How many miles are between Italy and Denver Colorado?

5,561 miles (88954 km) as calculated by the Great Circle Calculator (http://www.gb3pi.org.uk/great.html) based on latitude and longitude values collected here (http://www.infoplease.com/ipa/A0001769.html) and here (http://www.realestate3d.com/gps/uslatlongdegmin.htm)

[Rome = 41' 54" N, 12' 27" E]

[Denver = 39' 45" N, 104' 52" W]