Back in the day, pre-deregulation, you could get on an Ozark Airlines plane in Peoria, Ill and in less than 5 stops be anywhere between DEN
A trip to ORD
would allow you to see the following: Ozark, TWA, Eastern, Braniff, North Central, Piedmont, Southern and Allegheny (not defunct, but yeah, they are more or less).
Some of my favorite flights were on defunct carriers: Ozark, TWA, Frontier (a breathtakingly short flight from Kansas City to Topeka, Ks and they still managed to serve drinks), Pan Am, Eastern (we blew a tire once landing at DCA
, big fun for a 10 year old!), Mississppi Valley, Britt (now part of COExpress), Braniff (to MEX
when I was 4, yes I remember it) and a personal favorite, the British Airways forerunner Northeast.
I also remember when DCA
had National, Empire, Altair, Air Florida and Air Virginia (now part of AA
Guess I'm showing my age (37) but it seems watching planes was ALOT more interesting then.