How far is Port of Spain from Union Island?

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

Distance from Union Island to Port of Spain

There are several ways to calculate the distance from Union Island to Port of Spain. 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 Union Island to Port of Spain?

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

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

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

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

On average, flying from Union Island to Port of Spain 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 Union Island to Port of Spain

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

Airport information

Origin	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

Destination	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