Ryanair continues to have “utmost confidence” in Boeing 737 MAX, but is postponing the delivery of its first five MAXs at least until the winter of 2019, based on the condition that the U.S. manufacturer manages to gain back EASA’s trust by the time.

The Irish low-cost giant has a firm order of 135 Boeing 737 MAX 8s, with options for 75 more. Initially, Ryanair was supposed to begin receiving the aircraft in spring 2019.

The airline still praises MAX for its cost efficiency. Besides 16% lower fuel consumption and 40% lower noise emissions, Ryanair also plans to benefit from fitting more seats on the new aircraft. The airline currently operates a fleet of 737-800s that fit 189 passengers but plans to have 197 seats, or 4% more, on the new MAXs.

However, because of the grounding and delayed delivery date, the closest time “any meaningful cost benefits” will appear in its finance books is in 2021.

Ryanair is a faithful Boeing operator,  currently flying a fleet of 431 Boeing 737-800s. Other airlines in the group, namely Ryanair Sun (now Buzz) and Ryanair UK also operate 737-800s-only, with the only exception being Lauda Motion, an all-Airbus operator.