what does the expession "I have air miles" mean?
I heard this on Fifty shades of grey movie.On Fifty shades of grey movie Anastasia's mother asks her to come because Anastasia was feeling sad the dialogue:"Listen,Honey,if you need a break you just come right on down here.Even if it's for a day or two.I have air miles,and we could talk and have girl time."

Question

what does the expession "I have air miles" mean?
I heard this on Fifty shades of grey movie.On Fifty shades of grey movie Anastasia's mother asks her to come because Anastasia was feeling sad the dialogue:"Listen,Honey,if you need a break you just come right on down here.Even if it's for a day or two.I have air miles,and we could talk and have girl time."

Answer

The humorous and cynical answer is "nothing". Air miles usually come with so many restrictions that they are practically worthless. Victor and Rich gave real answers.

Answer

It means (s)he has accumulated points in a certain rewards program that can be redeemed for air travel or other things. Your can read more about it here:

https://en.wikipedia.org/wiki/Air_Miles

Answer

This is an expression related to the loyalty program of airlines companies.
Each time you buy a ticket, they give you airmiles usually calculated on the basis of the distance you flew...
With these airmiles, once redeemed, you can get discounted or free tickets or discounts on a range of extra services

See link for an example https://www.airmiles.ca/arrow/Home