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Distance from Castleton, VT to SEA Airport

Distance

2,828 mi

Time

2 days 4 hours

Gas Cost

$259 - $503

Helpful Inaccurate

There are 2,352.83 miles from Castleton to Seattle–Tacoma International Airport (SEA) in west direction and 2,828 miles (4,551.22 kilometers) by car and ferry, following the I-90 route.

Castleton and SEA Airport are 2 days 4 hours far apart, if you drive non-stop for 2 days 1 hour and take a ferry for 2 hours 30 mins .

This is the fastest route from Castleton, VT to SEA Airport. The halfway point is Alexandria, SD.

Please note the time difference between Castleton, VT and SEA Airport is 3 hours. The current time in Castleton is 9:36 pm and the current time in SEA Airport is 6:36 pm.

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Lowest Price Rental Cars in Castleton, VT

Planning on renting a car to go from Castleton, VT to SEA Airport? Here there are some offers to rent a car in Castleton, VT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Castleton »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 113.57 gallons of gas to cover the route between Castleton, VT and SEA Airport.

The estimated cost of gas to go from Castleton to SEA Airport is $363.87.

During the route, an average car will release 2,225 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Castleton, VT and SEA Airport

If you want to meet halfway between Castleton, VT and SEA Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.643753 and -97.767891, or 43º 38' 37.5108" N, 97º 46' 4.4076" W. This location is 1,413.91 miles away from Castleton, VT and SEA Airport and it would take approximately 1 day 2 hours to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Alexandria, SD, situated 1,496 miles from Castleton, VT and 1,481 miles from SEA Airport. It would take 23 hours 1 min to go from Castleton to Alexandria and 20 hours 51 mins to go from SEA to Alexandria.