Distance from Cambridge to Portsmouth

The straight-line (great-circle) distance between Cambridge and Portsmouth is 175.5 kilometres, roughly 26 min by plane at 850 km/h. By road it is about 211 km via M25 and A1(M), which takes around 2 h 35 min of driving without stops. The map below shows both routes, and the calculator recomputes them for any other pair of places.

About this page

This page is for anyone planning a trip from Cambridge 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 Cambridge to Portsmouth?

In a straight line it is 175.5 km. By road it is about 211 km, roughly 2 h 35 min of driving.

How long is the flight from Cambridge to Portsmouth?

Roughly 26 min: the distance at a cruising speed of 850 km/h plus about 13 minutes for take-off and landing.

How many kilometres by road between Cambridge and Portsmouth?

About 211 km on the fastest route via M25 and A1(M), which takes around 2 h 35 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.