Distance from Great Falls, MT to Seattle, WA is 640Miles or 1030 Km. You can get this distance about 9 hours 58 mins. If you want to planning travel with plane for 515 Miles or 829 Km, You can get this distance about 1 hours 36 mins .
A car with an average MPG will needs 29.63 gallons of gas to get the route between these points.
The estimated cost of gas to get between Great Falls, MT and Seattle, WA is $67.26.
During the route, an average car will release 580.51 pounds of CO2 to the atmosphere. Your carbon footprint is 0.91 pounds of CO2 per mile.
* Average US MPG used for calculations is 21.6 MPG.
* Average US gas price used for calculation is 2.27 per gallon.