How long after flying can a blood clot form?

Anything out of the ordinary within a week or two after a long flight—leg pain, achiness, heaviness in your leg, swelling—could be a blood clot.



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The following are the most common symptoms of DVT that occur in the affected part of the body (usually the leg or arm): Swelling of your leg or arm. Pain or tenderness that you can't explain. Skin that is warm to the touch.

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Prevent Blood Clots During Travel
  1. Stand up or walk occasionally. ...
  2. Exercise your calf muscles and stretch your legs while you're sitting. ...
  3. Talk to your doctor about wearing compression stockings or taking medicine before departure if you have additional risk factors for blood clots.


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Talk to your doctor about wearing compression stockings or taking medicine before departure if you have additional risk factors for blood clots. Taking aspirin to prevent blood clots when traveling is not recommended.

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Even if you travel a long distance, the risk of developing a blood clot is generally very small. Your level of risk depends on the duration of travel as well as whether you have any other risks for blood clots.

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Summary. Pilots should be aware of the potential increased risk of DVT associated with air travel. Several easy to follow guidelines should minimize any increased risk.

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Compression socks prevent swelling
Being able to stand up and walk around or stretching is limited on a plane; therefore, promoting blood circulation is necessary. “Compression socks help to increase circulation, thus preventing swelling in your lower legs and feet,” he explains.

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