What's the best way to travel to Windsor from Heathrow

[Jabbathehut]

DH & I have had some flight time changes on our May Floridian jaunt.
This will result in us arriving to Heathrow @ 1000hrs the day BEFORE we fly to Miami!
I would be keen to spend the Sunday in Windsor,which I love, and I believe it's roughly 12 miles away.
Could any kind FM advise me as to the best way to travel there and back?
MTIA

 

[mediastar]

Heathrow express to Paddington, Paddington to Slough, change there for the local line to Windsor, or there may be a local bus service from Heathrow to Windsor!
Try
http://www.travelinesoutheast.org.uk/se/XSLT_TRIP_REQUEST2#tripSelector2

 

[rosey]

Does the National Express coach go from Windsor to Heathrow? We use it from here in the south west to Heathrow and it is a great service. But maybe someone who lives that way might be able to help better.