Hi!

I wasn't sure if this was the right group for this question. Sorry if it isn't - please move it as you see fit.

I was wondering about discount codes that I can find on the web (like for 5% off) that aren't single use but I expect are posted publicly by organizations/conventions/conferences who have deals with the airlines. Can I safely use those codes if they work on the airline's website for me? Do airlines ask for anything related to that code at check-in time?

Don't want to save $50 and be denied boarding or something like that! I'll appreciate if somebody could say how it works.

Thanks!

G.