Over more decades than I care to count, I must have flown with about 30 airlines, a fair number of which are no longer with us. From memory I can recall the following:

Air France (A300)
Arkia
Autair (Herald)
BEA (Vanguard, Trident)
BCAL (707)
British Airways (various, including VC10)
British Midland
British United (1-11)
Continental
Eastern
Egyptair (An-24, Il-62, 707, 747)
El Al (707, 757)
Emirates
Finnair (Caravelle)
GibAir (DC-3)
Imperial Airlines
Lufthansa
Monarch (Britannia)
Olympic
PanAm (707)
Swissair
Texas International
United (DC-8)