Qantas ceo Alan Joyce says the airline group's two-brand approach, with full-service Qantas and low-cost offshoot Jetstar, gives the company a unique advantage over other carriers.

"I'm a firm believer that the middle of the road strategy is not a great strategy," Joyce said at the Australia Pacific Aviation Outlook Summit.

"You could end up as roadkill if you sit in the middle of the road for too long.

"I think it is important for you to define and focus on what your customers are after and what you are trying to deliver to them, and I think with Jetstar and Qantas we do that."

His comments were made a day after Virgin Blue's group executive commercial Liz Savage said the airline wanted to double its 10 per cent share of the corporate travel market over the next year.

Savage had said the middle ground was "a great place to be" because that was where the majority of customers were.

She said Virgin was chasing a share of the lucrative business market while also retaining its grip on the leisure market.