This is a plane flight from Traverse City, MI to Detroit, MI in 1959
$8.64 for a child, which is apparently half price. So an adult would be $17.28.
Miss R. says there were no layovers at Midland and Flint 
Some of the phone numbers on related documents were just 4 digits!
If you correct for the Consumer Price Index (CPI) that airplane flight would
cost $172 in 2023! Surprisingly, I could see that as possible.
In fact I could see it being cheaper than that today!