The 737-900ER’s deployment will be similar ... Both versions have 20 seats in first class, 29 Delta Comfort+ seats, and 150 main cabin seats.
The FAA has begun an investigation into a midair incident involving a United Airlines Boeing 737-900ER and a Delta Air Lines ...
The 737-900ER is not part of the newer Max fleet but has the same optional door plug design that allows for the addition of an extra emergency exit door when carriers opt to install more seats.