# Distance between Houston, TX (IAH) and Austin, TX (AUS)

Flight distance from Houston to Austin (Houston George Bush Intercontinental Airport – Austin–Bergstrom International Airport) is 140 miles / 226 kilometers / 122 nautical miles. Estimated flight time is 45 minutes.

Driving distance from Houston (IAH) to Austin (AUS) is 171 miles / 275 kilometers and travel time by car is about 2 hours 59 minutes.

## Map of flight path and driving directions from Houston to Austin.

Shortest flight path between Houston George Bush Intercontinental Airport (IAH) and Austin–Bergstrom International Airport (AUS).

## How far is Austin from Houston?

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

Vincenty's formula (applied above)
• 140.223 miles
• 225.667 kilometers
• 121.851 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
• 139.956 miles
• 225.238 kilometers
• 121.619 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
IATA Code: IAH
ICAO Code: KIAH
Coordinates: 29°59′3″N, 95°20′29″W

B Austin–Bergstrom International Airport
City: Austin, TX
Country: United States
IATA Code: AUS
ICAO Code: KAUS
Coordinates: 30°11′40″N, 97°40′11″W

## Time difference and current local times

There is no time difference between Houston and Austin.

CDT

CDT

## Carbon dioxide emissions

Estimated CO2 emissions per passenger is 46 kg (101 pounds).

## Frequent Flyer Miles Calculator

Houston (IAH) → Austin (AUS).

Distance:
140
Elite level bonus:
0
Booking class bonus:
0

### In total

Total frequent flyer miles:
140

Round trip?