How much does Onions cost at Sainsbury's?
Onions costs £0.89 for 1kg bag at Sainsbury's (as of May 2026). The cheapest option is Aldi at £0.59.
£0.89
1kg bag
↑ 4.7%
Onions price at every UK supermarket
Here's how Sainsbury's's price compares to other major UK supermarkets, sorted cheapest to most expensive:
| Supermarket | Price | Change |
|---|---|---|
| Aldi | £0.59 | +7.3% |
| Lidl | £0.65 | +8.3% |
| Asda | £0.75 | +4.2% |
| Morrisons | £0.80 | +2.6% |
| Tesco | £0.85 | +6.2% |
| Sainsbury's (this page) | £0.89 | +4.7% |
| Co-op | £0.90 | +5.9% |
| Waitrose | £1.00 | +5.3% |
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Download SupermonsterFrequently asked questions
Onions (1kg bag) currently costs £0.89 at Sainsbury's. This price was last checked in May 2026.
No, Aldi is currently cheapest at £0.59, which is £0.30 less than Sainsbury's.
Yes, Onions at Sainsbury's has increased by +4.7% recently (from £0.85 to £0.89).