Air Miles Calculator

Distance between Washington D.C. (IAD) and St Louis, MO (STL)

Distance from Washington D.C. to St Louis (Washington Dulles International Airport – St. Louis Lambert International Airport) is 696 miles / 1120 kilometers / 605 nautical miles.

How far is St Louis from Washington D.C.?

There are several ways to calculate distances between Washington D.C. and St Louis. Here are two common methods:

Vincenty's formula (applied above)
  • 696.181 miles
  • 1120.395 kilometers
  • 604.965 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
  • 694.488 miles
  • 1117.670 kilometers
  • 603.494 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).

Flight duration

Estimated flight time from Washington Dulles International Airport (IAD) to St. Louis Lambert International Airport (STL) is 1 hour 49 minutes.

Time difference and current local times

The time difference between Washington D.C. and St Louis is 1 hour. St Louis is 1 hour behind Washington D.C..

Time Difference

Washington D.C.
St Louis

Washington D.C.

 EDT

St Louis, MO

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 124 kg (274 pounds).

Airport information


A Washington Dulles International Airport
City: Washington D.C.
Country: United States Flag of United States
IATA Code: IAD
ICAO Code: KIAD
Coordinates: 38°56′40″N, 77°27′20″W

B 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

Washington D.C. to St Louis flight path

Shortest flight path between Washington Dulles International Airport (IAD) and St. Louis Lambert International Airport (STL).

Frequent Flyer Miles Calculator

Washington D.C. (IAD) → St Louis (STL).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
696
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
696

Round trip?