Best Diet Root Beer Deals Online in the UK (10 Deals Found)

Last Updated - 24/09/2026 Sort By:

Best Choice
Dr Pepper

New
A&W Root Beer Fridge Pack Cans 12x335ml (Pack of 12) , Packaging may vary
Authentic American root beer

£17.99
Generic

New
Dad's Old Fashioned Root Beer Singles to Go Zero Sugar Drink Mix
CLASSIC ROOT BEER FLAVOUR: Enjoy the nostalgic taste of Dad's Old Fashioned Root Beer in a convenient drink mix format.

£6.49
Best Value
Puregro

New
A & W Root Beer 355ml Cans (2 X 12 Pack) - Total 24 Cans | Packaging may vary | Canadian Root Beer
Caffein free beer

£25.99 £32.99
GALAXEJUICE

New
Root Beer Food Flavouring Drops 10ml - Premium Rich Classic Extract for Professional Baking & Luxury American Beverages
🍺 PREMIUM ROOT BEER ESSENCE - Professional food grade concentrate capturing authentic rich classic root beer sophistica

£4.99
BARR

New
Barr Cream Soda Zero Sugar Sparkling Soft Drink, 24 Pack, 330ml Cans
Crafting bold, iconic drinks since 1875: AG Barr brings back the unmistakable taste of your childhood, flavours that sta

£8.00 £8.50
BARR

New
DNB Dandelion & Burdock Sparkling Soft Drink, 12 Pack, 500ml Bottles
Dandelion and Burdock shares a historical origin with root beer and sarsaparilla, which were originally made from lightl

£14.99
Puregro

New
A&W Root Beer | 355 ml | (pack of 12) | Caffeine Free | Packeging may very
Caffeine Free

£19.99
Hartridges

New
Hartridges | Celebrated Root Beer Vegan Soft Drink | 24 x 330ml
Classic Root Beer Flavour - Enjoy the distinctive, smooth taste of traditional root beer with aromatic sarsaparilla note

£36.95
My Africa Store

New
Root Beer 355ml Case of 12-Fd

£19.99
IRN-BRU

New
IRN-BRU Diet Carbonated Soft Drink, 24 Pack, 330ml Cans
IRN-BRU Sugar Free has no calories and all of the sugar taken out

£8.50

10 Diet Root Beer deals are available from: Amazon stores, starting from £4.99.
The biggest discount we found is 21% on A & W Root Beer 355ml Cans (2 X 12 Pack) - Total 24 Cans | Packaging may vary | Canadian Root Beer at Amazon.
The lowest price we found is £4.99 while the highest is £36.95.
Prices for the best Diet Root Beer deals average at £16.39.
Last updated on September 24, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Diet Root Beer.