When did commercial air travel become an affordable travel option for the middle class?

Question

When did commercial air travel become an affordable travel option for the middle class?

Answer 1

The airlines were deregulated in 1978.  That allowed the airlines to compete against each other on routes.  So the prices started falling.

Answer 2

Are you trying to get someone to do your homework?

In the late 70s, with deregulation of the airlines, prices dropped enough that flying became the travel method of choice for the middle class.

Answer 3

Not anymore.  

Answer 4

when there was no other option?

i wouldn't call $1500 affordable, but when you have no other choice you pay it.

You cant exactly drive overseas...