No way would I arrive so late to the airport on one of the busiest travel days of the year. The place will be a zoo. A 10:50 flight will probably start boarding around 10:15, so if there is a back up at security (very likely), or you have trouble finding a parking space, etc., you'll risk missing your flight. Add in the chances of weather delays that time of year and you could have problems. I usually don't like arriving too early, but in this case, I'd be at the airport a bit earlier, say 8:30.