Distance from Fort Sam Houston, TX to San Antonio, TX

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 0.21 gallons of gas to cover the route between Fort Sam Houston, TX and San Antonio, TX.

The estimated cost of gas to go from Fort Sam Houston to San Antonio is $0.72.

During the route, an average car will release 4.04 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 $3.48 per gallon of regular gas. Price last updated on March 18, 2026.
• Read more about our CO₂ calculation.

Halfway Point Between Fort Sam Houston, TX and San Antonio, TX

If you want to meet halfway between Fort Sam Houston, TX and San Antonio, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 29.438473 and -98.469757, or 29º 26' 18.5028" N, 98º 28' 11.1252" W. This location is 2.56 miles away from Fort Sam Houston, TX and San Antonio, TX and it would take approximately 5 minutes to reach the halfway point from both locations.

Weather in Fort Sam Houston and San Antonio

Compare the weather today and the next four days in Fort Sam Houston, TX and San Antonio, TX:

Fort Sam Houston

Sat Sep 5	Sun Sep 6	Mon Sep 7	Tue Sep 8	Wed Sep 9
37° 26°	35° 25°	36° 23°	38° 25°	38° 25°
3%	19%	5%	5%	4%
10	15	13	20	16

San Antonio

Sat Sep 5	Sun Sep 6	Mon Sep 7	Tue Sep 8	Wed Sep 9
37° 26°	36° 26°	36° 24°	38° 26°	38° 26°
4%	21%	6%	6%	4%
10	18	13	20	16

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