Distance between cities › USA › Missouri › Dexter, MO › Distance from Dexter to Affton Book Hotels

Distance from Dexter, MO to Affton, MO

Distance

161 mi

Time

3 hours 1 min

Gas Cost

$14 - $27

There are 122.96 miles from Dexter to Affton in north direction and 161 miles (259.10 kilometers) by car, following the I-55 route.

Dexter and Affton are 3 hours 1 min far apart, if you drive non-stop .

This is the fastest route from Dexter, MO to Affton, MO. The halfway point is Friedheim, MO.

Dexter, MO and Affton, MO are in the same time zone (CDT). Current time in both locations is 1:04 am.

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Lowest Price Rental Cars in Dexter, MO

Planning on renting a car to go from Dexter, MO to Affton, MO? Here there are some offers to rent a car in Dexter, MO

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Dexter »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 6.48 gallons of gas to cover the route between Dexter, MO and Affton, MO.

The estimated cost of gas to go from Dexter to Affton is $19.60.

During the route, an average car will release 126.97 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.03 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Dexter, MO and Affton, MO

If you want to meet halfway between Dexter, MO and Affton, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 37.601574 and -89.795486, or 37º 36' 5.6664" N, 89º 47' 43.7496" W. This location is 80.69 miles away from Dexter, MO and Affton, MO and it would take approximately 1 hour 30 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Friedheim, MO, situated 81 miles from Dexter, MO and 88 miles from Affton, MO. It would take 1 hour 26 mins to go from Dexter to Friedheim and 1 hour 26 mins to go from Affton to Friedheim.