states

Hawaii

Pana`ewa Rainforest Zoo & Gardens

Located off Highway 11 in Hilo on the Island of Hawai'i
If you look at their zoo map, there is a butterfly house listed there. Could not find any other information as to hours or dates. Suggest contacting someone at the zoo for more information.
Link to the Zoo: Zoo

Illinois

Butterflies and Blooms

Chicago Botanic Garden,
1000 Lake Cook Road, Glencoe, Illinois
May 25th through September 2nd, 2013; 10am - 5pm. Weather permitting. Gardens are open later hours. Extra charge for butterfly exhibit.
Link to the Butterflies: Butterflies

Butterfly Month

Nicholas Conservatory and Gardens,
1354 N. 2nd St, Rockford, IL
April 2ndh through 28th, 2013
Link to the Butterflies: Butterflies

Peggy Notebaert Nature Museum

2430 N. Cannon Drive, Chicago, IL
Open year round
Link to the Butterflies: Butterflies

Butterflies!

Brookfield Zoo
3300 Golf Rd, Brookfield, IL
Check to see if they are having the exhibit this year. Small exhibit with native butterflies in screen enclosed area.
Link to the Butterflies: Butterflies

Butterfly House

Peck's Farm, 38W199 Kaneville Rd, Geneva, IL
Small seasonal summer exhibit. Open May 25th September 22nd, 2013.
Link to the Butterflies: Butterflies

Monarch Butterfly Festival

Lake Katherine Nature Center and Botanic Gardens, 7402 W. Lake Katherine Drive, Palos Heights, IL

September 15th, 2013. See webpage for more information.
Link to butterflies: Monarch Butterfly Festival

Indiana

Butterflies in Living Color

Potawatomi Zoo, 500 S. Greenlawn Ave, South Bend, IN
Seasonal exhibit opens May 26th thru September 3rd, 2012' 10am - 4:30pm.
Link to Butterflies: Zoo

White River Gardens - "Butterflies"

Located next to the Indianapolis Zoo, Indianapolis, IN
Seasonal Exhibit Mar 22nd, 2013. Check for closing date.
Link to Gardens: Gardens

Butterflies with an African Beat

Foellinger-Freimann Botanical Conservatory,
1100 South Calhoun Street, Fort Wayne, IN
Seasonal Exhibit April 13th - July 7th, 2013
Link to Butterflies: Gardens

Iowa

Monarch Butterfly Festival

Dickinson County Nature Center (to open August 14th)
2279 County Home Road, Okoboji, IA

Butterfly House open June through August. Check website for more info.

Held on August 28th, 2010, 10:30am - 3pm
Link to Festival: Click on 2010 Program Schedule link and look under August

Bricker Butterfly House & Botanical Garden

Corner of Hwy 59 and Sheridan Avenue, Shenandoah, IA
Completed renovations. Open year round.
Link to Butterflies: Gardens

Christina Reiman Butterfly Wing

Reiman Gardens, Iowa State University, Ames, IA
Open year round.
Link to the Butterflies: Butterflies

Garden Sanctuary for Butterflies

24668 Hwy. 52, Bellevue, IA
Seasonal outdoor garden
Link to the Butterflies: Sanctuary

Kansas

Butterfly/Pansy House

Botanica - Wichita Gardens; 701 Amidon, Wichita, KS
Seasonal Exhibit - June through September
Link to House: Butterflies

Kentucky

Butterfly Habitat

Lost River Cave, 2818 Nashville Road, Bowling Green, KY
Seasonal Exhibit - Open late May through September 5th, 2012.
Link to Butterfly Habitat: Butterflies

Louisiana

Grand Isle Butterfly Conservancy

Grand Isle Port Commission, Economic Development and Tourist Information Center, 2757 LA Hwy 1, Grand Isle, Louisianna

Monday through Sunday, 8 am - 5pm. Would suggest contacting to verify if open year round.

Butterflies: Butterfly House

Celebration of Butterflies

Haynesville, LA (Haynesville is located on U.S. Highway 79 in the Piney woods
near the Arkansas border)
Festival held mid-September. Check for exact date.
Link to Festival: Festival

Audubon Insectarium

423 Canal Street, U.S. Custom House, New Orleans, LA
Permanent Exhibit
Link to Insectarium: Insects