The pubs were initially lowering their prices on a range of drinks throughout November.
However, they will now be offering the lower prices until the end of February 2022.
More than 750 Wetherspoon pubs are also adding to the offers with a mini bottle of Prosecco (200ml) at £2.99 and a bottle of Prosecco (750ml) for £10.99.
All hot drinks at every Wetherspoon pub (a range of coffees, tea, hot chocolate) will cost 99p with free refills.
At 671 pubs three drinks are on sale for 99p each; a pint of Ruddles Best (some pubs will be serving Greene King IPA), a bottle of Beck’s and a Bell’s whisky (25ml measure) including a mixer.
And at 99 pubs the pint of real ale will costs £1.10 with the bottle of Beck’s and a Bell’s whisky (25ml measure) including a mixer at 99p each.
In addition at each of the 770 pubs, Gordon’s gin (25ml measure) including a mixer will costs £1.99, a glass of Coldwater Creek (from a choice of Chardonnay, Pinot Grigio, Merlot, White Zinfandel Rose) costs £1.69 for a 175ml glass and a bottle of Hardys (from a choice of Chardonnay, Pinot Grigio, Shiraz, Rose) is available for £6.99.
Wetherspoon’s chairman Tim Martin, said: “ Our pubs are known for their excellent choice of drinks at value-for-money-prices at all times.
“We are delighted to be extending our lower prices until the end of February.”
Prices at Wetherspoon’s other pubs are also reduced but will vary in price. In the remaining pubs, a pint of real ale will costs from £1.49 to £1.99, a glass of wine from £1.99 to £2.79 and a Gordon’s gin (with mixer) from £1.99 to £2.99.
The pubs serving the real ale at £1.10 and not 99p are in Scotland and Wales which both have minimum unit price restrictions.
This offer excludes airport sites.