It is Student Universe- and I do have a uni email address ( I am in Australia).

The only thing is I just graduated- so technically I am not student anymore. I guess as you said though, if I can book the ticket I doubt I will have any problems when I get to the gate….

I have only actually purchased tickets through Student Universe. During the registration process, they’ll ask information about your school and your expected date of graduation, and they’ll ask for your school email address. If you provide them a .edu email address, they appear to simply accept that as identification. (If you don’t have a school email address, they say they can verify it through other means, but I don’t know how that process works — for me, the .edu email was enough).

As far as at the airport, I have flown on StudentUniverse tickets several times, and each time was not asked for any student identification (all were domestic United States flights on American or United) — I suspect that will be the case in almost all cases at the airport; the airline isn’t going to really care. I had a friend fly on a STA Travel ticket from the US to Rome and was also not asked for student id.

STA Travel I think has similar policies, although I think they require that you get an ISIC card. I have an account with them to search, and it appears that my student email address may have been enough there, too.