The Abu Dhabi-based airline valued the deal at $423 million based on list prices, though carriers typically negotiate discounts.

Etihad already has two of the cargo planes, which it began operating in 2010. It uses them on routes to Asia, Africa, Europe and the Middle East.

Etihad is fully owned by the government of Abu Dhabi.

It has said it expects to break even for the first time in 2011, though it has yet to release its financial results.