# Distance between Washington D.C. (IAD) and St Augustine, FL (UST)

Flight distance from Washington D.C. to St Augustine (Washington Dulles International Airport – Northeast Florida Regional Airport) is 658 miles / 1058 kilometers / 572 nautical miles. Estimated flight time is 1 hour 44 minutes.

Driving distance from Washington D.C. (IAD) to St Augustine (UST) is 748 miles / 1203 kilometers and travel time by car is about 13 hours 9 minutes.

## Map of flight path and driving directions from Washington D.C. to St Augustine.

Shortest flight path between Washington Dulles International Airport (IAD) and Northeast Florida Regional Airport (UST).

## How far is St Augustine from Washington D.C.?

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

Vincenty's formula (applied above)
• 657.672 miles
• 1058.420 kilometers
• 571.501 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
• 658.896 miles
• 1060.391 kilometers
• 572.565 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 Washington Dulles International Airport
City: Washington D.C.
Country: United States
Coordinates: 38°56′40″N, 77°27′20″W

B Northeast Florida Regional Airport
City: St Augustine, FL
Country: United States
IATA Code: UST
ICAO Code: KSGJ
Coordinates: 29°57′33″N, 81°20′23″W

## Time difference and current local times

There is no time difference between Washington D.C. and St Augustine.

EDT

EDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 120 kg (264 pounds).

## Frequent Flyer Miles Calculator

Washington D.C. (IAD) → St Augustine (UST).

Distance:
658
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
658

Round trip?