Taking a "low-dose" or "baby" aspirin before a long-haul flight is a common practice used to help prevent Deep Vein Thrombosis (DVT), as aspirin acts as a mild blood thinner that can inhibit platelet aggregation. For individuals at high risk—such as those with a history of blood clots, recent surgery, or certain genetic factors—doctors may recommend it as a preventative measure. However, for a healthy person with no underlying risks, taking aspirin solely for a flight is generally not necessary and can carry its own side effects, such as gastrointestinal irritation or increased bleeding risk. In 2026, medical professionals emphasize that "physical" prevention is often more effective than "chemical" prevention for the average traveler. This includes wearing compression socks, staying well-hydrated to prevent blood thickening, and getting up to walk every 1-2 hours. If you are considering aspirin for a flight, you should consult your physician to determine if the benefits outweigh the risks for your specific medical profile, especially for flights exceeding eight hours.