# 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 2093 miles / 3368 kilometers and travel time by car is about 34 hours 0 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
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

## Time difference and current local times

The time difference between Chicago and Seattle is 2 hours. Seattle is 2 hours behind Chicago.

CDT

PDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 194 kg (428 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?