Diet Coke costs £3.25 at Costa Coffee in United Kingdom, as last recorded on 8 Nov 2026.
Wondering how much a Diet Coke costs at Costa Coffee in the United Kingdom? The current price is £3.25. That's about 0% above the typical Costa Coffee drink item — the 7th-most-expensive of 17 we track. It's available at around 40 Costa Coffee locations across the United Kingdom. Prices are sourced from delivery platforms and refreshed regularly. Compare it against other brands or set a free price-drop alert on MenuPriceToday.
How this compares in Drinks
17 items tracked| This item | £3.25 |
| Drinks median | £3.25 |
| Cheapest — Innocent Kids Smoothie | £2.25 |
| Most expensive — Innocent Plus Citrus Shield Juice | £4.20 |
| vs Drinks median | 0% |
Compare Costa Coffee prices across countries — Fast-Food Price Index →
Prices last updated 8 Nov 2026.
Similar Costa Coffee items by price
- Fanta Orange£3.25
- Oasis Summer Fruits Zero 500ml£3.25
- Sprite Zero£3.25
- Innocent Apple Juice 250ml£3.30
Sources & method
Prices come from delivery-platform menus (mainly Uber Eats in United Kingdom) and are refreshed about weekly. They are indicative: delivery-platform prices can differ from in-store prices, and each item shows the date it was last recorded. See the methodology and the editorial policy.
MenuPriceToday is not affiliated with Costa Coffee. Prices are indicative and may vary by location.