To the OP:
I traveled 4 times on my expired GC + extension letter.
I boarded my flight to the US from:
- Dubai
- Milan
- Moscow
- London
Ironically, the only hassle (minor anyways) I had was in London with a very English-speaking employee.
You have nothing to fear, you have a document issued by the US immigration authority which says that your status is extended for 1 year and travel is allowed.
When you clear customs and immigration in exit all they check is your passport and boarding pass.
It will be the airline that checks your status in the US. They're all familiar with the extension letter and they all speak English.
My husband has received the NOA1 a few months agao and we went to the local office on Tues and still got a stamp. He had a family emergency and needed to travel. We showed them the transfer letter to CSC from VSC dated Mar. 16, 2009 and he advised them he needed to travel. They looked at something in the computer and gave him the stamp and told him he was "good for one year." We were in and out in 10 min. This was in Charlotte NC, by the way.
laraninfaunion reacted to Italian_in_NYC in Can I travel - while I-751 is pending?