Boeing says its time for a new aircraft. The next new Boeing, known as the “new midsize airplane,” and unofficially, the 797, would likely be a double-aisle jet. The long process of design, building, testing, etc would mean the aircraft is not intended for delivery until around 2025.
The goal is to meet airlines’ needs for a plane bigger than the single-aisle 737, and smaller and with less range than the 787 Dreamliner. The new plane would overlap with the discontinued but still widely used 757 and 767, ferrying 200 to 280 passengers up to around 5,000 nautical miles.
The market for such a plane is questionable, which is one reason Boeing has not started developing it yet. The last 757 came off the line in 2004, and while airlines might like a replacement, it hasn’t been a major priority.
And Airbus has an aircraft in that space already. It can elongate the popular single-aisle A321. This would be at a lower cost and lower execution risk, since it wouldn’t be a completely new plane.