Calculations with different methods
- 1720.561 miles
- 2768.975 kilometers
- 1495.127 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
- 1716.075 miles
- 2761.755 kilometers
- 1491.229 nautical miles
The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).
Estimated flight time from Seattle–Tacoma International Airport (SEA) to O'Hare International Airport (ORD) is 3 hours 45 minutes.
Time difference and current local times
The time difference between Seattle and Chicago is 2 hours. Chicago is 2 hours ahead of Seattle.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 203 kg (447 pounds).
Seattle to Chicago flight map.
Frequent Flyer Miles Calculator
Seattle (SEA) → Chicago (ORD).