Distance from San Mateo to Union City
How far is it from San Mateo to Union City? About 6,981 mi in a straight line and 8,238 mi by road. Driving time, flight time, midpoint and route details.
San Mateo and Union City are about 6,981 mi (11,235 km) apart in a straight line. By road that works out to roughly 8,238 mi (13,257 km), a drive of about 139 hr 33 min. A nonstop flight covers the great-circle distance in approximately 13 hr 20 min.
Note: this is a long, likely intercontinental distance — driving may cross water and not be practical without ferries. Flying is usually the realistic option.
| Straight-line distance | 6,981 mi / 11,235 km |
| Road distance (est.) | 8,238 mi / 13,257 km |
| Driving time (est.) | 139 hr 33 min |
| Nonstop flight (est.) | 13 hr 20 min |
| Driving fuel (est., 1-way) | $1030 |
| Typical flight fare | $700–$1900 |
| Geographic midpoint | 42.788, 170.362 |
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
San Mateo to Union City is about 6,981 mi (11,235 km) in a straight line, and roughly 8,238 mi (13,257 km) by road.