How far is Brest from Chicago, IL?

The distance between Chicago (Chicago O'Hare International Airport) and Brest (Brest Airport) is 4781 miles / 7695 kilometers / 4155 nautical miles.

Distance from Chicago to Brest

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

Vincenty's formula (applied above)

• 4781.231 miles
• 7694.646 kilometers
• 4154.776 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

• 4767.889 miles
• 7673.174 kilometers
• 4143.183 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 Brest?

The estimated flight time from Chicago O'Hare International Airport to Brest Airport is 9 hours and 33 minutes.

What is the time difference between Chicago and Brest?

The time difference between Chicago and Brest is 9 hours. Brest is 9 hours ahead of Chicago.

Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Brest Airport (BQT)

On average, flying from Chicago to Brest generates about 555 kg of CO2 per passenger, and 555 kilograms equals 1 225 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Chicago to Brest

See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Brest Airport (BQT).

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	Brest Airport
City:	Brest
Country:	Belarus
IATA Code:	BQT
ICAO Code:	UMBB
Coordinates:	52°6′29″N, 23°53′53″E