How far is Union Island from Chicago, IL?

The distance between Chicago (Chicago O'Hare International Airport) and Union Island (Union Island Airport) is 2575 miles / 4145 kilometers / 2238 nautical miles.

Distance from Chicago to Union Island

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

Vincenty's formula (applied above)

• 2575.326 miles
• 4144.585 kilometers
• 2237.897 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

• 2578.876 miles
• 4150.299 kilometers
• 2240.982 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 Chicago to Union Island?

The estimated flight time from Chicago O'Hare International Airport to Union Island Airport is 5 hours and 22 minutes.

What is the time difference between Chicago and Union Island?

The time difference between Chicago and Union Island is 2 hours. Union Island is 2 hours ahead of Chicago.

Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Union Island Airport (UNI)

On average, flying from Chicago to Union Island generates about 284 kg of CO2 per passenger, and 284 kilograms equals 626 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Chicago to Union Island

See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Union Island Airport (UNI).

Airport information

Origin	Chicago O'Hare International Airport
City:	Chicago, IL
Country:	United States
IATA Code:	ORD
ICAO Code:	KORD
Coordinates:	41°58′42″N, 87°54′17″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