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Hi there,This is Dr Basu, experienced Internal Medicine Specialist.I am here to address your concerns and provide great service.
There is no contraindication to air travel with such aneurysm.
The cabin pressure difference should not increase risk of aneurysm rupture.
The risk of rupture is considered low below 5 cm diameter.
So you are safe to fly.Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star).Please bookmark my profile for fast, reliable authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/