Im trying to travel to Thailand and back and was curious if I could jumpseat internationally with just paying taxes?

I'm a regional pilot with Airways and UAL bennefits, but the passes on UAL are gonna cost me over 500$ rt. Im hoping to save a little cash.

Anyone with any info please feel free to pm or post.

I'd just like to know if I can show up at the ticket counter or gate on NWA/DAL, Cathay, ANA, Air China, ect and pay taxes all the way through to BKK.

My travel bureau is absolutely no help. Im just thinking if I can jumpseat around the US for free, why do I have to pay so much money other than international taxes?

Thanks again.