Distance between cities › USA › Illinois › Walnut, IL › Distance from Walnut to Seattle–Tacoma International Airport Book Hotels

Distance from Walnut, IL to SEA Airport

Distance

1,980 mi

Time

1 day 10 hours

Gas Cost

$185 - $359

Helpful Inaccurate

There are 1,649.50 miles from Walnut to Seattle–Tacoma International Airport (SEA) in northwest direction and 1,980 miles (3,186.50 kilometers) by car, following the I-90 route.

Walnut and SEA Airport are 1 day 10 hours far apart, if you drive non-stop .

This is the fastest route from Walnut, IL to SEA Airport. The halfway point is Gillette, WY.

Please note the time difference between Walnut, IL and SEA Airport is 2 hours. The current time in Walnut is 1:26 pm and the current time in SEA Airport is 11:26 am.

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Lowest Price Rental Cars in Walnut, IL

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Walnut »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 79.53 gallons of gas to cover the route between Walnut, IL and SEA Airport.

The estimated cost of gas to go from Walnut to SEA Airport is $259.43.

During the route, an average car will release 1,558.15 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 Walnut, IL and SEA Airport

If you want to meet halfway between Walnut, IL 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 44.208061 and -106.039124, or 44º 12' 29.0196" N, 106º 2' 20.8464" W. This location is 990.15 miles away from Walnut, IL and SEA Airport and it would take approximately 17 hours 25 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Gillette, WY, situated 999 miles from Walnut, IL and 1,055 miles from SEA Airport. It would take 14 hours 9 mins to go from Walnut to Gillette and 15 hours 13 mins to go from SEA to Gillette.