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Chicago (ORD) - Seattle (SEA)
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 O'Hare International Airport (ORD) to Seattle–Tacoma International Airport (SEA) is 3 hours 45 minutes.
Time difference and current local times
The time difference between Chicago and Seattle is 2 hours. Seattle is 2 hours behind Chicago.
Flight map from Chicago to Seattle.
Frequent Flyer Miles Calculator
Chicago (ORD) → Seattle (SEA).