This is directly from a post by 80ktsClamp on https://www.airlinepilotforums.com/d...lta-19580.html

NYC crew can start or end a trip at any of the three major NYC airports: JFK, LGA or EWR

Delta's 7ER category covers 767-300ER, 757-200 and 757-300.

Note the designation of C-Series (A220) bases at NYC and SLC.

ATL:
777
767-400
330
7ER (767-300, 757-200, 757-300)
737
320
M88
717

CVG:
737

DTW: (777 is closing there)
350
330
7ER
737
320
717

LAX:
777
7ER
737
717

MSP:
330
7ER
737
320
M88 (closing)

NYC:
767-400
330
7ER
737
320
220
717

SEA:
330
7ER
737

SLC:
7ER
737
320
220