Hotel at Heathrow airport

Which terminal, and how later are you arriving? I would have thought it would be easier to stay near St Pancras so youre closer for the Eurostar the next morning...

Agree with Simon. What time to you arrive at LHR? Too late to journey into London and stay near St. Pancras? Easy tube ride from LHR to St. Pancras which will take about an hour.

Delta usually uses Terminal 3 at LHR, and the Hilton Garden Inn is only a couple of minutes walk away. But logistically, it is likely more practical, as Simon suggests, to stay at one of the hotels close to St Pancras. For example the St Pancras Premier Inn is only a block away from the station. The Picadilly Tube goes all the way from LHR to Kings Cross, which is next door to St Pancras.

We are arriving at 5:30 PM and I believe Delta flies into terminal three. I am a Wheelchair user so it's not possible for me to take just any kind of transportation. My thinking is that we could rest up first evening, then catch the 1 PM train to Amsterdam the next afternoon. That way we should have plenty of time to figure out how to get there and get on the train and navigate the Wheelchair issue. A hotel that is easy to get to while moving a wheelchair and a couple suitcases would be great.

The Hilton Garden Inn would be my recommendation if you want to stay at Heathrow- direct access to the terminal.

I understand your thoughts on this, but personally I'd recommend staying near St Pancras - that way you have plenty of time to get to your train in the morning, and aren't rushing.

Would you consider the train? If not, a car service would be any option.

Which train would we take? Do you think it would be wheelchair accessible?

There are three options from Heathrow- the tube (some stations with level access), the Elizabeth Line (all stations level access) and the Heathrow Express to Paddington Station (level access). The Elizabeth Line and Heathrow Express would be easiest. Obviously then you need to get to your hotel.

This is a good guide:

https://tfl.gov.uk/transport-accessibility/wheelchair-access-and-avoiding-stairs#on-this-page-0

Otherwise you could take a car service. I just wouldn't stay at Heathrow overnight.

Like others, I would recommend staying near St Pancras. The Piccadilly line might be a bit stressful if the train is busy. Another option would be the Heathrow Express to Paddington, then either taxi or Hammersmith and City Line to King's Cross St Pancras.