Flight Time from San Mateo to Union City
The flight from San Mateo to Union City covers about 6,981 mi and takes roughly 13 hr 20 min nonstop. Flight duration estimate and fare guide.
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.