Boeing and Enter Air have announced on Friday an order for two 737 MAX 8s and two Next-Generation 737-800s. The order, worth more than $400 million at current list prices and previously attributed to an unidentified customer, is the first direct order for Boeing from the Polish charter carrier.

“The 737 has been the cornerstone of our dynamic growth and the addition of the 737 MAX to our fleet represents an exciting new chapter in Enter Air’s successful history,” Grzegorz Polaniecki, CEO of Enter Air said in a press release. “With this latest acquisition we will be able to boost our expansion across the European holiday market, offering our clients competitive pricing with exceptional comfort.”

The 737 MAX incorporates the latest technology CFM International LEAP-1B engines, Advanced Technology winglets and other improvements to deliver the highest efficiency, reliability and passenger comfort in the single-aisle market. The 737 MAX has accumulated more than 2,800 orders to date from 58 customers.

“In less than five years Enter Air has grown to be a major player in the Central and Eastern European holiday market, successfully utilizing the excellent reliability and economic performance of the 737,” said Todd Nelp, vice president of European Sales, Boeing Commercial Airplanes. “Today’s announcement to add 737 MAXs and additional Next-Generation 737-800s to its fleet will enable the carrier to position itself for continued success well into the future.”

Today’s announcement is part of Enter Air’s fleet expansion as the airline continues to grow following its first commercial flight in 2010. Today, the Warsaw based carrier serves more than 70 holiday destinations across the Mediterranean, Africa, the Middle East and Asia with an all-Boeing fleet of 17 Classic and Next-Generation 737s.