The halfway point between Williamson County Regional Airport and Lambert-St. Louis International Airport is:

Clarmin, Illinois

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Halfway between MWA and STL

For a flight, the straight line geographic midpoint coordinates are 38° 15' 10" N and 89° 40' 53" W.

The city at the geographic halfway point from MWA to STL is Clarmin, Illinois.

The closest zip code to the flight midpoint is 62292.

Williamson County Regional Airport

IATA: MWA
ICAO: KMWA
FAA: MWA
City: Marion
State: Illinois
Zip code: 62959
Country: United States
Category: airports

Lambert-St. Louis International Airport

IATA: STL
ICAO: KSTL
FAA: STL
City: Saint Louis
State: Missouri
Zip code: 63145
Country: United States
Category: airports

Halfway point calculator

Travelmath helps you figure out the midpoint between two locations based on the driving directions from each starting point. You can find the closest town that is an equal distance from two cities. Use this tool to determine the best city to meet, or to look for interesting stops along the way if you're planning a long road trip and you need to take a break or stay overnight. Search for hotels at the midpoint city to split up your drive, or explore other nearby cities and discover local towns on your trip. If you're meeting a friend halfway in-between, you can figure out how far each person has to drive and how long it will take to arrive at the center. Even if you're separated by water, you can still calculate the straight line geographic midpoint to determine the closest flight distance.