hotel near Kings Cross

I enjoyed the Megaro across the street from Kings Cross -- https://www.themegaro.co.uk/

Premier Inn

The Eurostar actually leaves from St. Pancras.

Why not stay at the Premier Inn St. Pancras which is across the street from the station?

I've stayed there a couple of times and will again next month when I take an early Eurostar to Brussels.

I stayed at the Premier Inn St Pancras in September. It is very convenient for the Eurostar.

There are actually three Premier Inns in the immediate area, all within walking distance of St Pancras. They are imaginatively called Euston, St Pancras and King's Cross.

If your budget is healthy the Renaissance St Pancras is literally on top of the station and is a wonderful refurbishment of the original station hotel.

I like the Rennaissance, a wonderful building and rooms if you manage to get placed in the original part rather than the more recent extension at the rear however it is more expensive than the nearby Premier Inn. Some rooms look out onto the Eurostar platforms, perfect for trainspotters and people watchers.