According to this chart, it's approximately correct? https://xkcd.com/radiation/ https://xkcd.com/radiation/ Background radiation is 10msv per day, so 3650 in

According to this chart, it's approximately correct? https://xkcd.com/radiation/ https://xkcd.com/radiation/ Background radiation is 10msv per day, so 3650 in a year. A cross country flight (6hrs according to google flights) is 40msv, so 1% of yearly background exposure. However I did mention a "short" flight, so if you scale it down for a 2 hr flight, you get 0.3%, which is admittedly higher than 0.1%, but not too far off.