Air Miles Calculator

Distance between San Juan (SJU) and Union Island (UNI)

Distance from San Juan to Union Island (San Juan Luis Muñoz Marín International Airport – Union Island Airport) is 505 miles / 812 kilometers / 439 nautical miles.

How far is Union Island from San Juan?

There are several ways to calculate distances between San Juan and Union Island. Here are two common methods:

Vincenty's formula (applied above)
  • 504.697 miles
  • 812.230 kilometers
  • 438.569 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
  • 506.007 miles
  • 814.339 kilometers
  • 439.708 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 San Juan Luis Muñoz Marín International Airport (SJU) to Union Island Airport (UNI) is 1 hour 27 minutes.

Time difference and current local times

There is no time difference between San Juan and Union Island.

Time Difference

San Juan
Union Island

San Juan

 AST

Union Island

 AST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 100 kg (220 pounds).

Airport information


A San Juan Luis Muñoz Marín International Airport
City: San Juan
Country: Puerto Rico Flag of Puerto Rico
IATA Code: SJU
ICAO Code: TJSJ
Coordinates: 18°26′21″N, 66°0′6″W

B Union Island Airport
City: Union Island
Country: Saint Vincent and the Grenadines Flag of Saint Vincent and the Grenadines
IATA Code: UNI
ICAO Code: TVSU
Coordinates: 12°36′0″N, 61°24′43″W

San Juan to Union Island flight path

Shortest flight path between San Juan Luis Muñoz Marín International Airport (SJU) and Union Island Airport (UNI).

Frequent Flyer Miles Calculator

San Juan (SJU) → Union Island (UNI).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
505
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
505

Round trip?