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Distance from Washington, TX to IAD Airport

Distance

1,426 mi

Time

1 day 2 hours

Gas Cost

$131 - $254

Helpful Inaccurate

There are 1,215.33 miles from Washington to Washington Dulles International Airport (IAD) in northeast direction and 1,426 miles (2,294.92 kilometers) by car, following the I-40 route.

Washington and IAD Airport are 1 day 2 hours far apart, if you drive non-stop .

This is the fastest route from Washington, TX to IAD Airport. The halfway point is Vestavia Hills, AL.

Please note the time difference between Washington, TX and IAD Airport is 1 hour. The current time in Washington is 12:55 pm and the current time in IAD Airport is 1:55 pm.

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Lowest Price Rental Cars in Washington, TX

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Washington »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 57.27 gallons of gas to cover the route between Washington, TX and IAD Airport.

The estimated cost of gas to go from Washington to IAD Airport is $183.48.

During the route, an average car will release 1,121.97 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 Washington, TX and IAD Airport

If you want to meet halfway between Washington, 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 33.420319 and -86.755028, or 33º 25' 13.1484" N, 86º 45' 18.1008" W. This location is 712.97 miles away from Washington, TX and IAD Airport and it would take approximately 13 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 Vestavia Hills, AL, situated 745 miles from Washington, TX and 738 miles from IAD Airport. It would take 11 hours 37 mins to go from Washington to Vestavia Hills and 11 hours 22 mins to go from IAD to Vestavia Hills.

Major City Closest to Halfway Point

The major city closest to the halfway point between Washington, TX and IAD Airport is Birmingham, AL, situated 746 miles from Washington, TX and 733 miles from IAD Airport. It would take 11 hours 38 mins to go from Washington to and 11 hours 15 mins to go from IAD to Birmingham.