Diet Coke 500ml Price at Subway (2026)
A Diet Coke 500ml costs £2.69 at Subway in United Kingdom (updated September 2026).
Based on the latest tracked prices, the Diet Coke 500ml from Subway costs £2.69 in the United Kingdom (September 2026). That's about 10% below the typical Subway drink item — the 10th-cheapest of 24 we track. It's available at around 2 Subway locations across the United Kingdom. Prices are sourced from delivery platforms and refreshed regularly. Check the full Subway menu or compare drink prices on MenuPriceToday.
How this compares in Drinks
24 items tracked| This item | £2.69 |
| Drinks median | £2.99 |
| Cheapest — Robinsons Fruit Shoot Apple & Blackcurrent 200ml | £1.89 |
| Most expensive — Coca-Cola Zero Sugar 1.5L | £5.39 |
| vs Drinks median | −10% |
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