Finding a replacement for the 757 and 767 is a top priority for Delta Air Lines. The Atlanta-based giant has a combined fleet of 204 examples with an average age of 22.4 years.

The 787 has an impressive order book, but many airlines view the jet as being too large for their needs.

More than 1,000 757s were produced between 1981 and 2004. Despite this, Boeing has yet to launch a suitable successor for the ageing type.

The Boeing 757 remains popular with several European leisure airlines. TUI Airways uses eight examples on connections from Manchester, Birmingham and London/Gatwick.

Arkia Israeli Airlines accepted A321-251NX 4X-AGH (msn 8517), the first A321LR, on November 14, 2018, but this new long-range subvariant might be followed by further A321neo development.

United Airlines placed a firm order for 50 Airbus A321XLRs on December 4, 2019, leading many to doubt the future viability of Boeing's proposed New Midsize Airplane (NMA).

Airbus states the A321XLR will offer “30% lower fuel burn per seat than previous-generation competitor aircraft." JetBlue has chosen the airliner to begin transatlantic services.
The airline has converted 26 of its 85 Airbus A321neo orders to take advantage of the increased ranges offered by the A321LR and XLR variants.