Today's giant US Airways had humble origins in Allegheny Airlines. The majority of Fair visitors would come from East Coast cities, the market Allegheny primarily served. This regional carrier, known fondly to its customers as "Agony Air," promoted the Fair just like the national carriers.

This timetable from March of 1964 prominently features the Unisphere and the Fair. Page 8 of the timetable contains Allegheny's schedules into and out of New York and is captioned:

The New York World's Fair opens on April 22, 1964. Spend more time at the Fair ... not just getting there. Fly Allegheny, your Flight Gate to New York.

New York fares aren't shown, but a ticket from Philly to Pittsburgh would set you back about 20 1964 bucks.

Get your friends together and fly to the World's Fair. Ten or more can save up to 33 1/3% on the round trip fare.

Fly to the World's Fair on either Saturday or Sunday, return the same day, and save 37 1/2%. All you need is a round trip reservation.