Calculations with different methods
- 1846.120 miles
- 2971.042 kilometers
- 1604.235 nautical miles
Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.Haversine formula
- 1841.724 miles
- 2963.967 kilometers
- 1600.414 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from O'Hare International Airport (ORD) to San Francisco International Airport (SFO) is 3 hours 59 minutes.
Time difference and current local times
The time difference between Chicago and San Francisco is 2 hours. San Francisco is 2 hours behind Chicago.
San Francisco, CA
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 214 kg (472 pounds).
Chicago to San Francisco flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → San Francisco (SFO).