Distance from Bristol to Portsmouth

The straight-line (great-circle) distance between Bristol and Portsmouth is 126.4 kilometres, roughly 18 min by plane at 850 km/h. By road it is about 188 km via M4 and A34, which takes around 2 h 20 min of driving without stops. The map below shows both routes, and the calculator recomputes them for any other pair of places.

Straight line126.4 km
By road188 km
Driving time2 h 20 min
Flight time18 min

About this page

This page is for anyone planning a trip from Bristol to Portsmouth, in the United Kingdom. The straight-line distance comes from the haversine formula (great-circle distance). The road distance and driving time are the fastest car route on the OpenStreetMap road network, computed with OSRM; the actual time depends on traffic, stops and the roads you choose. Tap "Calculate distance" in the calculator to redraw the route live.

Frequently asked questions

What is the distance from Bristol to Portsmouth?
In a straight line it is 126.4 km. By road it is about 188 km, roughly 2 h 20 min of driving.
How long is the flight from Bristol to Portsmouth?
Roughly 18 min: the distance at a cruising speed of 850 km/h plus about 9 minutes for take-off and landing.
How many kilometres by road between Bristol and Portsmouth?
About 188 km on the fastest route via M4 and A34, which takes around 2 h 20 min by car. Tap "Calculate distance" in the calculator to see the route on the map.
How is this distance calculated?
The straight-line distance uses the haversine formula, which gives the shortest path between two points on the Earth's surface.