How long a pecan pie last?

Thank you all for the answer. I start wondering if it would be wise to ship a pie after reading the threads. I will think about making mix for her. Thank you again.

Sam's suggestion is a good one - if it's not going to certain countries. My sister once sent me a box of Kraft mac & cheese, which Aussie customs opened, removed the cheese packet, and send the package along its way leaving just the crappy macaroni noodles. (Leaving aside for a moment that that packet is as far away from real cheese as possible)

So if the country doesn't allow nuts in, the mix could still be confiscated.

Where is your friend that she can't make her own? Or is she not a baker?

I'd second Sam. Crust would get soggy & pie would weep. Also look at Elizabeth Falkner's pecan pie milkshake! Yum!

William Sonoma has a 'pecan pie in a jar'..filling mix.
Being a sealed jarred product that might make it through customs for shipping.
Of course they'd have to assemble it with a crust of their own making or a store bought crust which should be available in most countries.
http://reviews.williams-sonoma.com/3177/pecan-pie-filling/reviews.htm

Where would it be travelling? Nuts are something that many customs officials don't look kindly upon (especially in places like Australia / New Zealand), so you risk having the baked good confiscated at the port of entry regardless of its edible condition.

Other than that, if you shipped it 2-3 day express it would probably be fine...but that's one very expensive pie.