After the partnership took effect on 1 July 2018, the main stakeholder Airbus assisted in marketing and servicing of the aircraft. On 10 July 2018, hours after the CSeries programme was renamed A220, JetBlue ordered 60 A220-300s (former CS300) to replace its 60 Embraer 190s from 2020 with 40% lower fuel burn per seat, a blow to Embraer which was marketing the E195-E2 to the carrier. Priced at $5.4 billion before customary discounts, they should be delivered from Mobile, Alabama, some could be converted to the A220-100 (former CS100) and 60 options are pending from 2025. JetBlue found the two models very close economically, as the A220-300 fuel seat cost is 40% lower than its current E190 and operating cost per seat excluding fuel are 22% lower.