I found these on "www.handgunlaw.us"
Pennsylvania Permits/Licenses These State currently Honor your license:
Alaska, Arizona, Arkansas, Colorado, Florida
Georgia, Idaho, Indiana, Kentucky, Louisiana
Michigan, Missouri, Montana, New Hampshire, North Carolina
North Dakota, Oklahoma, South Dakota,Tennessee,Texas
Utah, Virginia, West Virginia, Wyoming
Check these sites before traveling because these states do change.
Pack-N-Go Carry Concealed Trip Planner
Handgunlaw.us (Best up to date website click state)
NRA-ILA :: Gun Laws all 50 states (Just click the state)
Gun-Free School Zones Act of 1996