how many air kilometres is it from The Spire Dublin to the Statue of
Liberty New York?

Hello roly2-ga

Thank-you for your question.

The Spire in Dublin is located at N53.21 W06.15 in terms of latitude
and longitude.  The Statue of Liberty is located at N40.41 W74.01.

These details were obtained here:
http://reference.allrefer.com/gazetteer/S/S15643-statue-of-liberty-national-monument.html
http://irish.typepad.com/irisheyes/2005/05/reorienting_goo.html

You can then use one of the many online distance calculators to do the
hard work of converting these numbers to a distance.  I used the one
at:
http://www.export911.com/convert/distaCaIc.htm

If you input the above values into the calculator you will discover
that The Spire is approximately 5124km from the Statue of Liberty.

If you require any further information on this subject please do not
hesitate to ask for clarification and I will do my best to respond
swiftly.

There is an identical question at

http://answers.google.com/answers/threadview?id=561170

As indicated in the comments there, there are some mistakes in this answer.