Traveling after filing I-140

I am from India and I am on OPT. I have two approved EB-2 petitions. I will need to travel to London soon to attend a conference . I think I should be able to travel on my OPT but I just want o double check. Can someone confirm this for me? Will the officers ask about my approved I-140s?

to jeanette.gibson629:

yeah you should be able to travel on your OPT. I am from India as well and I have traveled back to India on my STEM after I got EB-2 approved. I think if the officers ask you can show them how backlogged the EB-2 is for Indian citizens