Is it possible to get the airline miles after the trip? Say a couple of weeks.
Thanks

I've not had to do it recently, but in the past I have produced my original boarding passes and the airline has credited my miles. If you are a frequent flyer with the airline, call the ff number and their computer records are sometimes sufficient to get your miles credited.

Typically, yes.

I used my FF number when I traveled Delta from ATL to JNB in July and did not get any mileage posted to my account. I e-mailed requesting the 17,000 miles credit and it was posted within 24 hours.