Jetstar has unveiled its biggest expansion ever of its New Zealand and Trans-Tasman network. 

It's adding new routes from Brisbane to Queenstown and Hamilton to Christchurch, and increasing capacity on five domestic and trans-tasman routes - creating a total of more than 660,000 extra seats a year.

Tourism Minister Louise Upston says this is proof more airlines have confidence in what New Zealand can offer. 

"What it says is that Jetstar and Qantas have real confidence in the market in New Zealand - and they're really confident about the direction the Government's taking in our absolute, unabashed ambition for more visitors."

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