FARNBOROUGH, England, July 21 (Reuters) - Airbus said on Thursday LATAM Airlines had ordered an additional 17 A321neo planes to take its total order book for the model to 100.

The order came in the week of the Farnborough Airshow in Britain, but was not announced at the event.

Airbus said LATAM had also endorsed the A321XLR model, by confirming it would bring the aircraft into its fleet to complement its long-haul offerings. (Reporting by Mark Potter)