Honors College Interview - Attire?

My son has an interview on Friday at Univ of Illinois-Chicago for their Honors College (and scholarship consideration). We will be flying from PA to Chicago Friday morning for the interview session.

Any thoughts on proper attire for this? My thought is suit and tie since this is for the Honors College and scholarships. Of course it will be a pain for him to be getting dressed up at 3am before the drive to Baltimore and our flight to Chicago–but oh well!

shirt and tie with sweater over it? or just shirt and tie? I would not think there a need to wear a suit.
You just don’t want the clothes to be distracting.