Here is a 1970s clip showing people checking in at a California airport. 

The clip begins with one man being assisted at the CP Air check-in counter.We then see an older couple being assisted at the Lufthansa baggage check-in counter.

There is a shot of the Philippine Airlines name and logo.

Airline employees stand at computers at a long TWA check-in counter. Employees are typing on computers and reading what's showing up on their monitors. One customer wearing dark shades with a cigarette in his mouth appears to be getting his tickets. 

Arrivals and departures are listed on split-flap flight information display systems. 

One display reads: London, Hong Kong--Manila, Guam--Honolulu, Bucharest--Belgrade, Frankfurt--New York. 

Another display reads: Chicago, St. Louis, London, Albuquerque, Phoenix.

Yet another display reads: ARRIVAL Tokyo Non-Stop; DEPARTURE Honolulu--Tokyo, Tokyo.

The last shot shows a sign in Japanese.