Cheapest Onions in the UK

Prices updated 15 August 2026 · 114 products across 7 supermarkets

The best-value onions in the UK right now is Tesco Brown Onions 3 Pack at Tesco — £0.32/each (£0.95).

114Products Compared

7Supermarkets

£0.32Lowest /Each

We compare onions across all 7 major UK supermarkets — Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S — and rank by price per unit so you can see where onions is genuinely cheapest. Prices update daily.

#	Product	Store	Price	Per Unit
1	Tesco Brown Onions 3 Pack	Tesco	£0.95	£0.32/each
2	Tesco Red Onions 3Pack Minimum	Tesco	£0.95	£0.32/each
3	NATURE'S PICK Large Brown Onions 3 Each	Aldi	£0.95	£0.32/each
4	NATURE'S PICK Large Red Onions 3 Each	Aldi	£0.95	£0.32/each
5	Sainsbury's Brown Onions x3	Sainsbury's	£0.95	£0.32/each
6	Sainsbury's Red Onions x3	Sainsbury's	£0.95	£0.32/each
7	Morrisons Red Onions 3 Pack	Morrisons	£0.95	£0.32/each
8	Morrisons Brown Onions 3 Pack	Morrisons	£0.95	£0.32/each
9	Waitrose Red Onions	Waitrose	£1.00	£0.33/each
10	M&S Red Onions 3 per pack	M&S	£1.00	£0.33/each
11	Market Street Large Cheese & Onion Baps 4 per pack	Morrisons	£1.40	£0.35/each
12	M&S Brown Cooking Onions 3 per pack	M&S	£1.30	£0.43/each
13	NATURE'S PICK Extra Large Mild Onions 3 Each	Aldi	£1.49	£0.50/each
14	Exceptional by ASDA Vine Ripened Tomatoes	Asda	£2.06	£0.52/each
15	Sainsbury's Sweet Onions, Taste the Difference x3	Sainsbury's	£1.65	£0.55/each
16	M&S Select Farms Mild Sweet Onions 3 per pack	M&S	£1.80	£0.60/each
17	Exceptional by ASDA Extra Large Onions	Asda	£1.84	£0.61/each
18	Morrisons The Best Sweet White Onions - 2 pack	Morrisons	£1.25	£0.62/each
19	JUST ESSENTIALS by ASDA Just Essentials Red Onions 1kg	Asda	£0.65	£0.65/kg
20	Sainsbury's Extra Large Brown Onions x2	Sainsbury's	£1.40	£0.70/each
21	Morrisons Large Mild Brown Onions 3 per pack	Morrisons	£2.10	£0.70/each
22	Tesco Finest Extra Large Brown Onions 2 Pack	Tesco	£1.60	£0.80/each
23	EVERYDAY ESSENTIALS British Wonky Brown Onions 1 KG	Aldi	£0.80	£0.80/kg
24	Waitrose Large Onions	Waitrose	£1.60	£0.80/each

See The Live Onions Comparison →

Cheapest Onions: FAQ

Where is the cheapest onions in the UK?

Right now the best value onions is Tesco Brown Onions 3 Pack at Tesco, £0.95 (£0.32/each). SmartShelf ranks onions by price per unit across 7 supermarkets, updated daily.

Which supermarket is cheapest for onions?

We compare onions across Tesco, Sainsbury's, Asda, Morrisons, Waitrose, Aldi and M&S. Today Tesco has the cheapest option, but the ranking updates every day as prices change.

How does SmartShelf compare onions prices?

We list each product's price per unit (£/kg, £/litre or per item) so you compare like for like, and we show loyalty prices such as Clubcard and Nectar where available — free, with no sign-up.