Meaning of flight bubble | Babel Free
Definitions
An arrangement between two countries, states, or other administrative regions, that allows free air travel of residents between them while otherwise keeping their borders closed to travellers from outside the bubble.
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.