The A320 has been selected by 222 operators (Dec. 2008), among these several low-cost operators, gaining ground against the previously well established 737 in this sector; it has also been selected as a replacement for 727s and aging 737s by many full-service airlines such as Star Alliance members United Airlines, Air Canada, and Lufthansa. After dominating the very large aircraft market for four decades, the Boeing 747 faced a challenge from the A380. In response, Boeing offered the stretched and updated 747-8, with greater capacity, fuel efficiency, and range. Frequent delays to the Airbus A380 program caused several customers to consider cancelling their orders in favour of the refreshed 747-8. In February 2019 Airbus announced the end of the A380 production after the remaining orders would be delivered. By June 2019, 154 Boeing 747-8 were ordered and 134 delivered, while 290 Airbus A380 were ordered and 238 delivered.