Trying to get from NY to SIN in a couple weeks. There are a lot of options, but I have a few questions that I thought maybe someone could help me with:

1. As an American pilot, are there any foreign carriers that will give out J/S? - understood that it would be a seat in the cabin, space available.

2. Is international J/S available on cargo carriers? If so , which ones, and how would I find out the flight times?

3. Two options are UA and NW throught NRT. Is that indeed UA and NW that fly from NRT to SIN? (Not a code share?) If so, is it cool to just show up in NRT with the credentials to request a J/S to NRT? Do I need a ZED backup?

Thanks very much.