Distance between cities › USA › Texas › Katy, TX › Distance from Katy to Washington Dulles International Airport Book Hotels

Distance from Katy, TX to IAD Airport

Distance

1,423 mi

Time

1 day 2 hours

Gas Cost

$130 - $253

Helpful Inaccurate

There are 1,220.60 miles from Katy to Washington Dulles International Airport (IAD) in northeast direction and 1,423 miles (2,290.10 kilometers) by car, following the I-10 route.

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

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

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

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Katy, TX to IAD Airport:

Lowest Price Rental Cars in Katy, TX

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Katy »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 57.13 gallons of gas to cover the route between Katy, TX and IAD Airport.

The estimated cost of gas to go from Katy to IAD Airport is $183.06.

During the route, an average car will release 1,119.36 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 Katy, TX and IAD Airport

If you want to meet halfway between Katy, 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 33.703320 and -86.534866, or 33º 42' 11.952" N, 86º 32' 5.5176" W. This location is 711.31 miles away from Katy, TX and IAD Airport and it would take approximately 13 hours 4 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Margaret, AL, situated 723 miles from Katy, TX and 716 miles from IAD Airport. It would take 11 hours 6 mins to go from Katy to Margaret and 11 hours 8 mins to go from IAD to Margaret.

Major City Closest to Halfway Point

The major city closest to the halfway point between Katy, TX and IAD Airport is Birmingham, AL, situated 695 miles from Katy, TX and 733 miles from IAD Airport. It would take 10 hours 35 mins to go from Katy to and 11 hours 14 mins to go from IAD to Birmingham.