Rumours being spread on social media purport that some airlines are considering prohibiting vaccinated passengers from flying, allegedly due to increased risk of blood clotting. This false claim was repeated in Russian, Swiss, Spanish, and Australian sources. However, there is no evidence of any airlines considering this ban and there are no known links between Deep Vein Thrombosis (which can occur on long flights) and COVID-19 vaccines. Fullfacthas fact-checked this rumour.