Delta Air Lines (DL, Atlanta Hartsfield Jackson) has announced it has revised its A220 backlog with fifty A220-300s having now been ordered.

Under its 2016 order with Bombardier, the US carrier had originally committed to seventy-five A220-100s with options for fifty more. However, in a statement issued on January 9, 2018, Delta said that in addition to firming up 15 options, it had now converted fifty of the jets to A220-300s with the remaining forty to be A220-100s.

The first A220-300 will arrive in 2020 and will be configured with a total of 130 seats.

“These additional A220 aircraft will continue to strategically enable Delta to refresh our fleet, drive further advances in the customer experience and serve as an excellent investment for our customers, employees and shareowners for Delta into the next decade,” Gil West, Delta’s Chief Operating Officer, said. “We look forward to taking our first A220-300 in 2020 at the Airbus assembly facility in Mobile, Alabama.”

Thus far, the carrier has taken delivery of four A220-100s ahead of their commercial debut later this month. Overall, Delta expects its entire A220 order to be fulfilled by the end of 2023.