LE BOURGET, France—Wizz Air is slowly emerging as one of the largest players in the intra-European airline market, as underlined by a huge order for Airbus A321neos.

The Hungarian LCC signed an agreement on June 18 for 110 Airbus A321neos and secured purchase rights for an additional 90 aircraft of the same type. “This is the largest transaction we have ever done,” Wizz Air CEO Jozsef Varadi said at the Paris air show. He, in jest, added that “I don’t like these air shows. Whenever I go to them I buy something.”

Wizz Air currently operates a fleet of 61 A320s following an ultra-low-cost model that positions the airline below Ryanair service standards. The carrier has another 27 A320ceos and 27 A321ceos on firm order that are to be delivered until the end of 2018. The A321neos are expected to arrive in 2019-24. The 167 aircraft arriving over the next nine years will partially be used to replace the existing fleet, but will also allow for significant growth.

The airline is becoming the only LCC worldwide to focus its business model on the largest narrowbody. Others, including Ryanair, are operating the medium-sized versions—such as Boeing 737-800s—and Easyjet still operates significantly more A319s than A320s, although that is changing in light of outstanding orders for another 57 A320s and 100 A320neos. Easyjet has no A321s on order. “We are convinced the A321neo is the superior product in terms of economic efficiency,” Varadi said. “It will deliver the lowest unit costs in the narrowbody market and allow us to grow the business at a higher pace.”

Wizz Air plans to operate the A321neo in a 239-seat layout, just short of the 240-passenger limit set by the European Aviation Safety Agency (EASA) for the aircraft. Despite operating close to maximum passenger capacity, Varadi indicated that the airline likely will not opt for the larger movable bins that Airbus is offering as an option to increase carry-on volume: “We are less excited about other changes in the cabin,” he said.

Varadi is also exploring making its A320 fleet’s cabins more dense. The aircraft are currently equipped with 180 seats, but studies are ongoing into an increase to 186-seat, 188-seat, or 189-seat versions. Airbus has only recently received approval for the 189-seat configuration.