In its pre-close trading update the carrier, which is based in Hungary, said it had traded well in the first-half of its financial year and now expects net profit to be between €190-200 million, up from €175-185 million.
However, Wizz Air did say that the downward trend in unit revenues is likely to continue in the second half of the year.
József Váradi, chief executive, said: "We are very pleased with summer trading and anticipate that this will translate into another record quarter for Wizz Air.
"We have continued to grow our network and increase our passenger numbers throughout the period while maintaining an industry leading, ultra-low cost base.
"We are also very excited about the arrival of the A321s from November this year. These aircraft will underpin our growth plans for the next decade and further improve our cost competitiveness."
Wizz Air expects to grow capacity by 18% in the financial year (up from 17%).