Glasses v contacts
Hi Jenn. I alter glasses and contacts when I'm at work (depending on check in time...). Any airline who prefers one or the others should tell you but I only know of one airline that won't accept glasses and it's located in the far east (can't for the life of me remember the name of the airline, sorry). Basically, if you wear your glasses to an interview and they ask you if you would be willing to wear contacts if they hire you, say yes. Then run to the opticians afterwards. HTH, and good luck!
Ps, if you're going to a Virgin interview, make sure you wear nail varnish and do your hear as if you're working for them already. That means up in a bun/french fancy swishy up bit (sorry, don't know what they're all called) with no whispy bits. Wear some make up as well. Basically make sure you look like you belong. I'm sure you'll be fine though, let us know how it went.