Distance between cities › Australia › Victoria › Grass Flat, VIC › Distance from Grass Flat to Williamstown Book Hotels

Distance from Grass Flat, VIC to Williamstown, SA

Distance

408 km

Time

5 hours 13 mins

Gas Cost

$31 - $80

There are 348.04 km (216.26 miles) from Grass Flat to Williamstown in northwest direction and 408.77 km (254 miles) by car, following the A8 route.

Grass Flat and Williamstown are 5 hours 13 mins far apart, if you drive non-stop .

This is the fastest route from Grass Flat, VIC to Williamstown, SA.

Please note the time difference between Grass Flat, VIC and Williamstown, SA is 30 minutes. The current time in Grass Flat is 12:11 am (Mar 11) and the current time in Williamstown is 11:41 pm (Mar 10).

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Lowest Price Rental Cars in Grass Flat, VIC

Planning on renting a car to go from Grass Flat, VIC to Williamstown, SA? Here there are some offers to rent a car in Grass Flat, VIC

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Grass Flat »

Gas Consumption and Emissions

A car with a fuel efficiency of 10.8 l/100 km will need 44.11 liters of fuel to cover the route between Grass Flat, VIC and Williamstown, SA.

The estimated cost of fuel to go from Grass Flat to Williamstown is $66.16.

During the route, an average car will release 1,055 kilograms of CO₂ to the atmosphere. The carbon footprint would be 2.58 kilograms of CO₂ per kilometer.

Average Australia gas price used for calculation is $1.50 per liter of regular gas. Price last updated on March 10, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Grass Flat, VIC and Williamstown, SA

If you want to meet halfway between Grass Flat, VIC and Williamstown, SA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are -35.995671 and 140.26213, or 35º 59' 44.4156" S, 140º 15' 43.668" E. This location is 126.88 miles away from Grass Flat, VIC and Williamstown, SA and it would take approximately 2 hours 36 mins to reach the halfway point from both locations.

Distance conversions

Checkout the distance in miles, kilometers and nautical miles between Grass Flat, VIC and Williamstown, SA in this table:

Distance type	Miles	Kilometers	Nautical miles
Straight line distance	216.26 mi	348.04 km	187.93 nautical mi
Driving distance	254 mi	408.38 km	220.51 nautical mi

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