Time to get from airport terminal to train station

Which train station?

If you walk in my speed it will take you about 20 minutes to get to the Heathrow Express station or the tube station.

But if you mean the station where you take the train to Sheffield I don't know.

BTW. I think you will get more responds if you move this to the England section.

I don't think you go through Customs, but Immigration and Passport Control instead.
It all depends on who is ahead of you in line, so no possible way to tell.

Update:

Try http://www.nationalrail.co.uk/ to find out your options.

If you come from abroad you will go through immigration first and then customs (after getting your luggage) - but you may not notice the customs :-)

Which train station are you talking about? The only trains at Heathrow itself are the Heathrow Express/Connect and the Underground.

You have to get to either St. Pancras or Kings Cross rail stations to get a train to Sheffield.

There are two ways to get to those stations--Heathrow Express to Paddington and then either tube or taxi or Underground direct via Piccadilly line to Kings Cross. (St. Pancras is across the street)

The walk from the exit after walking through customs to the Heathrow terminal 1,2,3 station is about 15 minutes. It will take an hour more of less to then get to Kings Cross/St. Pancras although I would allow a little extra time to consider wait times and delays. (The Piccadilly line has had serious delays recently.)

The most straight forward way is to walk to the Piccadilly underground line c 15 minutes then take this all the way to Kings Cross/St Pancras. Otherwise you have much more walking and a change of tubes.

Use tfl.gov.uk for London journey planning.

Trains to Sheffield leave from St Pancras. The most convenient route is the Piccadilly Line from Heathrow to Kings Cross St Pancras tube station - an hour is probably a bit optimistic though. Don't buy a cheap London-Sheffield rail ticket in advance unless you're willing to leave several hours in case of tube delays. Also be aware that the platform for trains to Sheffield and the domestic rail ticket office are a long walk from the tube station platforms.

Getting from the airport terminal to Heathrow railway station is just one of the times you have to factor in, and not the largest. Very rough ballpark figures for the times after you land:

• Taxiing, de-planeing, walking through corridors: 20-30 minutes
• Immigration (passport control): 10 - 60 minutes.
• Luggage reclaim: 5 minutes (by the time you come out of immigration, your bags are probably waiting for you)
• Customs: 30 seconds (walk through "nothing to declare")
• Walk to underground station: 15-20 minutes.
• Piccadilly line train to Kings Cross St Pancras: 60 minutes. An alternative is Heathrow Express to Paddington, but than you need to take the tube to St Pancras, so it will only save ~15 minutes.
• Walk up out of underground station to correct platform at St Pancras: 5-10 minutes.

You can now catch your train to Sheffield.

Thank you .That is all very helpful. Its my first time in the UK so a great help .