Distance between Chicago, IL (ORD) and Seattle, WA (SEA)
Distance from Chicago to Seattle (O'Hare International Airport – Seattle–Tacoma International Airport) is 1721 miles / 2769 kilometers / 1495 nautical miles.
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Chicago - Seattle
How far is Seattle from Chicago?
There are several ways to calculate distances between Chicago and Seattle. Here are two common methods:
Vincenty's formula (applied above)- 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 – the shortest distance between two points).
Flight duration
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.
Time Difference
Chicago, IL
Seattle, WA
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 203 kg (447 pounds).
Airport information
| A | O'Hare International Airport |
|---|---|
| City: | Chicago, IL |
| Country: | United States  |
| IATA Code: | ORD |
| ICAO Code: | KORD |
| Coordinates: | 41°58′42″N, 87°54′17″W |
| B | Seattle–Tacoma International Airport |
|---|---|
| City: | Seattle, WA |
| Country: | United States |
| IATA Code: | SEA |
| ICAO Code: | KSEA |
| Coordinates: | 47°26′56″N, 122°18′32″W |
Map
Chicago to Seattle flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Seattle (SEA).
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