travel sickness
US /ˈtræv.əl ˌsɪk.nəs/
UK /ˈtræv.əl ˌsɪk.nəs/

1.
a feeling of nausea and dizziness caused by the motion of a car, boat, or airplane
:
•
She always gets travel sickness on long bus journeys.
•
To prevent travel sickness, take medication an hour before your journey.