Distance between cities › USA › Connecticut › Cornwall, CT › Distance from Cornwall to Seattle–Tacoma International Airport Book Hotels

Distance from Cornwall, CT to SEA Airport

Distance

2,898 mi

Time

2 days 4 hours

Gas Cost

$270 - $525

Helpful Inaccurate

There are 2,397.96 miles from Cornwall to Seattle–Tacoma International Airport (SEA) in west direction and 2,898 miles (4,663.88 kilometers) by car, following the I-90 route.

Cornwall and SEA Airport are 2 days 4 hours far apart, if you drive non-stop .

This is the fastest route from Cornwall, CT to SEA Airport. The halfway point is Mitchell, SD.

Please note the time difference between Cornwall, CT and SEA Airport is 3 hours. The current time in Cornwall is 2:25 pm and the current time in SEA Airport is 11:25 am.

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Lowest Price Rental Cars in Cornwall, CT

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Cornwall »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 116.38 gallons of gas to cover the route between Cornwall, CT and SEA Airport.

The estimated cost of gas to go from Cornwall to SEA Airport is $379.64.

During the route, an average car will release 2,280.18 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Cornwall, CT and SEA Airport

If you want to meet halfway between Cornwall, CT 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 43.654228 and -97.992630, or 43º 39' 15.2208" N, 97º 59' 33.468" W. This location is 1,448.97 miles away from Cornwall, CT 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 Mitchell, SD, situated 1,493 miles from Cornwall, CT and 1,469 miles from SEA Airport. It would take 22 hours 39 mins to go from Cornwall to Mitchell and 20 hours 43 mins to go from SEA to Mitchell.