Delta's most popular Boeing 757-300 route is ATL to SAN ... which operates three daily flights using a mix of Boeing 737-900s and 737 MAX 9s. The route is also advertised and sold by codeshare ...
Although the 757-200 was launched with Rolls-Royce engines ... The other US carrier operating the route is United with the 737 MAX 9. Delta also goes up against avianca and Volaris between ...