Air Miles Calculator

Distance between St Louis, MO (STL) and Seattle, WA (SEA)

Flight distance from St Louis to Seattle (St. Louis Lambert International Airport – Seattle–Tacoma International Airport) is 1709 miles / 2750 kilometers / 1485 nautical miles. Estimated flight time is 3 hours 44 minutes.

Driving distance from St Louis (STL) to Seattle (SEA) is 2103 miles / 3385 kilometers and travel time by car is about 34 hours 25 minutes.

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).

Airport information


A St. Louis Lambert International Airport
City: St Louis, MO
Country: United States Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″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 St Louis and Seattle is 2 hours. Seattle is 2 hours behind St Louis.

Time Difference

St Louis, MO

 CST

Seattle, WA

 PST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 193 kg (426 pounds).

Frequent Flyer Miles Calculator

St Louis (STL) → Seattle (SEA).

Distance:
1709
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1709

Round trip?