Distance from Nong Khai to Samut Prakan
How far is it from Nong Khai to Samut Prakan? About 328 mi in a straight line and 400 mi by road. Driving time, flight time, midpoint and route details.
Nong Khai and Samut Prakan are about 328 mi (528 km) apart in a straight line. By road that works out to roughly 400 mi (645 km), a drive of about 6 hr 47 min. A nonstop flight covers the great-circle distance in approximately 1 hr 6 min.
| Straight-line distance | 328 mi / 528 km |
| Road distance (est.) | 400 mi / 645 km |
| Driving time (est.) | 6 hr 47 min |
| Nonstop flight (est.) | 1 hr 6 min |
| Driving fuel (est., 1-way) | $50 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | 15.742, 101.658 |
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
Nong Khai to Samut Prakan is about 328 mi (528 km) in a straight line, and roughly 400 mi (645 km) by road.