Air Miles Calculator

Distance between Houston, TX (IAH) and San Antonio, TX (SAT)

Flight distance from Houston to San Antonio (Houston George Bush Intercontinental Airport – San Antonio International Airport) is 191 miles / 307 kilometers / 166 nautical miles. Estimated flight time is 51 minutes.

Driving distance from Houston (IAH) to San Antonio (SAT) is 215 miles / 346 kilometers and travel time by car is about 3 hours 37 minutes.

Map of flight path and driving directions from Houston to San Antonio.

Shortest flight path between Houston George Bush Intercontinental Airport (IAH) and San Antonio International Airport (SAT).

How far is San Antonio from Houston?

There are several ways to calculate distances between Houston and San Antonio. Here are two common methods:

Vincenty's formula (applied above)
  • 190.550 miles
  • 306.661 kilometers
  • 165.583 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
  • 190.206 miles
  • 306.106 kilometers
  • 165.284 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 Houston George Bush Intercontinental Airport
City: Houston, TX
Country: United States Flag of United States
IATA Code: IAH
ICAO Code: KIAH
Coordinates: 29°59′3″N, 95°20′29″W

B San Antonio International Airport
City: San Antonio, TX
Country: United States Flag of United States
IATA Code: SAT
ICAO Code: KSAT
Coordinates: 29°32′1″N, 98°28′11″W

Time difference and current local times

There is no time difference between Houston and San Antonio.

Time Difference

Houston, TX

 CDT

San Antonio, TX

 CDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 53 kg (117 pounds).

Frequent Flyer Miles Calculator

Houston (IAH) → San Antonio (SAT).

Distance:
191
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
191

Round trip?