Air Miles Calculator

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

Distance from O'Hare International Airport to Seattle–Tacoma International Airport is 1721 miles / 2769 kilometers / 1495 nautical miles.

Calculations with different 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).

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
Seattle

Chicago, IL

 CST

Seattle, WA

 PST

Airport information


A 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

Map

Flight map from Chicago to Seattle.

Frequent Flyer Miles Calculator

Chicago (ORD) → Seattle (SEA).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1721
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1721

Round trip?