Not all the internships specifically require the aviation science major, some will accept minors, some will accept any degree with experience. Furthermore, a few airlines also offer engineering internships, Southwest Airlines, for example. All hope is not lost. SLU has a good reputation with a number of internships, so you'll have plenty to choose from.

In any case, if I'm gathering your situation correctly, you have at least a year or two before you'll be considered for an internship. Most require completing your sophomore year.

Checko