Air Miles Calculator

Distance between Seattle, WA (BFI) and St Augustine, FL (UST)

Flight distance from Seattle to St Augustine (Seattle Boeing Field – Northeast Florida Regional Airport) is 2484 miles / 3997 kilometers / 2158 nautical miles. Estimated flight time is 5 hours 12 minutes.

Driving distance from Seattle (BFI) to St Augustine (UST) is 3037 miles / 4888 kilometers and travel time by car is about 50 hours 45 minutes.

Map of flight path and driving directions from Seattle to St Augustine.

Shortest flight path between Seattle Boeing Field (BFI) and Northeast Florida Regional Airport (UST).

How far is St Augustine from Seattle?

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

Vincenty's formula (applied above)
  • 2483.601 miles
  • 3996.968 kilometers
  • 2158.190 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
  • 2480.014 miles
  • 3991.196 kilometers
  • 2155.074 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 Seattle Boeing Field
City: Seattle, WA
Country: United States Flag of United States
IATA Code: BFI
ICAO Code: KBFI
Coordinates: 47°31′47″N, 122°18′7″W

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

Time difference and current local times

The time difference between Seattle and St Augustine is 3 hours. St Augustine is 3 hours ahead of Seattle.

Time Difference

Seattle, WA

 PDT

St Augustine, FL

 EDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 273 kg (602 pounds).

Frequent Flyer Miles Calculator

Seattle (BFI) → St Augustine (UST).

Distance:
2484
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
2484

Round trip?