Originally Posted by
diburning
Also keep in mind that 1 FA per 50 pax is the minimum to be legal. Most full service carriers such as Delta will have more than that for efficiency purposes when it comes to onboard service, securing the cabin for arrival, etc.
DL staffs based on minimal staffing at least on the narrowbodies. A319/A220/717 will have 3 FAs, A320/A321/737/757-200 will have 4 FAs. I have seen the 767 get sent on on domestic hops with 5 crew but usually there is a 6th. 757-300s will have 5, these are interesting because the 5th can function like an 'addon' (4 ATL/XXX based flight attendants + 1 SEA/LAX/BOS/etc. based).
As mentioned above this is not necessarily true on longer hauls with more labor-intensive services and longer duty periods.