Distance from Boulogne-Billancourt to Cergy-Pontoise
How far is it from Boulogne-Billancourt to Cergy-Pontoise? About 16 mi in a straight line and 22 mi by road. Driving time, flight time, midpoint and route details.
Boulogne-Billancourt and Cergy-Pontoise are about 16 mi (26 km) apart in a straight line. By road that works out to roughly 22 mi (36 km), a drive of about 31 min. A nonstop flight covers the great-circle distance in approximately 32 min.
| Straight-line distance | 16 mi / 26 km |
| Road distance (est.) | 22 mi / 36 km |
| Driving time (est.) | 31 min |
| Nonstop flight (est.) | 32 min |
| Driving fuel (est., 1-way) | $3 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | 48.937, 2.160 |
How these estimates work
Straight-line distance uses the haversine formula on each city's coordinates. Road distance applies a circuity factor (~1.2–1.4×) and driving time a blended average speed. Flight time uses typical jet cruise speed plus ~30 minutes for taxi, climb and descent. Treat all figures as planning estimates.
Frequently asked questions
Boulogne-Billancourt to Cergy-Pontoise is about 16 mi (26 km) in a straight line, and roughly 22 mi (36 km) by road.