# Distance between Seattle, WA (BFI) and Quincy, IL (UIN)

Flight distance from Seattle to Quincy (Seattle Boeing Field – Quincy Regional Airport) is 1630 miles / 2623 kilometers / 1416 nautical miles. Estimated flight time is 3 hours 35 minutes.

Driving distance from Seattle (BFI) to Quincy (UIN) is 2023 miles / 3255 kilometers and travel time by car is about 33 hours 17 minutes.

## Map of flight path and driving directions from Seattle to Quincy.

Shortest flight path between Seattle Boeing Field (BFI) and Quincy Regional Airport (UIN).

## How far is Quincy from Seattle?

There are several ways to calculate distances between Seattle and Quincy. Here are two common methods:

Vincenty's formula (applied above)
• 1630.065 miles
• 2623.336 kilometers
• 1416.488 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
• 1626.235 miles
• 2617.172 kilometers
• 1413.160 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).

## Airport information

A Seattle Boeing Field
City: Seattle, WA
Country: United States
IATA Code: BFI
ICAO Code: KBFI
Coordinates: 47°31′47″N, 122°18′7″W

B Quincy Regional Airport
City: Quincy, IL
Country: United States
IATA Code: UIN
ICAO Code: KUIN
Coordinates: 39°56′33″N, 91°11′40″W

## Time difference and current local times

The time difference between Seattle and Quincy is 2 hours. Quincy is 2 hours ahead of Seattle.

PDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 188 kg (414 pounds).

## Frequent Flyer Miles Calculator

Seattle (BFI) → Quincy (UIN).

Distance:
1630
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
1630

Round trip?