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

Distance from Smithfield, IL to SEA Airport

Distance

2,000 mi

Time

1 day 11 hours

Gas Cost

$188 - $366

Helpful Inaccurate

There are 1,650.42 miles from Smithfield to Seattle–Tacoma International Airport (SEA) in northwest direction and 2,000 miles (3,218.69 kilometers) by car, following the I-90 route.

Smithfield and SEA Airport are 1 day 11 hours far apart, if you drive non-stop .

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

Please note the time difference between Smithfield, IL and SEA Airport is 2 hours. The current time in Smithfield is 2:27 am and the current time in SEA Airport is 12:27 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Smithfield, IL to SEA Airport:

Lowest Price Rental Cars in Smithfield, IL

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Smithfield »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 80.31 gallons of gas to cover the route between Smithfield, IL and SEA Airport.

The estimated cost of gas to go from Smithfield to SEA Airport is $264.31.

During the route, an average car will release 1,573.52 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 $3.29 per gallon of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Smithfield, IL and SEA Airport

If you want to meet halfway between Smithfield, 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 44.196106 and -106.256905, or 44º 11' 45.9816" N, 106º 15' 24.858" W. This location is 999.91 miles away from Smithfield, IL and SEA Airport and it would take approximately 17 hours 43 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Buffalo, WY, situated 1,067 miles from Smithfield, IL and 988 miles from SEA Airport. It would take 15 hours 51 mins to go from Smithfield to Buffalo and 14 hours 7 mins to go from SEA to Buffalo.