Norwegian Air Shuttle has become the European launch customer for the Boeing 737 MAX and also signed up to take Airbus A320NEOs, becoming another buyer of both reengined single-aisles.

Norwegian announced firm orders for 100 Boeing 737-8 MAX as well as 22 737-800s in a deal valued at $11.4 billion at list prices. Norwegian also took purchase rights for 100 more 737-8s.

Representing Boeing’s largest-ever order from a European airline, the deal also makes Oslo-based Norwegian the first carrier on the continent to finalize an order for the 737 MAX.

Boeing says the order “supports Norwegian’s plans to build on the success provided by its fleet of Next-Generation 737-800s for its rapidly expanding operations.”

The deal for Airbus is still at the commitment stage and covers 100 NEOs. Norwegian was not previously an Airbus customer. “The A320NEO will enable us to increase capacity while decreasing our operating costs,” airline CEO Bjorn Kjos says in a statement. The airline has purchase rights for 50 more NEOs.

The 737 MAXs will be powered by CFM International Leap-1Bs and the -800s by CFM56-7BEs. An engine selection for the NEOs between the Pratt & Whitney PW1100G and CFM International Leap-1A has yet to be made, but Norwegian is a significant CFM customer.

Norwegian is the third-largest low-cost airline in Europe, and currently operates more than 300 routes to destinations including North Africa and the Middle East.

The Boeing order follows Southwest Airlines’ $19 billion order in December for 208 737s of which 150 were for the more advanced, CFM Leap-1B powered MAX variant. Initial deliveries are set to begin in December 2017, although Boeing Commercial Airplanes president Jim Albaugh is challenging the company to bring forward development and deliveries.

To date, Boeing has orders and commitments for more than 1,000 of the 737 MAX from 15 customers, while the Next Generation 737 family has now accumulated orders for more than 6,300 aircraft.

The new aircraft from today’s order will join Norwegian’s current fleet of 62 aircraft, comprising 48 737-800s and 14 737-300s. Including today’s announcement, Norwegian has 184 unfilled orders for Boeing aircraft including 100 737 MAX airplanes, 78 737-800s and six 787s from Boeing and leasing companies.