Marlborough Airport (BHE), which is also known as Blenheim Airport or Woodbourne Airport, is on State Highway 6 near Renwick. The airport handles Air New Zealand flights to Auckland and Wellington, Air2there flights to Paraparaumu and Sounds Air flights to Christchurch, Kaikoura, Paraparaumu and Wellington.
The Air New Zealand and Sounds Air service to and from Wellington is a good alternative to the ferry.