Compare Tesco petrol and diesel prices across forecourts in and around Llanelli, Swansea. Cheapest unleaded from 172.9p, diesel from 196.9p. Updated today, 23 October 2026.
| Forecourt | Unleaded | Diesel | Distance |
|---|---|---|---|
| LLANELLI EXTRA - PETROL FILLING STATION TESCO STORES LTD |
172.9p | 196.9p | 2.2 mi |
| PONTARDDULAIS SUPERSTORE - PETROL FILLING STATION TIDAL REACH |
173.9p | 197.9p | 4 mi |