How far is Union Island from San Juan?

The distance between San Juan (San Juan Luis Muñoz Marín International Airport) and Union Island (Union Island Airport) is 505 miles / 812 kilometers / 439 nautical miles.

Distance from San Juan to Union Island

There are several ways to calculate the distance from San Juan to Union Island. Here are two standard 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 planet.

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).

How long does it take to fly from San Juan to Union Island?

The estimated flight time from San Juan Luis Muñoz Marín International Airport to Union Island Airport is 1 hour and 27 minutes.

What is the time difference between San Juan and Union Island?

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

Flight carbon footprint between San Juan Luis Muñoz Marín International Airport (SJU) and Union Island Airport (UNI)

On average, flying from San Juan to Union Island generates about 99 kg of CO2 per passenger, and 99 kilograms equals 219 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from San Juan to Union Island

See the map of the shortest flight path between San Juan Luis Muñoz Marín International Airport (SJU) and Union Island Airport (UNI).

Airport information

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

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