Green’s Dictionary of Slang

a stewardess, an air hostess.

1968		K. Brasselle Cannibals 45: The ‘stewies’ always locked off two seats for me.
1970		J. Bouton Ball Four 217: [T]he stewardesses (we call them stews) were droning about fastening seatbelts.
1986		S. King It (1987) 171: One of the stews serving first class on the Omaha-to-Chicago run.
1996		P. Temple Bad Debts (2012) [ebook] Talking pussies, you want to pick your stewie. Mate of mine put his hand in the golden triangle, found a big cock. Quantas I think it was.
2001		(con. 1964–8) J. Ellroy Cold Six Thousand 3: The flight ran smooth. A stew served drinks.
2013		J. Stahl Bad Sex on Speed 137: Who do we see but that poor bedraggled stew.
2021		J. Ellroy Widespread Panic 26: A Pan Am stew.