Every Fare 1 quote is built on a route distance figure. That number flows directly into the fare calculation, so understanding where it comes from — and why it may differ slightly from what your satnav or odometer shows — is worth a few minutes of your time.
Where the Distance Figure Comes From
When you enter a pickup and drop-off address on our booking platform, the system sends both locations through Google's routing engine. The engine returns a point-to-point distance along real roads — the same underlying data that powers Google Maps when you plan a journey yourself.
We canonicalise each address before routing. That means we resolve every place name or postcode to a precise geographic coordinate through Google's geocoding service, ensuring the measurement starts and ends at the right point. If you enter a hotel name rather than a street address, for example, the system resolves it to the hotel's front door rather than somewhere approximate nearby.
The result is a consistent, reproducible distance figure. Two customers booking the same route on different days will receive the same base distance input into their fare calculation.
Shortest Sensible Route
Our system selects the shortest sensible route between your endpoints. This broadly mirrors what an experienced local driver would choose under normal conditions — main roads and motorways where appropriate, avoiding unnecessary detours.
We request route alternatives where the mapping engine offers them and select the minimum-distance option. This matters on longer journeys in particular. For example, a trip from Southampton to a London airport might route via the M3 or via the A3 depending on which geometry is actually shorter. The system picks the shorter of the two, which in turn produces the lower fare.
What it does not do is account for live traffic. Our distance-based model prices by route geometry, not by journey time. A traffic-heavy day does not push your fare up — that is one of the deliberate features of fixed-fare pricing.
Why Your Odometer May Show a Different Number
If you pay attention to your car's trip computer on the same route and notice the mileage is not identical to the figure we used, there are a few entirely normal reasons for that.
Routing variation. Your driver may take a slightly different path on the day — a small diversion to avoid a known local bottleneck, or a road closure that did not exist when the route was mapped. Minor deviations do not affect your quoted price, which is locked at booking.
Odometer calibration. Vehicle odometers are calibrated to the factory tyre specification. A different tyre size, worn tyres, or a recently replaced wheel can produce readings that are a percentage off true distance. This is a vehicle measurement issue, not a mapping issue.
Positioning of measurement start and end points. Mapping engines measure from a defined reference point for each location — typically the centre of a building footprint or the main road frontage. Your driver's actual stopping point may be slightly before or after that reference. On a short in-town journey this can look like a meaningful percentage difference; on a motorway run it is negligible.
Interpolation on through roads. On long straight roads, mapping data is sometimes simplified for storage efficiency, meaning a recorded route may be marginally shorter than the physical road. The differences are small in absolute terms.
None of these factors change your fare after booking. The price you see at quote time is the price you pay.
Additional Stops Add Distance, Not a Flat Surcharge
If your journey includes intermediate stops — for example, collecting a second passenger before heading to an airport — those stops are included in the route. The system maps the full pickup-to-stop-to-drop-off path and measures its total distance. You are charged for the extra distance you are actually travelling; there is no flat stop surcharge added on top.
This means a stop that adds three miles to your route costs exactly the same as those three miles would cost anywhere else in the journey. It also means a short stop — pulling into a forecourt to collect a bag, for example — adds very little to the overall fare.
Worked Illustration
To give a sense of scale: a typical Southampton to Heathrow journey via the M3 is in the region of 75 to 80 miles by road. For a standard executive saloon, that translates to a base fare in the mid-to-upper two figures before any surcharges. The exact figure depends on the precise pickup and drop-off coordinates, which is why the live quote tool rather than a rough estimate is always the right starting point.
Get a precise distance-based quote for your journey at book.fare1.co.uk. The price shown is the price you pay — no adjustments at the end.