How far is Union Island from Castries?

The distance between Castries (George F. L. Charles Airport) and Union Island (Union Island Airport) is 102 miles / 164 kilometers / 88 nautical miles.

Distance from Castries to Union Island

There are several ways to calculate the distance from Castries to Union Island. Here are two standard methods:

Vincenty's formula (applied above)

• 101.616 miles
• 163.535 kilometers
• 88.302 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

• 102.082 miles
• 164.285 kilometers
• 88.707 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 Castries to Union Island?

The estimated flight time from George F. L. Charles Airport to Union Island Airport is 41 minutes.

What is the time difference between Castries and Union Island?

There is no time difference between Castries and Union Island.

Flight carbon footprint between George F. L. Charles Airport (SLU) and Union Island Airport (UNI)

On average, flying from Castries to Union Island generates about 40 kg of CO2 per passenger, and 40 kilograms equals 88 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Castries to Union Island

See the map of the shortest flight path between George F. L. Charles Airport (SLU) and Union Island Airport (UNI).

Airport information

Origin	George F. L. Charles Airport
City:	Castries
Country:	Saint Lucia
IATA Code:	SLU
ICAO Code:	TLPC
Coordinates:	14°1′12″N, 60°59′34″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