Map of flight path and driving directions from St Louis to Seattle.
Shortest flight path between St. Louis Lambert International Airport (STL) and Seattle–Tacoma International Airport (SEA).
How far is Seattle from St Louis?
There are several ways to calculate distances between St Louis and Seattle. Here are two common methods:Vincenty's formula (applied above)
- 1709.073 miles
- 2750.486 kilometers
- 1485.144 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
- 1705.259 miles
- 2744.349 kilometers
- 1481.830 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).
Time difference and current local times
The time difference between St Louis and Seattle is 2 hours. Seattle is 2 hours behind St Louis.
St Louis, MO
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 193 kg (426 pounds).
Frequent Flyer Miles Calculator
St Louis (STL) → Seattle (SEA).