around and stretch your legs, both for comfort and to reduce clot risk. Long stretches of sitting in one position can cause swelling and stiffness, especially in the third trimester.
Seatbelt placement matters more than many people realize. The National Highway Traffic Safety Administration recommends placing the lap belt below your belly, snug across your hips and pelvic bone. Never place it over or on top of your bump. The shoulder belt should cross your chest between your breasts and sit away from your neck, never tucked under your arm or behind your back. Remove any slack. In a collision, a properly positioned belt protects both you and the baby. An improperly positioned one can cause injury to the uterus.
Destinations to Avoid During Pregnancy
Where you travel matters as much as when. The CDC advises pregnant women not to travel to areas with Zika virus risk, as Zika can cause severe birth defects including microcephaly. Pregnant travelers should also avoid regions with active malaria transmission. Malaria is more severe during pregnancy and increases the risk of premature birth, miscarriage, and stillbirth.
Some travel destinations also require vaccinations that use live viruses, which are generally not given during pregnancy. Before booking international travel, check the CDC’s destination-specific recommendations to make sure you won’t need a vaccine that isn’t safe to receive while pregnant. Planning this early, ideally before conception or in the first trimester, gives you time to adjust your itinerary if needed.