Question

a charter flight is less expensive than a ... помогите найти ответ

Answer 1

a charter flight is less expensive than a other flights because it is performed for a specific customer-чартерные рейсы дешевле, чем другие рейсы, поскольку она осуществляется под конкретного заказчика

Answer 2

a charter flight is less expensive than a  regular flight.