Air Miles Calculator

Distance between Chicago, IL (ORD) and Seattle, WA (SEA)

Flight distance from Chicago to Seattle (Chicago O'Hare International Airport – Seattle–Tacoma International Airport) is 1721 miles / 2769 kilometers / 1495 nautical miles. Estimated flight time is 3 hours 45 minutes.

Driving distance from Chicago (ORD) to Seattle (SEA) is 2098 miles / 3376 kilometers and travel time by car is about 34 hours 13 minutes.

Map of flight path and driving directions from Chicago to Seattle.

Shortest flight path between Chicago O'Hare International Airport (ORD) and Seattle–Tacoma International Airport (SEA).

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).

Airport information


A Chicago O'Hare International Airport
City: Chicago, IL
Country: United States Flag of 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 Flag of United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W

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

 CDT

Seattle, WA

 PDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 189 kg (416 pounds).

Frequent Flyer Miles Calculator

Chicago (ORD) → Seattle (SEA).

Distance:
1721
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1721

Round trip?