[quote=Jazzman]I wouldn’t take the Piccadilly line. It stops all the way into central London and will take forever. Most take the Heathrow Express which stops at Paddington Station. From there it’s a 15 minute cab ride to Euston. [/quote]
That’s a good option. It will save you about 25 minutes getting to Euston, but… the cost for two tickets will be 36 GBP plus the cab will be another 10 GBP. So, you’re in for about 35 GBP ($55 US) more than taking the tube. Which might make good sense depending on how you value your time. Personally, I actually enjoy taking the tube (the world’s finest big city public transportation system, in my opinion)… but that’s just me.