Do COVID-19 vaccines trigger blood clots when flying?
There is no known link between blood clots that develop as a result of air travel and COVID-19 vaccines. The blood clots that develop from flying on planes are “totally different” from the rare blood clots reported by a small number of people after receiving certain COVID-19 vaccines, according to Dr. Elliott R. Haut, a deep vein thrombosis expert at Johns Hopkins University School of Medicine.
Such rare clots have been reported in a small number of people who received Johnson & Johnson and AstraZeneca shots. Those clots form in the veins of the brain or blood vessels in the abdomen, and some scientists suspect they are due to an uncommon immune response.
Clots that develop on flights typically form in the leg, and are often the result of people being cramped, not moving around, or pressurization.