Distance from Boston to Saint John
How far is it from Boston to Saint John? About 320 mi in a straight line and 391 mi by road. Driving time, flight time, midpoint and route details.
Boston and Saint John are about 320 mi (516 km) apart in a straight line. By road that works out to roughly 391 mi (629 km), a drive of about 6 hr 37 min. A nonstop flight covers the great-circle distance in approximately 1 hr 5 min.
| Straight-line distance | 320 mi / 516 km |
| Road distance (est.) | 391 mi / 629 km |
| Driving time (est.) | 6 hr 37 min |
| Nonstop flight (est.) | 1 hr 5 min |
| Driving fuel (est., 1-way) | $49 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | 43.842, -68.619 |
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
Boston to Saint John is about 320 mi (516 km) in a straight line, and roughly 391 mi (629 km) by road.