Answer: For each flight, you get 2.3 cigarettes worth of radioactivity. You would need to fly 4572 East-West coast flights per year to reach same dose as from

Answer: For each flight, you get 2.3 cigarettes worth of radioactivity. You would need to fly 4572 East-West coast flights per year to reach same dose as from smoking 1.5 packs of cigarettes per day. --- Data points: Smoking 1.5 packs of cigarettes per day is equivalent to between 60 and 160 milliSievert per year http://mathscinotes.com/2014/01/radiation-exposure-from-cigarette-smoking/ http://mathscinotes.com/2014/01/radiation-exposure-from-ciga... With 20 cigarettes this means 10958 cigarettes. At about 160 milliSievert, we get 0,014601205 milliSivert per cigarette. You would be exposed to about 0.035 mSv (3.5 mrem) of cosmic radiation if you were to fly within the United States from the east coast to the west coast. https://www.cdc.gov/nceh/radiation/air_travel.html https://www.cdc.gov/nceh/radiation/air_travel.html