Take the Bakerloo line to Baker Street, then change to the first available train to King's Cross (Metropolitan, Hammersmith and City, or Circle Line)
An alternative, generally slower route, is to use the Circle or District Line to Edgware Road, then change for King's Cross. This route may be better for anyone with heavy luggage or who cannot walk very far as it involves fewer stairs.
If you arrive on platforms 13 or 14, or the west end of any of the platforms, make your way to the west end of the station and follow signs to Hammersmith and City Line. There is a separate Underground station from which trains on the Hammersmith and City line and Circle line run frequently, if not always rapidy, direct to King's Cross.
Bus 205 (accessible route for disabled persons) every few minutes from Praed Street outside the station, (near the main concourse) to King's Cross. This can be a slower route, it takes around 45 minutes but the journey time varies according to traffic conditions. Service operates 24 hours per day but less frequently at night.