Ok. I ask that you PLEASE not log off without leaving a positive rating using smiley faces or 3 or more stars. This is VERY important and we do not finish just because it says, "To finish...". You may continue to ask additional questions without additional charge on this same thread even after you leave a positive rating.
It can take 2 to 4 months to get the Advance Parole approved. You should have filed it with the I-485. If you didn't, that's ok, but it will still take 2 to 4 months. You can ask that it be expedited and here is a link:
Doing it online may save you a few days is all, but if you file overnight express mail, it wouldn't make much of a difference to the processing time.
Keep in mind that you CANNOT leave the U.S. until approval of the Advance Parole. If you did leave before approval, you would abandon the I-485 and will have to do consular processing outside of the U.S.
Now that I have given you an answer, you may rate me positively OR ask for additional information. Please do not rate me negatively for bad news or things that you may already know. That does not help you or me. I am here to help you and I am on your side. Give me a chance to help you. All you have to do is respond asking for additional information. You are NOT charged per question nor are you charged per response. If this seems a little complicated or overwhelming, I can also offer you an additional service for a small fee where we can speak in private over the phone or through email that may be helpful (this is a public forum where anyone can read the responses). Feel free to decline it, but if you do, please remember that I am not given a salary, so the only way that I am compensated is if you rate me positively. So at least please use the smiley faces and a bonus is always appreciated if you feel I earned it. Also, your question does NOT close just because it says, "To finish". I can still answer additional questions for you without additional charge. If I do not hear from you, I will automatically send that additional offer request. Thank you for your understanding and if you would like to request me in the future, just type: FOR GUILLERMO in the subject line and message box.