Map of flight path and driving directions from Seattle to St Louis.
Shortest flight path between Seattle–Tacoma International Airport (SEA) and St. Louis Lambert International Airport (STL).
How far is St Louis from Seattle?
There are several ways to calculate distances between Seattle and St Louis. 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 Seattle and St Louis is 2 hours. St Louis is 2 hours ahead of Seattle.
St Louis, MO
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 193 kg (426 pounds).
Frequent Flyer Miles Calculator
Seattle (SEA) → St Louis (STL).