Slaven Bilic is under an increasing amount of pressure at the London Stadium, with the Hammers’ board reportedly planning for the future.
Fulham boss Slavisa Jokanovic is also on the shortlist of potential candidates to take over.
Jokanovic could be thrust into the management chair at the London Stadium if results do not improve this season.
It would be difficult for the Hammers to lure Flores away from Spain mid-season, while Fulham are already beginning to look for possible replacements for their own manager.
Bilic’s contract runs out at the end of the season and talks over a new deal have stalled.