Permission has been given for 11 night flights a week to operate from Kent International Airport this summer.
EUjet has created 400 jobs, the council says
Campaigners had claimed 80% of people living near Manston airport opposed the plans by budget airline EUjet because of the noise that would be created.
On Thursday, Thanet councillors agreed to the flights and denied it had broken an agreement not to allow night flying.
It said EUjet was told it could only operate the flights under certain conditions during a six-month period.
Thanet District Council deputy leader Bob Bayford said it was agreed a night flying policy be set up and the original agreement had provision for that.
He said: "We are responding to a request from a fledgling operation that is actually providing over 400 jobs in the area and we believe that is absolutely to be supported.
"The agreement last night had very specific recommendations.
"We are talking about 11 flights per week and many of those are very close to the 2300 GMT limit."
"The vast majority of people in Thanet are supportive of the airport and a lot of people are very happy with the EUjet operation."
Pete Binding, from the Manston Airport Group, had said residents wanted jobs created at the airport but wanted flights to be kept to the daytime.
He claimed a recent survey had found that 80% of people opposed night flights and were concerned about noise.