[erlayman]

DVT is going to reach the heart and lungs, not the brain.

[Jamestown1630]

'In rare instances, a clot can travel from the venous system to the arterial system and then to the brain, causing an ischemic stroke. This typically occurs if an individual has a patent foramen ovale (PFO), a small opening between the upper chambers of the heart. The DVT-PE-stroke pathway represents the most relevant mechanism linking air travel to increased stroke risk.'

https://biologyinsights.com/can-flying-cause-a-stroke-a-look-at-the-medical-risks/