Map of flight path from San Juan to Union Island.
Shortest flight path between San Juan Luis Muñoz Marín International Airport (SJU) and Union Island Airport (UNI).
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).
|A||San Juan Luis Muñoz Marín International Airport|
|B||Union Island Airport|
|Country:||Saint Vincent and the Grenadines|
Time difference and current local times
There is no time difference between San Juan and Union Island.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 99 kg (219 pounds).
Frequent Flyer Miles Calculator
San Juan (SJU) → Union Island (UNI).