Do I need a transit visa if I have I131 Advance parole and US work authorization???

[Stef Il]

Hi, I have a question. Im citizen of Serbia, I have a Serbian passport, no valid visa, im asylum applicant and I have to go back to Europe due urgent medical condition.
So my question, since there is a lot of flights over London, can I travel over the London with US work authorization and valid I131 Advance Parole and connect flight to the destination in Europe???
Thank you, who ever has any information, will help me a lot.

[NYUer]

I am not an expert in the field but my understanding is that you can travel anywhere as long as you have a valid reason (medical reasons) and a valid advance parole document. However, just to make it clear, your return will be heavily scrutinized as the CBP officers will make a final decision about whether to allow you to reenter the United States.