Agreed. The 757-200 isn't much larger than a 737-900ER. The 757 has better payload/range and a higher cruising speed. The downside of the 757 is that it has a h

Agreed. The 757-200 isn't much larger than a 737-900ER. The 757 has better payload/range and a higher cruising speed. The downside of the 757 is that it has a heavier empty weight, and uses significantly more fuel. For routes that have thin margins and relatively low passenger loads, the 737 makes a lot of sense. For similar reasons, the Embraer 175 is popular with regional airlines. The CS100 [0] would compete for orders with the newer Embraer E2 [1] series. [0] https://en.wikipedia.org/wiki/Bombardier_CSeries https://en.wikipedia.org/wiki/Bombardier_CSeries [1] https://en.wikipedia.org/wiki/Embraer_E-Jet_E2_family https://en.wikipedia.org/wiki/Embraer_E-Jet_E2_family