Increased demand for online shopping has helped Qantas add a Boeing 737 freighter to its fleet and to set aside six of its domestic freighters for the exclusive use of its biggest client, Australia Post.

From July, six of the 14 freighters in the Qantas fleet will feature StarTrack-branded livery. The deal is part of a five-year, $500 million-plus contract signed last year which is the biggest air freight contract in the Australian domestic market.