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Last Updated on November 17, 2025 by Ugurkan Demir
Long flights can be tough, making it hard to stay healthy. One big risk is getting blood clots on planes, like deep vein thrombosis (DVT). Over 300 million people face this risk every year.
At LivHospital, we know how important it is to prevent blood clots when flying. Sitting for too long, lower air pressure, and not drinking enough water can increase DVT risk. By taking simple steps, you can lower this risk and travel healthier.
We’re here to help you avoid blood clots on planes on long flights. Follow our tips to reduce your risk and travel safely.
It’s important to know about the risks and causes of blood clots on planes for safe travel. Blood clots, like Deep Vein Thrombosis (DVT), are a big worry for travelers, mainly on long flights. We’ll look at what causes blood clots on flights and who is most at risk.
Deep Vein Thrombosis (DVT) is when a blood clot forms in a deep vein, usually in the legs. This can be dangerous if the clot breaks loose and goes to the lungs, causing a pulmonary embolism. DVT is a big worry for travelers because flying can increase the risk, due to being seated for a long time and the lower air pressure.
Key Facts About DVT:
Flying conditions can lead to blood clots. Being seated for a long time, lower air pressure, and dehydration are key factors. When you’re seated for a long time, blood flow slows down, making clots more likely. Also, the dry air in planes can cause dehydration, making blood thicker and clotting riskier.
Some people are more likely to get blood clots on flights. These include people over 40, those who are obese, pregnant women, and those on hormone therapy. Also, those who have had surgery recently or have had blood clots before are at higher risk. Knowing these risk factors helps in taking steps to prevent blood clots.
| Risk Factor | Description |
| Age over 40 | Increased risk due to decreased mobility and possible health issues. |
| Obesity | Extra weight can put more pressure on veins, making clots more likely. |
| Pregnancy | Blood clotting factors and increased blood volume can raise DVT risk. |
| Hormone Therapy | Certain hormone therapies can make blood clotting more likely. |
Flying can lead to blood clots due to several factors. We will look at what makes this risk higher during long flights.
The air pressure in cabins affects blood flow. At high altitudes, blood vessels can expand. This might cause blood to pool in the legs.
Long periods of sitting increase the risk of blood clots. Slower blood flow makes clotting more likely.
| Risk Factor | Description | Prevention Strategy |
| Prolonged Immobility | Slowed blood flow due to extended periods of sitting | Regularly stand and walk, perform in-seat exercises |
| Cabin Pressure | Lower air pressure causing blood vessel expansion | Stay hydrated, avoid tight clothing |
| Dehydration | Thickened blood due to inadequate fluid intake | Drink plenty of water, avoid dehydrating beverages |
Dehydration also plays a big role in blood clot risk. When we lose too much water, our blood gets thicker and clots more easily.
Drinking lots of water before and during flights is key. Also, skip drinks that dry you out, like alcohol and caffeine.
Blood clots can form during or after flying. Knowing the symptoms can save your life. They can happen due to sitting for a long time, the air pressure in the cabin, and not drinking enough water. Spotting the signs early can greatly improve your treatment chances.
Signs of DVT include swelling, pain, redness, or warmth in the leg. The pain can be mild or very severe. It’s key to watch for these signs, mainly after a long flight.
Some symptoms need immediate medical help. Sudden shortness of breath, chest pain, or a fast heartbeat are urgent signs. These could mean a pulmonary embolism, a serious condition.
Don’t ignore these warning signs. Quick medical help can be life-saving.
Blood clots can form during the flight or up to a month later. Most happen in the first week. Being careful during this time is key for early detection and treatment.
Some people might not show symptoms until they’re back to their usual routine. Keeping informed and watching your health can make a big difference.
Staying active is key to avoiding blood clots on planes. Sitting for too long increases the risk of Deep Vein Thrombosis (DVT). Moving around can help lower this risk.
There are easy exercises you can do while sitting. Ankle circles and foot pumps help keep blood flowing. To do ankle circles, rotate your ankles in both directions.
For foot pumps, flex and extend your feet alternately. Knee lifts are also good; just lift your knees up and down.
Walking up and down the aisle is also important. We suggest getting up at least once an hour. This helps prevent blood clots and reduces stiffness.
“Regular movement during long flights can substantially reduce the risk of blood clots.”
Here’s a movement schedule for long flights:
Following this schedule can greatly reduce your risk of blood clots on long flights.
Staying hydrated is key, even more so when flying. It helps prevent blood clots. Drinking plenty of water before and during flights can thin your blood. This reduces clot risk. Make hydration a top priority for a safe flight.
The right water amount varies by age, sex, and health. But, aim for at least 8-10 glasses of water a day when flying. Start drinking more a day or two before your flight. This ensures you’re hydrated from the start.
Not all drinks are good for staying hydrated. Avoid caffeinated and alcoholic drinks as they can dehydrate you. Also, limit sugary drinks for better health.
Knowing dehydration signs is important. Look out for dry mouth, fatigue, dizziness, and dark urine. If you see these signs, drink more water. If they don’t go away, talk to a doctor.
Proper hydration can lower blood clot risk during flights. Drink lots of water and steer clear of dehydrating drinks. This ensures a safe and healthy trip.
Wearing compression stockings is a simple yet effective way to reduce the risk of blood clots during long flights. These stockings apply gentle pressure to the legs. This improves circulation and reduces the risk of Deep Vein Thrombosis (DVT).
Compression stockings are designed to apply graduated compression. They are tighter at the ankle and looser as they go up the leg. This helps push blood upwards towards the heart, improving circulation and reducing the risk of blood pooling in the legs.
When selecting compression stockings, it’s important to choose the right compression level and fit. Compression levels are measured in mmHg (millimeters of mercury). For DVT prevention during flights, a compression level of 15-20 mmHg is typically recommended.
To ensure a proper fit, measure the circumference of your ankle and calf. Then, refer to the manufacturer’s sizing chart.
For maximum effectiveness, put on your compression stockings before your flight. Ideally, a few hours before boarding to allow your legs to adjust to the compression. Continue to wear them during the flight and for a few hours after landing to help prevent post-flight swelling and clot formation.
Remove them periodically to check your skin for any signs of irritation or pressure damage.
By incorporating compression stockings into your travel routine, you can significantly reduce your risk of developing blood clots on planes. Always consult with a healthcare professional if you have specific concerns or questions about using compression stockings for DVT prevention.
Choosing the right seat and sitting properly can help prevent blood clots on planes. Where and how you sit can greatly affect your risk of Deep Vein Thrombosis (DVT) during flights.
Seats that allow more movement and better blood flow are best. Seats near the aisle are great because they make it easy to walk around. Walking helps improve blood flow and lowers clot risk.
| Seat Location | Circulation Benefits | Ease of Movement |
| Aisle Seat | High | Easy to get up and move around |
| Window Seat | Low | Difficult to get up without disturbing neighbors |
| Middle Seat | Moderate | Moderate ease of getting up |
Good sitting posture helps with better blood flow. Keep your legs uncrossed and feet flat. Avoid tight clothing that can restrict your legs or waist. Changing positions and short walks also help.
If your seat worries you, ask for a change. Do this at check-in or early in boarding. Tell the airline staff about your concerns to get help. Some airlines let you pick your seat for a fee, which is worth it for long trips.
By picking your seat carefully and sitting right, you can prevent blood clots on planes. A bit of planning and awareness can make your flight safer and healthier.
For those at higher risk of DVT, taking medication or supplements can help protect against blood clots on long flights. People at risk, like those with clot history or certain genetic conditions, should talk to their doctor about prevention.
Blood thinners help prevent blood clots. Doctors might suggest them for those at high DVT risk. It’s important to follow a doctor’s advice on these medications, as they can prevent clots but also increase bleeding risk.
Deciding on blood thinners depends on your health and clotting risk factors. They might be recommended for:
Some natural supplements might also lower blood clot risk. Omega-3 fatty acids, vitamin E, and curcumin have shown anticoagulant properties. But, use supplements with caution and under medical guidance.
| Supplement | Potential Benefit | Precautions |
| Omega-3 Fatty Acids | May reduce blood viscosity | Can interact with blood thinners |
| Vitamin E | Antioxidant properties | High doses may increase bleeding risk |
| Curcumin | Anti-inflammatory effects | May interact with certain medications |
Before using any medication or supplements for blood clot prevention, talk to your doctor. They can evaluate your risk, discuss benefits and risks, and give personalized advice.
When talking to your doctor, remember to discuss:
By working with your doctor, high-risk travelers can create a plan to reduce blood clot risk during flights.
Before and after flying, you can take steps to lower your risk of blood clots. These precautions can greatly improve your travel experience.
Before you fly, get your body ready for the long journey. Staying hydrated is key; drink lots of water before your flight. Also, regular physical activity boosts circulation and lowers blood clot risk.
Some activities can up your blood clot risk before flying. Try to avoid too much alcohol and eat less salty foods to stay hydrated. Also, wear loose clothes to keep your legs free and improve circulation.
After flying, watch how your body reacts. Elevate your legs and massage them gently to help circulation. If you notice swelling, pain, or redness in your legs, get medical help right away.
By following these steps before and after flying, you can lower your blood clot risk. Being proactive about your health ensures a safe and enjoyable trip.
Dressing right for long flights is our seventh tip to avoid blood clots. What you wear and pack can greatly affect your comfort and safety.
Wear loose, comfy clothes to help blood flow. Avoid tight clothes that can squeeze your legs and cut off blood flow. Choose clothes that let you move freely and don’t press on your skin.
Doctors say comfy clothes can lower the chance of blood flow issues on long flights. Loose-fitting clothes are comfy and also cut down DVT risk.
The shoes you pick for a long flight matter for blood flow. Avoid high heels and tight shoes that can block blood flow. Go for comfy, roomy shoes that let your feet breathe and move a bit.
“Wearing comfy shoes can really help how you feel during and after a long flight.”
Along with comfy clothes, there are key items to pack for DVT prevention. These include:
By packing these items and wearing comfy, loose clothes, you can lower your risk of blood clots on planes. Remember, prevention is key, and being ready is the first step to a safe and healthy flight.
Flying can worry those at risk of blood clots. But, by following 7 key tips, travelers can lower their risk of deep vein thrombosis on flights.
Staying active, drinking enough water, and wearing compression stockings help a lot. It’s also vital to know the signs of blood clots, like swelling, pain, or leg discoloration. This way, you can get medical help right away if needed.
If you have a blood clot in your leg and are flying, talk to a doctor first. Taking these steps and being aware of risks can make your flight safe and healthy.
By adding these easy tips to your travel plan, you can cut down blood clot risks. This way, you can enjoy your flight without worry.
Deep vein thrombosis (DVT) is when a blood clot forms in a deep vein, often in the legs. Flying can raise the risk of DVT. This is because you’re sitting for a long time, the air pressure changes, and you might get dehydrated.
To avoid blood clots on a plane, move around by doing exercises in your seat and walking the aisle. Drink plenty of water to stay hydrated. Wearing compression stockings can also help. Choose seats that are not too cramped.
Signs of deep vein thrombosis include swelling, pain, and redness in the legs. If you have sudden shortness of breath, chest pain, or a fast heartbeat, seek medical help right away.
Blood clots can form during or after flying. Symptoms might show up a few days or even weeks later.
Yes, compression stockings can prevent blood clots on planes. They apply gentle pressure to the legs, improving blood flow and reducing DVT risk.
Yes, anyone can get blood clots from flying, even if they’ve never had one before. This is because of the unique conditions on a plane, like sitting for a long time and lower air pressure.
Risk factors for blood clots on a plane include a history of clots, family history, being overweight, recent surgery or trauma, and sitting for a long time.
Drink at least 8-10 glasses of water on a long flight to stay hydrated and prevent blood clots.
Blood thinners might be suggested for those with clot history or other risks. Some natural supplements could also help. Always talk to your doctor before taking any medication or supplements.
It’s not usually safe to fly with a blood clot in your leg. It can lead to more serious problems. Always check with your doctor for advice.
