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Distance from Smiley, TX to IAD Airport

Distance

1,591 mi

Time

1 day 4 hours

Gas Cost

$146 - $283

Helpful Inaccurate

There are 1,329.85 miles from Smiley to Washington Dulles International Airport (IAD) in northeast direction and 1,591 miles (2,560.47 kilometers) by car, following the I-40 route.

Smiley and IAD Airport are 1 day 4 hours far apart, if you drive non-stop .

This is the fastest route from Smiley, TX to IAD Airport. The halfway point is Coaling, AL.

Please note the time difference between Smiley, TX and IAD Airport is 1 hour. The current time in Smiley is 2:14 pm and the current time in IAD Airport is 3:14 pm.

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Lowest Price Rental Cars in Smiley, TX

Planning on renting a car to go from Smiley, TX to IAD Airport? Here there are some offers to rent a car in Smiley, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Smiley »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 63.90 gallons of gas to cover the route between Smiley, TX and IAD Airport.

The estimated cost of gas to go from Smiley to IAD Airport is $204.72.

During the route, an average car will release 1,251.84 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 Smiley, TX and IAD Airport

If you want to meet halfway between Smiley, TX and IAD Airport or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 33.176826 and -87.370613, or 33º 10' 36.5736" N, 87º 22' 14.2068" W. This location is 795.50 miles away from Smiley, TX and IAD Airport and it would take approximately 14 hours 12 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Coaling, AL, situated 785 miles from Smiley, TX and 775 miles from IAD Airport. It would take 12 hours 8 mins to go from Smiley to Coaling and 11 hours 50 mins to go from IAD to Coaling.