Getting around HTTPS on plane flight wifi?

[KeeganP]

I know this is a really strange question, but please hear me out.

I'm flying to Colorado right now on a Southwest Airlines flight. I have an online class meeting at 7pm(eastern), but the wifi on the flight blocks all websites with HTTPS. The website that I need to get to uses HTTPS. Does anyone know how to get to an HTTPS site on an in-air wifi network? I'm not as worried about the class as I am just notifying my teacher that I won't be able to attend. I figured that since the flight had wifi I would be just fine, but obviously I was wrong.

This is the only site I can access that I feel could be useful at all... Google, Facebook, Twitter, my online class website, etc. are all blocked. Safari (I'm on a Mac) says "cannot get a secure connection to <website url>"

Thanks for any help!!