Diet Coke 1.5L Price at Subway (2026)
A Diet Coke 1.5L at Subway in United Kingdom is priced at £4.49 as of September 2026.
A Diet Coke 1.5L at Subway costs £4.49 in the United Kingdom as of September 2026. That's about 50% above the typical Subway drink item — the 3rd-most-expensive 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. Set a free alert to know the moment this price changes on MenuPriceToday.
How this compares in Drinks
24 items tracked| This item | £4.49 |
| 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 | +50% |
Compare Subway prices across 20+ countries — Fast-Food Price Index →