Air Miles Calculator

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 Flag of 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 Flag of 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.

Time Difference

Seattle, WA

 PDT

Quincy, IL

 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?