Flight Time from South San Francisco to Union City
The flight from South San Francisco to Union City covers about 22 mi and takes roughly 32 min nonstop. Flight duration estimate and fare guide.
South San Francisco and Union City are about 22 mi (35 km) apart in a straight line. By road that works out to roughly 30 mi (49 km), a drive of about 42 min. A nonstop flight covers the great-circle distance in approximately 32 min.
| Straight-line distance | 22 mi / 35 km |
| Road distance (est.) | 30 mi / 49 km |
| Driving time (est.) | 42 min |
| Nonstop flight (est.) | 32 min |
| Driving fuel (est., 1-way) | $4 |
| Typical flight fare | $80–$250 |
| Geographic midpoint | 37.625, -122.213 |
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
South San Francisco to Union City is about 22 mi (35 km) in a straight line, and roughly 30 mi (49 km) by road.