Red, were you a young bride with a newborn, who needed fed and diaper changes...No diapers then...
Little more complicated than carrying a nap sack and hitch hiking which is something many have done.
The point I was making was that a young person could travel by plane quite easily in the 60's. And a very young woman traveling alone with a newborn baby would have received a lot of attention and help by the flight attendants ... times were different and people were nicer to each other.
Also we are talking about may be a days travel time by air by herself not days and days.
I am not saying she did it just that it would not have been that difficult even with a baby.