Map of flight path from Chicago to San Sebastian.
Shortest flight path between Chicago O'Hare International Airport (ORD) and San Sebastián Airport (EAS).
How far is San Sebastian from Chicago?
There are several ways to calculate distances between Chicago and San Sebastian. Here are two common methods:Vincenty's formula (applied above)
- 4175.672 miles
- 6720.093 kilometers
- 3628.560 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
- 4164.680 miles
- 6702.402 kilometers
- 3619.008 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).
Time difference and current local times
The time difference between Chicago and San Sebastian is 7 hours. San Sebastian is 7 hours ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 485 kg (1 069 pounds).
Frequent Flyer Miles Calculator
Chicago (ORD) → San Sebastian (EAS).