airsickness       
noun [ U ] uk/ˈeə.sɪk.nəs/ us/ˈer.sɪk.nəs/
 晕机
the feeling that you will vomit when flying on an aircraft
  Although he suffered from airsickness he served as a pilot for five years. 尽管他患有晕机病,但他还是担任了五年的飞行员。 
 How can we prepare for such a long flight and prevent airsickness? 我们如何为如此长的飞行做好准备并防止晕机? 
 See: airsick
 - More examples
 - He continued taking flying lessons despite having airsickness at first.
 - It was pointed out that I would be less prone to airsickness in a larger aircraft.
 - While he was on the road, the author jotted down notes on popcorn boxes, hotel stationery, and airsickness bags.