How far is Union Island from Port of Spain?

The distance between Port of Spain (Piarco International Airport) and Union Island (Union Island Airport) is 138 miles / 222 kilometers / 120 nautical miles.

Distance from Port of Spain to Union Island

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

Vincenty's formula (applied above)

• 137.890 miles
• 221.912 kilometers
• 119.823 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

• 138.606 miles
• 223.065 kilometers
• 120.446 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 Port of Spain to Union Island?

The estimated flight time from Piarco International Airport to Union Island Airport is 45 minutes.

What is the time difference between Port of Spain and Union Island?

There is no time difference between Port of Spain and Union Island.

Flight carbon footprint between Piarco International Airport (POS) and Union Island Airport (UNI)

On average, flying from Port of Spain to Union Island generates about 45 kg of CO2 per passenger, and 45 kilograms equals 100 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Port of Spain to Union Island

See the map of the shortest flight path between Piarco International Airport (POS) and Union Island Airport (UNI).

Airport information

Origin	Piarco International Airport
City:	Port of Spain
Country:	Trinidad and Tobago
IATA Code:	POS
ICAO Code:	TTPP
Coordinates:	10°35′43″N, 61°20′13″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