Originally Posted by HDMe2
Also... of all people on this show... Augie should know how to get a phone number.
A better question... would have been... how did Annie know he was with a stewardess at all?
She heard him meet someone on the plane... but I'm not sure she heard enough to know it was a stewardess. Maybe she did... and if so, then there were likely less than 5 on that plane... so it would be easy (especially if any were male or really old) to narrow it down to the one with Augie.
The whole scene on the plane was a set-up for the phone call later.
Augie was talking to Annie as the flight attendant was flirting with Augie and telling him it was her job to find a place that his luggage fit.
Annie's "secrets" comment seemed more like a nod to Auggie, who always seem to know what Annie is going to do, that she has skills too.
Since Augie has a reputation as a bit of a hound dog, that has been referred to several times, it makes it an easy step for us to follow.
As for the actual number, probably the easiest way is to find which attendant's cell GPS is in the same location as Auggie's.