What are the best days and times to go (shortest wait time) to the butterfly display.

If you buy a pass/annual membership you can get right in line inside

Not on the weekends that's for sure!

I went there on a Friday. The line wait was 1.5 hours. They open at 9 am. Maybe get there early. It was very nice. The butterfly house is open March and April only.

I have only been once and it was a Sunday and the lines were so long 3hr wait to see the butterflies So I do not recommend a Sunday

We went during the week on a Tues at 11:30 ish and waiting over an hour to see the butterflies.

I would recommend going during the weekday and arrive there 15 minutes before opening